diff --git a/README.md b/README.md deleted file mode 100644 index ab7c2d7..0000000 --- a/README.md +++ /dev/null @@ -1,4454 +0,0 @@ -

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"Knowledge is powerful, be careful how you use it!"

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A collection of inspiring lists, manuals, cheatsheets, blogs, hacks, one-liners, cli/web tools, and more.

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- - Pull Requests - - - MIT License - -

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- Created by - trimstray and - contributors -
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- -**** - -## :notebook_with_decorative_cover:  What is it? - -This repository is a collection of various materials and tools that I use every day in my work. It contains a lot of useful information gathered in one piece. It is an invaluable source of knowledge for me that I often look back on. - -## :restroom:  For whom? - -For everyone, really. Here everyone can find their favourite tastes. But to be perfectly honest, it is aimed towards System and Network administrators, DevOps, Pentesters, and Security Researchers. - -## :information_source:  Contributing - -If you find something which doesn't make sense, or something doesn't seem right, please make a pull request and please add valid and well-reasoned explanations about your changes or comments. - -A few simple rules for this project: - -- inviting and clear -- not tiring -- useful - -These below rules may be better: - -- easy to contribute to (Markdown + HTML ...) -- easy to find (simple TOC, maybe it's worth extending them?) - -Url marked **\*** is temporary unavailable. Please don't delete it without confirming that it has permanently expired. - -Before adding a pull request, please see the **[contributing guidelines](.github/CONTRIBUTING.md)**. You should also remember about this: - -```diff -+ This repository is not meant to contain everything but only good quality stuff. -``` - -All **suggestions/PR** are welcome! - -### Code Contributors - -This project exists thanks to all the people who contribute. - - - -### Financial Contributors - -

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- -## :newspaper:  RSS Feed & Updates - -GitHub exposes an [RSS/Atom](https://github.com/trimstray/the-book-of-secret-knowledge/commits.atom) feed of the commits, which may also be useful if you want to be kept informed about all changes. - -## :ballot_box_with_check:  ToDo - -- [ ] Add new stuff... -- [ ] Add useful shell functions -- [ ] Add one-liners for collection tools (eg. CLI Tools) -- [ ] Sort order in lists - -New items are also added on a regular basis. - -## :anger:  Table of Contents - -Only main chapters: - -- **[CLI Tools](#cli-tools-toc)** -- **[GUI Tools](#gui-tools-toc)** -- **[Web Tools](#web-tools-toc)** -- **[Systems/Services](#systemsservices-toc)** -- **[Networks](#networks-toc)** -- **[Containers/Orchestration](#containersorchestration-toc)** -- **[Manuals/Howtos/Tutorials](#manualshowtostutorials-toc)** -- **[Inspiring Lists](#inspiring-lists-toc)** -- **[Blogs/Podcasts/Videos](#blogspodcastsvideos-toc)** -- **[Hacking/Penetration Testing](#hackingpenetration-testing-toc)** -- **[Your daily knowledge and news](#your-daily-knowledge-and-news-toc)** -- **[Other Cheat Sheets](#other-cheat-sheets-toc)** -- **[Shell One-liners](#shell-one-liners-toc)** -- **[Shell Tricks](#shell-tricks-toc)** -- **[Shell Functions](#shell-functions-toc)** - -## :trident:  The Book of Secret Knowledge (Chapters) - -#### CLI Tools  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: Shells - -

-  :small_orange_diamond: GNU Bash - is an sh-compatible shell that incorporates useful features from the Korn shell and C shell.
-  :small_orange_diamond: Zsh - is a shell designed for interactive use, although it is also a powerful scripting language.
-  :small_orange_diamond: tclsh - is a very powerful cross-platform shell, suitable for a huge range of uses.
-  :small_orange_diamond: bash-it - is a framework for using, developing and maintaining shell scripts and custom commands.
-  :small_orange_diamond: Oh My ZSH! - is the best framework for managing your Zsh configuration.
-  :small_orange_diamond: Oh My Fish - the Fishshell framework.
-  :small_orange_diamond: Starship - the cross-shell prompt written in Rust.
-  :small_orange_diamond: powerlevel10k - is a fast reimplementation of Powerlevel9k ZSH theme.
-

- -##### :black_small_square: Shell plugins - -

-  :small_orange_diamond: z - tracks the folder you use the most and allow you to jump, without having to type the whole path.
-  :small_orange_diamond: fzf - is a general-purpose command-line fuzzy finder.
-  :small_orange_diamond: zsh-autosuggestions - Fish-like autosuggestions for Zsh.
-  :small_orange_diamond: zsh-syntax-highlighting - Fish shell like syntax highlighting for Zsh.
-  :small_orange_diamond: Awesome ZSH Plugins - A list of frameworks, plugins, themes and tutorials for ZSH.
-

- -##### :black_small_square: Managers - -

-  :small_orange_diamond: Midnight Commander - is a visual file manager, licensed under GNU General Public License.
-  :small_orange_diamond: ranger - is a VIM-inspired filemanager for the console.
-  :small_orange_diamond: nnn - is a tiny, lightning fast, feature-packed file manager.
-  :small_orange_diamond: screen - is a full-screen window manager that multiplexes a physical terminal.
-  :small_orange_diamond: tmux - is a terminal multiplexer, lets you switch easily between several programs in one terminal.
-  :small_orange_diamond: tmux-cssh - is a tool to set comfortable and easy to use functionality, clustering and synchronizing tmux-sessions.
-

- -##### :black_small_square: Text editors - -

-  :small_orange_diamond: vi - is one of the most common text editors on Unix.
-  :small_orange_diamond: vim - is a highly configurable text editor.
-  :small_orange_diamond: emacs - is an extensible, customizable, free/libre text editor, and more.
-  :small_orange_diamond: micro - is a modern and intuitive terminal-based text editor.
-  :small_orange_diamond: neovim - is a free open source, powerful, extensible and usable code editor.
-  :small_orange_diamond: spacemacs - a community-driven Emacs distribution.
-  :small_orange_diamond: spacevim - a community-driven vim distribution.
-

- -##### :black_small_square: Files and directories - -

-  :small_orange_diamond: fd - is a simple, fast and user-friendly alternative to find.
-  :small_orange_diamond: ncdu - is an easy to use, fast disk usage analyzer.
-

- -##### :black_small_square: Network - -

-  :small_orange_diamond: PuTTY - is an SSH and telnet client, developed originally by Simon Tatham.
-  :small_orange_diamond: Mosh - is a SSH wrapper designed to keep a SSH session alive over a volatile connection.
-  :small_orange_diamond: Eternal Terminal - enables mouse-scrolling and tmux commands inside the SSH session.
-  :small_orange_diamond: nmap - is a free and open source (license) utility for network discovery and security auditing.
-  :small_orange_diamond: zmap - is a fast single packet network scanner designed for Internet-wide network surveys.
-  :small_orange_diamond: Rust Scan - to find all open ports faster than Nmap.
-  :small_orange_diamond: masscan - is the fastest Internet port scanner, spews SYN packets asynchronously.
-  :small_orange_diamond: pbscan - is a faster and more efficient stateless SYN scanner and banner grabber.
-  :small_orange_diamond: hping - is a command-line oriented TCP/IP packet assembler/analyzer.
-  :small_orange_diamond: mtr - is a tool that combines the functionality of the 'traceroute' and 'ping' programs in a single tool.
-  :small_orange_diamond: mylg - utility which combines the functions of the different network probes in one diagnostic tool.
-  :small_orange_diamond: netcat - utility which reads and writes data across network connections, using the TCP/IP protocol.
-  :small_orange_diamond: socat - utility which transfers data between two objects.
-  :small_orange_diamond: tcpdump - is a powerful command-line packet analyzer.
-  :small_orange_diamond: tshark - is a tool that allows us to dump and analyze network traffic (wireshark cli).
-  :small_orange_diamond: Termshark - is a simple terminal user-interface for tshark.
-  :small_orange_diamond: ngrep - is like GNU grep applied to the network layer.
-  :small_orange_diamond: netsniff-ng - is a Swiss army knife for your daily Linux network plumbing if you will.
-  :small_orange_diamond: sockdump - dump unix domain socket traffic.
-  :small_orange_diamond: stenographer - is a packet capture solution which aims to quickly spool all packets to disk.
-  :small_orange_diamond: tcpterm - visualize packets in TUI.
-  :small_orange_diamond: bmon - is a monitoring and debugging tool to capture networking related statistics and prepare them visually.
-  :small_orange_diamond: iptraf-ng - is a console-based network monitoring program for Linux that displays information about IP traffic.
-  :small_orange_diamond: vnstat - is a network traffic monitor for Linux and BSD.
-  :small_orange_diamond: iPerf3 - is a tool for active measurements of the maximum achievable bandwidth on IP networks.
-  :small_orange_diamond: ethr - is a Network Performance Measurement Tool for TCP, UDP & HTTP.
-  :small_orange_diamond: Etherate - is a Linux CLI based Ethernet and MPLS traffic testing tool.
-  :small_orange_diamond: echoip - is a IP address lookup service.
-  :small_orange_diamond: Nemesis - packet manipulation CLI tool; craft and inject packets of several protocols.
-  :small_orange_diamond: packetfu - a mid-level packet manipulation library for Ruby.
-  :small_orange_diamond: Scapy - packet manipulation library; forge, send, decode, capture packets of a wide number of protocols.
-  :small_orange_diamond: impacket - is a collection of Python classes for working with network protocols.
-  :small_orange_diamond: ssh-audit - is a tool for SSH server auditing.
-  :small_orange_diamond: aria2 - is a lightweight multi-protocol & multi-source command-line download utility.
-  :small_orange_diamond: iptables-tracer - observe the path of packets through the iptables chains.
-  :small_orange_diamond: inception - a highly configurable tool to check for whatever you like against any number of hosts.
-  :small_orange_diamond: mRemoteNG - a fork of mRemote, multi-tabbed PuTTy on steroids!
-

- -##### :black_small_square: Network (DNS) - -

-  :small_orange_diamond: dnsdiag - is a DNS diagnostics and performance measurement tools.
-  :small_orange_diamond: fierce - is a DNS reconnaissance tool for locating non-contiguous IP space.
-  :small_orange_diamond: subfinder - is a subdomain discovery tool that discovers valid subdomains for websites.
-  :small_orange_diamond: sublist3r - is a fast subdomains enumeration tool for penetration testers.
-  :small_orange_diamond: amass - is tool that obtains subdomain names by scraping data sources, crawling web archives, and more.
-  :small_orange_diamond: namebench - provides personalized DNS server recommendations based on your browsing history.
-  :small_orange_diamond: massdns - is a high-performance DNS stub resolver for bulk lookups and reconnaissance.
-  :small_orange_diamond: knock - is a tool to enumerate subdomains on a target domain through a wordlist.
-  :small_orange_diamond: dnsperf - DNS performance testing tools.
-  :small_orange_diamond: dnscrypt-proxy 2 - a flexible DNS proxy, with support for encrypted DNS protocols.
-  :small_orange_diamond: dnsdbq - API client providing access to passive DNS database systems.
-  :small_orange_diamond: grimd - fast dns proxy, built to black-hole internet advertisements and malware servers.
-   :small_orange_diamond: dnstwist - detect typosquatters, phishing attacks, fraud, and brand impersonation.
-

- -##### :black_small_square: Network (HTTP) - -

-  :small_orange_diamond: curl - is a command line tool and library for transferring data with URLs.
-  :small_orange_diamond: kurly - is an alternative to the widely popular curl program, written in Golang.
-  :small_orange_diamond: HTTPie - is an user-friendly HTTP client.
-  :small_orange_diamond: wuzz - is an interactive cli tool for HTTP inspection.
-  :small_orange_diamond: h2spec - is a conformance testing tool for HTTP/2 implementation.
-  :small_orange_diamond: h2t - is a simple tool to help sysadmins to hardening their websites.
-  :small_orange_diamond: htrace.sh - is a simple Swiss Army knife for http/https troubleshooting and profiling.
-  :small_orange_diamond: httpstat - is a tool that visualizes curl statistics in a way of beauty and clarity.
-  :small_orange_diamond: httplab - is an interactive web server.
-  :small_orange_diamond: Lynx - is a text browser for the World Wide Web.
-  :small_orange_diamond: Browsh - is a fully interactive, real-time, and modern text-based browser.
-  :small_orange_diamond: HeadlessBrowsers - a list of (almost) all headless web browsers in existence.
-  :small_orange_diamond: ab - is a single-threaded command line tool for measuring the performance of HTTP web servers.
-  :small_orange_diamond: siege - is an http load testing and benchmarking utility.
-  :small_orange_diamond: wrk - is a modern HTTP benchmarking tool capable of generating significant load.
-  :small_orange_diamond: wrk2 - is a constant throughput, correct latency recording variant of wrk.
-  :small_orange_diamond: vegeta - is a constant throughput, correct latency recording variant of wrk.
-  :small_orange_diamond: bombardier - is a fast cross-platform HTTP benchmarking tool written in Go.
-  :small_orange_diamond: gobench - http/https load testing and benchmarking tool.
-  :small_orange_diamond: hey - HTTP load generator, ApacheBench (ab) replacement, formerly known as rakyll/boom.
-  :small_orange_diamond: boom - is a script you can use to quickly smoke-test your web app deployment.
-  :small_orange_diamond: SlowHTTPTest - is a tool that simulates some Application Layer Denial of Service attacks by prolonging HTTP.
-  :small_orange_diamond: gobuster - is a free and open source directory/file & DNS busting tool written in Go.
-  :small_orange_diamond: ssllabs-scan - command-line reference-implementation client for SSL Labs APIs.
-  :small_orange_diamond: http-observatory - Mozilla HTTP Observatory cli version.
-  :small_orange_diamond: Hurl - is a command line tool to run and test HTTP requests with plain text.
-

- -##### :black_small_square: SSL - -

-  :small_orange_diamond: openssl - is a robust, commercial-grade, and full-featured toolkit for the TLS and SSL protocols.
-  :small_orange_diamond: gnutls-cli - client program to set up a TLS connection to some other computer.
-  :small_orange_diamond: sslyze - - fast and powerful SSL/TLS server scanning library.
-  :small_orange_diamond: sslscan - tests SSL/TLS enabled services to discover supported cipher suites.
-  :small_orange_diamond: testssl.sh - testing TLS/SSL encryption anywhere on any port.
-  :small_orange_diamond: cipherscan - a very simple way to find out which SSL ciphersuites are supported by a target.
-  :small_orange_diamond: spiped - is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses.
-  :small_orange_diamond: Certbot - is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server.
-  :small_orange_diamond: mkcert - simple zero-config tool to make locally trusted development certificates with any names you'd like.
-  :small_orange_diamond: certstrap - tools to bootstrap CAs, certificate requests, and signed certificates.
-  :small_orange_diamond: Sublert - is a security and reconnaissance tool to automatically monitor new subdomains.
-  :small_orange_diamond: mkchain - open source tool to help you build a valid SSL certificate chain.
-  :small_orange_diamond: ssl-cert-check - SSL Certification Expiration Checker.
-

- -##### :black_small_square: Security - -

-  :small_orange_diamond: SELinux - provides a flexible Mandatory Access Control (MAC) system built into the Linux kernel.
-  :small_orange_diamond: AppArmor - proactively protects the operating system and applications from external or internal threats.
-  :small_orange_diamond: grapheneX - Automated System Hardening Framework.
-  :small_orange_diamond: DevSec Hardening Framework - Security + DevOps: Automatic Server Hardening.
-

- -##### :black_small_square: Auditing Tools - -

-  :small_orange_diamond: ossec - actively monitoring all aspects of system activity with file integrity monitoring.
-  :small_orange_diamond: auditd - provides a way to track security-relevant information on your system.
-  :small_orange_diamond: Tiger - is a security tool that can be use both as a security audit and intrusion detection system.
-  :small_orange_diamond: Lynis - battle-tested security tool for systems running Linux, macOS, or Unix-based operating system.
-  :small_orange_diamond: LinEnum - scripted Local Linux Enumeration & Privilege Escalation Checks.
-  :small_orange_diamond: Rkhunter - scanner tool for Linux systems that scans backdoors, rootkits and local exploits on your systems.
-  :small_orange_diamond: PE-sieve - is a light-weight tool that helps to detect malware running on the system.
-  :small_orange_diamond: PEASS - privilege escalation tools for Windows and Linux/Unix and MacOS.
-

- -##### :black_small_square: System Diagnostics/Debuggers - -

-  :small_orange_diamond: strace - diagnostic, debugging and instructional userspace utility for Linux.
-  :small_orange_diamond: DTrace - is a performance analysis and troubleshooting tool.
-  :small_orange_diamond: ltrace - is a library call tracer, used to trace calls made by programs to library functions.
-  :small_orange_diamond: ptrace-burrito - is a friendly wrapper around ptrace.
-  :small_orange_diamond: perf-tools - performance analysis tools based on Linux perf_events (aka perf) and ftrace.
-  :small_orange_diamond: bpftrace - high-level tracing language for Linux eBPF.
-  :small_orange_diamond: sysdig - system exploration and troubleshooting tool with first class support for containers.
-  :small_orange_diamond: Valgrind - is an instrumentation framework for building dynamic analysis tools.
-  :small_orange_diamond: gperftools - high-performance multi-threaded malloc() implementation, plus some performance analysis tools.
-  :small_orange_diamond: glances - cross-platform system monitoring tool written in Python.
-  :small_orange_diamond: htop - interactive text-mode process viewer for Unix systems. It aims to be a better 'top'.
-  :small_orange_diamond: bashtop - Linux resource monitor written in pure Bash.
-  :small_orange_diamond: nmon - a single executable for performance monitoring and data analysis.
-  :small_orange_diamond: atop - ASCII performance monitor. Includes statistics for CPU, memory, disk, swap, network, and processes.
-  :small_orange_diamond: lsof - displays in its output information about files that are opened by processes.
-  :small_orange_diamond: FlameGraph - stack trace visualizer.
-  :small_orange_diamond: lsofgraph - convert Unix lsof output to a graph showing FIFO and UNIX interprocess communication.
-  :small_orange_diamond: rr - is a lightweight tool for recording, replaying and debugging execution of applications.
-  :small_orange_diamond: Performance Co-Pilot - a system performance analysis toolkit.
-  :small_orange_diamond: hexyl - a command-line hex viewer.
-  :small_orange_diamond: Austin - Python frame stack sampler for CPython.
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- -##### :black_small_square: Log Analyzers - -

-  :small_orange_diamond: angle-grinder - slice and dice log files on the command line.
-  :small_orange_diamond: lnav - log file navigator with search and automatic refresh.
-  :small_orange_diamond: GoAccess - real-time web log analyzer and interactive viewer that runs in a terminal.
-  :small_orange_diamond: ngxtop - real-time metrics for nginx server.
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- -##### :black_small_square: Databases - -

-  :small_orange_diamond: usql - universal command-line interface for SQL databases.
-  :small_orange_diamond: pgcli - postgres CLI with autocompletion and syntax highlighting.
-  :small_orange_diamond: mycli - terminal client for MySQL with autocompletion and syntax highlighting.
-  :small_orange_diamond: litecli - SQLite CLI with autocompletion and syntax highlighting.
-   :small_orange_diamond: mssql-cli - SQL Server CLI with autocompletion and syntax highlighting.
-  :small_orange_diamond: OSQuery - is a SQL powered operating system instrumentation, monitoring, and analytics framework.
-  :small_orange_diamond: pgsync - sync data from one Postgres database to another.
-  :small_orange_diamond: iredis - a terminal client for redis with autocompletion and syntax highlighting.
-  :small_orange_diamond: SchemaCrawler - generates an E-R diagram of your database.
-

- -##### :black_small_square: TOR - -

-  :small_orange_diamond: Nipe - script to make Tor Network your default gateway.
-  :small_orange_diamond: multitor - a tool that lets you create multiple TOR instances with a load-balancing.
-

- -##### :black_small_square: Messengers/IRC Clients - -

-  :small_orange_diamond: Irssi - is a free open source terminal based IRC client.
-  :small_orange_diamond: WeeChat - is an extremely extensible and lightweight IRC client.
-

- -##### :black_small_square: Productivity - -

-  :small_orange_diamond: taskwarrior - task management system, todo list
-

- -##### :black_small_square: Other - -

-  :small_orange_diamond: sysadmin-util - tools for Linux/Unix sysadmins.
-  :small_orange_diamond: incron - is an inode-based filesystem notification technology.
-  :small_orange_diamond: lsyncd - synchronizes local directories with remote targets (Live Syncing Daemon).
-  :small_orange_diamond: GRV - is a terminal based interface for viewing Git repositories.
-  :small_orange_diamond: Tig - text-mode interface for Git.
-  :small_orange_diamond: tldr - simplified and community-driven man pages.
-  :small_orange_diamond: archiver - easily create and extract .zip, .tar, .tar.gz, .tar.bz2, .tar.xz, .tar.lz4, .tar.sz, and .rar.
-  :small_orange_diamond: commander.js - minimal CLI creator in JavaScript.
-  :small_orange_diamond: gron - make JSON greppable!
-  :small_orange_diamond: bed - binary editor written in Go.
-

- -#### GUI Tools  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: Terminal emulators - -

-  :small_orange_diamond: Guake - is a dropdown terminal made for the GNOME desktop environment.
-  :small_orange_diamond: Terminator - is based on GNOME Terminal, useful features for sysadmins and other users.
-  :small_orange_diamond: Kitty - is a GPU based terminal emulator that supports smooth scrolling and images.
-  :small_orange_diamond: Alacritty - is a fast, cross-platform, OpenGL terminal emulator.
-

- -##### :black_small_square: Network - -

-  :small_orange_diamond: Wireshark - is the world’s foremost and widely-used network protocol analyzer.
-  :small_orange_diamond: Ettercap - is a comprehensive network monitor tool.
-  :small_orange_diamond: EtherApe - is a graphical network monitoring solution.
-  :small_orange_diamond: Packet Sender - is a networking utility for packet generation and built-in UDP/TCP/SSL client and servers.
-  :small_orange_diamond: Ostinato - is a packet crafter and traffic generator.
-  :small_orange_diamond: JMeter™ - open source software to load test functional behavior and measure performance.
-  :small_orange_diamond: locust - scalable user load testing tool written in Python.
-

- -##### :black_small_square: Browsers - -

-  :small_orange_diamond: TOR Browser - protect your privacy and defend yourself against network surveillance and traffic analysis.
-

- -##### :black_small_square: Password Managers - -

-  :small_orange_diamond: KeePassXC - store your passwords safely and auto-type them into your everyday websites and apps.
-  :small_orange_diamond: Bitwarden - open source password manager with built-in sync.
-  :small_orange_diamond: Vaultwarden - unofficial Bitwarden compatible server written in Rust.
-

- -##### :black_small_square: Messengers/IRC Clients - -

-  :small_orange_diamond: HexChat - is an IRC client based on XChat.
-  :small_orange_diamond: Pidgin - is an easy to use and free chat client used by millions.
-

- -##### :black_small_square: Messengers (end-to-end encryption) - -

-  :small_orange_diamond: Signal - is an encrypted communications app.
-  :small_orange_diamond: Wire - secure messaging, file sharing, voice calls and video conferences. All protected with end-to-end encryption.
-  :small_orange_diamond: TorChat - decentralized anonymous instant messenger on top of Tor Hidden Services.
-  :small_orange_diamond: Matrix - an open network for secure, decentralized, real-time communication.
-

- -##### :black_small_square: Text editors - -

-  :small_orange_diamond: Sublime Text - is a lightweight, cross-platform code editor known for its speed, ease of use.
-  :small_orange_diamond: Visual Studio Code - an open-source and free source code editor developed by Microsoft.
-  :small_orange_diamond: Atom - a hackable text editor for the 21st Century.
-

- -#### Web Tools  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: Browsers - -

-  :small_orange_diamond: SSL/TLS Capabilities of Your Browser - test your browser's SSL implementation.
-  :small_orange_diamond: Can I use - provides up-to-date browser support tables for support of front-end web technologies.
-  :small_orange_diamond: Panopticlick 3.0 - is your browser safe against tracking?
-  :small_orange_diamond: Privacy Analyzer - see what data is exposed from your browser.
-  :small_orange_diamond: Web Browser Security - it's all about Web Browser fingerprinting.
-  :small_orange_diamond: How's My SSL? - help a web server developer learn what real world TLS clients were capable of.
-  :small_orange_diamond: sslClientInfo - client test (incl TLSv1.3 information).
-

- -##### :black_small_square: SSL/Security - -

-  :small_orange_diamond: SSLLabs Server Test - performs a deep analysis of the configuration of any SSL web server.
-  :small_orange_diamond: SSLLabs Server Test (DEV) - performs a deep analysis of the configuration of any SSL web server.
-  :small_orange_diamond: ImmuniWeb® SSLScan - test SSL/TLS (PCI DSS, HIPAA and NIST).
-  :small_orange_diamond: SSL Check - scan your website for non-secure content.
-  :small_orange_diamond: SSL Scanner - analyze website security.
-  :small_orange_diamond: CryptCheck - test your TLS server configuration (e.g. ciphers).
-  :small_orange_diamond: urlscan.io - service to scan and analyse websites.
-  :small_orange_diamond: Report URI - monitoring security policies like CSP and HPKP.
-  :small_orange_diamond: CSP Evaluator - allows developers and security experts to check if a Content Security Policy.
-  :small_orange_diamond: Useless CSP - public list about CSP in some big players (might make them care a bit more).
-  :small_orange_diamond: Why No HTTPS? - top 100 websites by Alexa rank not automatically redirecting insecure requests.
-  :small_orange_diamond: TLS Cipher Suite Search- cipher suite search engine.
-  :small_orange_diamond: cipherli.st - strong ciphers for Apache, Nginx, Lighttpd, and more.*
-  :small_orange_diamond: dhtool - public Diffie-Hellman parameter service/tool.
-  :small_orange_diamond: badssl.com - memorable site for testing clients against bad SSL configs.
-  :small_orange_diamond: tlsfun.de - registered for various tests regarding the TLS/SSL protocol.
-  :small_orange_diamond: CAA Record Helper - generate a CAA policy.
-  :small_orange_diamond: Common CA Database - repository of information about CAs, and their root and intermediate certificates.
-  :small_orange_diamond: CERTSTREAM - real-time certificate transparency log update stream.
-  :small_orange_diamond: crt.sh - discovers certificates by continually monitoring all of the publicly known CT.
-  :small_orange_diamond: Hardenize - deploy the security standards.
-  :small_orange_diamond: Cipher suite compatibility - test TLS cipher suite compatibility.
-  :small_orange_diamond: urlvoid - this service helps you detect potentially malicious websites.
-  :small_orange_diamond: security.txt - a proposed standard (generator) which allows websites to define security policies.
-  :small_orange_diamond: ssl-config-generator - help you follow the Mozilla Server Side TLS configuration guidelines.
-  :small_orange_diamond: TLScan - pure python, SSL/TLS protocol and cipher scanner/enumerator.
-

- -##### :black_small_square: HTTP Headers & Web Linters - -

-  :small_orange_diamond: Security Headers - analyse the HTTP response headers (with rating system to the results).
-  :small_orange_diamond: Observatory by Mozilla - set of tools to analyze your website.
-  :small_orange_diamond: webhint - is a linting tool that will help you with your site's accessibility, speed, security, and more.
-

- -##### :black_small_square: DNS - -

-  :small_orange_diamond: ViewDNS - one source for free DNS related tools and information.
-  :small_orange_diamond: DNSLookup - is an advanced DNS lookup tool.
-  :small_orange_diamond: DNSlytics - online DNS investigation tool.
-  :small_orange_diamond: DNS Spy - monitor, validate and verify your DNS configurations.
-  :small_orange_diamond: Zonemaster - helps you to control how your DNS works.
-  :small_orange_diamond: Leaf DNS - comprehensive DNS tester.
-  :small_orange_diamond: Find subdomains online - find subdomains for security assessment penetration test.
-  :small_orange_diamond: DNSdumpster - dns recon & research, find & lookup dns records.
-  :small_orange_diamond: DNS Table online - search for DNS records by domain, IP, CIDR, ISP.
-  :small_orange_diamond: intoDNS - DNS and mail server health checker.
-  :small_orange_diamond: DNS Bajaj - check the delegation of your domain.
-  :small_orange_diamond: BuddyDNS Delegation LAB - check, trace and visualize delegation of your domain.
-  :small_orange_diamond: dnssec-debugger - DS or DNSKEY records validator.
-  :small_orange_diamond: PTRarchive.com - this site is responsible for the safekeeping of historical reverse DNS records.
-  :small_orange_diamond: xip.io - wildcard DNS for everyone.
-  :small_orange_diamond: nip.io - dead simple wildcard DNS for any IP Address.
-  :small_orange_diamond: dnslookup (ceipam) - one of the best DNS propagation checker (and not only).
-  :small_orange_diamond: What's My DNS - DNS propagation checking tool.
-  :small_orange_diamond: DNSGrep - quickly searching large DNS datasets.
-

- -##### :black_small_square: Mail - -

-  :small_orange_diamond: smtp-tls-checker - check an email domain for SMTP TLS support.
-  :small_orange_diamond: MX Toolbox - all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.
-  :small_orange_diamond: Secure Email - complete email test tools for email technicians.
-  :small_orange_diamond: blacklistalert - checks to see if your domain is on a Real Time Spam Blacklist.
-  :small_orange_diamond: MultiRBL - complete IP check for sending Mailservers.
-  :small_orange_diamond: DKIM SPF & Spam Assassin Validator - checks mail authentication and scores messages with Spam Assassin.
-

- -##### :black_small_square: Encoders/Decoders and Regex testing - -

-  :small_orange_diamond: URL Encode/Decode - tool from above to either encode or decode a string of text.
-  :small_orange_diamond: Uncoder - the online translator for search queries on log data.
-  :small_orange_diamond: Regex101 - online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript.
-  :small_orange_diamond: RegExr - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
-  :small_orange_diamond: RegEx Testing - online regex testing tool.
-  :small_orange_diamond: RegEx Pal - online regex testing tool + other tools.
-  :small_orange_diamond: The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis.
-

- -##### :black_small_square: Net-tools - -

-  :small_orange_diamond: Netcraft - detailed report about the site, helping you to make informed choices about their integrity.*
-  :small_orange_diamond: RIPE NCC Atlas - a global, open, distributed Internet measurement platform.
-  :small_orange_diamond: Robtex - uses various sources to gather public information about IP numbers, domain names, host names, etc.
-  :small_orange_diamond: Security Trails - APIs for Security Companies, Researchers and Teams.
-  :small_orange_diamond: Online Curl - curl test, analyze HTTP Response Headers.
-  :small_orange_diamond: Online Tools for Developers - HTTP API tools, testers, encoders, converters, formatters, and other tools.
-  :small_orange_diamond: Ping.eu - online Ping, Traceroute, DNS lookup, WHOIS and others.
-  :small_orange_diamond: Network-Tools - network tools for webmasters, IT technicians & geeks.
-  :small_orange_diamond: BGPview - search for any ASN, IP, Prefix or Resource name.
-  :small_orange_diamond: Is BGP safe yet? - check BGP (RPKI) security of ISPs and other major Internet players.
-  :small_orange_diamond: Riseup - provides online communication tools for people and groups working on liberatory social change.
-  :small_orange_diamond: VirusTotal - analyze suspicious files and URLs to detect types of malware.
-

- -##### :black_small_square: Privacy - -

-  :small_orange_diamond: privacyguides.org - provides knowledge and tools to protect your privacy against global mass surveillance.
-  :small_orange_diamond: DNS Privacy Test Servers - DNS privacy recursive servers list (with a 'no logging' policy).
-

- -##### :black_small_square: Code parsers/playgrounds - -

-  :small_orange_diamond: ShellCheck - finds bugs in your shell scripts.
-  :small_orange_diamond: explainshell - get interactive help texts for shell commands.
-  :small_orange_diamond: jsbin - live pastebin for HTML, CSS & JavaScript, and more.
-  :small_orange_diamond: CodeSandbox - online code editor for web application development.
-  :small_orange_diamond: PHP Sandbox - test your PHP code with this code tester.
-  :small_orange_diamond: Repl.it - an instant IDE to learn, build, collaborate, and host all in one place.
-  :small_orange_diamond: vclFiddle - is an online tool for experimenting with the Varnish Cache VCL.
-  :small_orange_diamond: Haskell Dockerfile Linter - a smarter Dockerfile linter that helps you build best practice Docker images.
-

- -##### :black_small_square: Performance - -

-  :small_orange_diamond: GTmetrix - analyze your site’s speed and make it faster.
-  :small_orange_diamond: Sucuri loadtimetester - test here the -performance of any of your sites from across the globe.
-  :small_orange_diamond: Pingdom Tools - analyze your site’s speed around the world.
-  :small_orange_diamond: PingMe.io - run website latency tests across multiple geographic regions.
-  :small_orange_diamond: PageSpeed Insights - analyze your site’s speed and make it faster.
-  :small_orange_diamond: web.dev - helps developers like you learn and apply the web's modern capabilities to your own sites and apps.
-  :small_orange_diamond: Lighthouse - automated auditing, performance metrics, and best practices for the web.
-

- -##### :black_small_square: Mass scanners (search engines) - -

-  :small_orange_diamond: Censys - platform that helps information security practitioners discover, monitor, and analyze devices.
-  :small_orange_diamond: Shodan - the world's first search engine for Internet-connected devices.
-  :small_orange_diamond: Shodan 2000 - this tool looks for randomly generated data from Shodan.
-  :small_orange_diamond: GreyNoise - mass scanner such as Shodan and Censys.
-  :small_orange_diamond: ZoomEye - search engine for cyberspace that lets the user find specific network components.
-  :small_orange_diamond: netograph - tools to monitor and understand deep structure of the web.
-  :small_orange_diamond: FOFA - is a cyberspace search engine.
-  :small_orange_diamond: onyphe - is a search engine for open-source and cyber threat intelligence data collected.
-  :small_orange_diamond: IntelligenceX - is a search engine and data archive.
-  :small_orange_diamond: binaryedge - it scan the entire internet space and create real-time threat intelligence streams and reports.
-  :small_orange_diamond: Spyse - Internet assets registry: networks, threats, web objects, etc.
-  :small_orange_diamond: wigle - is a submission-based catalog of wireless networks. All the networks. Found by Everyone.
-  :small_orange_diamond: PublicWWW - find any alphanumeric snippet, signature or keyword in the web pages HTML, JS and CSS code.
-  :small_orange_diamond: IntelTechniques - this repository contains hundreds of online search utilities.
-  :small_orange_diamond: hunter - lets you find email addresses in seconds and connect with the people that matter for your business.
-  :small_orange_diamond: GhostProject? - search by full email address or username.
-  :small_orange_diamond: databreaches - was my email affected by data breach?
-  :small_orange_diamond: We Leak Info - world's fastest and largest data breach search engine.
-  :small_orange_diamond: Pulsedive - scans of malicious URLs, IPs, and domains, including port scans and web requests.
-  :small_orange_diamond: Buckets by Grayhatwarfar - database with public search for Open Amazon S3 Buckets and their contents.
-  :small_orange_diamond: Vigilante.pw - the breached database directory.
-  :small_orange_diamond: builtwith - find out what websites are built with.
-  :small_orange_diamond: NerdyData - search the web's source code for technologies, across millions of sites.
-  :small_orange_diamond: zorexeye - search for sites, images, apps, softwares & more.
-  :small_orange_diamond: Mamont's open FTP Index - if a target has an open FTP site with accessible content it will be listed here.
-  :small_orange_diamond: OSINT Framework - focused on gathering information from free tools or resources.
-  :small_orange_diamond: maltiverse - is a service oriented to cybersecurity analysts for the advanced analysis of indicators of compromise.
-  :small_orange_diamond: Leaked Source - is a collaboration of data found online in the form of a lookup.
-  :small_orange_diamond: We Leak Info - to help everyday individuals secure their online life, avoiding getting hacked.
-  :small_orange_diamond: pipl - is the place to find the person behind the email address, social username or phone number.
-  :small_orange_diamond: abuse.ch - is operated by a random swiss guy fighting malware for non-profit.
-  :small_orange_diamond: malc0de - malware search engine.
-  :small_orange_diamond: Cybercrime Tracker - monitors and tracks various malware families that are used to perpetrate cyber crimes.
-  :small_orange_diamond: shhgit - find GitHub secrets in real time.
-  :small_orange_diamond: searchcode - helping you find real world examples of functions, API's and libraries.
-  :small_orange_diamond: Insecam - the world biggest directory of online surveillance security cameras.
-  :small_orange_diamond: index-of - contains great stuff like: security, hacking, reverse engineering, cryptography, programming etc.
-  :small_orange_diamond: Rapid7 Labs Open Data - is a great resources of datasets from Project Sonar.
-  :small_orange_diamond: Common Response Headers - the largest database of HTTP response headers.
-  :small_orange_diamond: InQuest Labs - InQuest Labs is an open, interactive, and API driven data portal for security researchers.
-

- -##### :black_small_square: Generators - -

-  :small_orange_diamond: thispersondoesnotexist - generate fake faces in one click - endless possibilities.
-  :small_orange_diamond: AI Generated Photos - 100.000 AI generated faces.
-  :small_orange_diamond: fakenamegenerator - your randomly generated identity.
-  :small_orange_diamond: Intigriti Redirector - open redirect/SSRF payload generator.
-

- -##### :black_small_square: Passwords - -

-  :small_orange_diamond: have i been pwned? - check if you have an account that has been compromised in a data breach.
-  :small_orange_diamond: dehashed - is a hacked database search engine.
-  :small_orange_diamond: Leaked Source - is a collaboration of data found online in the form of a lookup.
-

- -##### :black_small_square: CVE/Exploits databases - -

-  :small_orange_diamond: CVE Mitre - list of publicly known cybersecurity vulnerabilities.
-  :small_orange_diamond: CVE Details - CVE security vulnerability advanced database.
-  :small_orange_diamond: Exploit DB - CVE compliant archive of public exploits and corresponding vulnerable software.
-  :small_orange_diamond: 0day.today - exploits market provides you the possibility to buy/sell zero-day exploits.
-  :small_orange_diamond: sploitus - the exploit and tools database.
-  :small_orange_diamond: cxsecurity - free vulnerability database.
-  :small_orange_diamond: Vulncode-DB - is a database for vulnerabilities and their corresponding source code if available.
-  :small_orange_diamond: cveapi - free API for CVE data.
-

- -##### :black_small_square: Mobile apps scanners - -

-  :small_orange_diamond: ImmuniWeb® Mobile App Scanner - test security and privacy of mobile apps (iOS & Android).
-  :small_orange_diamond: Quixxi - free Mobile App Vulnerability Scanner for Android & iOS.
-  :small_orange_diamond: Ostorlab - analyzes mobile application to identify vulnerabilities and potential weaknesses.
-

- -##### :black_small_square: Private Search Engines - -

-  :small_orange_diamond: Startpage - the world's most private search engine.
-  :small_orange_diamond: searX - a privacy-respecting, hackable metasearch engine.
-  :small_orange_diamond: darksearch - the 1st real Dark Web search engine.
-  :small_orange_diamond: Qwant - the search engine that respects your privacy.
-  :small_orange_diamond: DuckDuckGo - the search engine that doesn't track you.
-  :small_orange_diamond: Swisscows - privacy safe web search
-  :small_orange_diamond: Disconnect - the search engine that anonymizes your searches.
-  :small_orange_diamond: MetaGer - the search engine that uses anonymous proxy and hidden Tor branches.
-

- -##### :black_small_square: Secure Webmail Providers - -

-  :small_orange_diamond: CounterMail - online email service, designed to provide maximum security and privacy.
-  :small_orange_diamond: Mail2Tor - is a Tor Hidden Service that allows anyone to send and receive emails anonymously.
-  :small_orange_diamond: Tutanota - is the world's most secure email service and amazingly easy to use.
-  :small_orange_diamond: Protonmail - is the world's largest secure email service, developed by CERN and MIT scientists.
-  :small_orange_diamond: Startmail - private & encrypted email made easy.
-

- -##### :black_small_square: Crypto - -

-  :small_orange_diamond: Keybase - it's open source and powered by public-key cryptography.
-

- -##### :black_small_square: PGP Keyservers - -

-  :small_orange_diamond: SKS OpenPGP Key server - services for the SKS keyservers used by OpenPGP.
-

- -#### Systems/Services  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: Operating Systems - -

-  :small_orange_diamond: Slackware - the most "Unix-like" Linux distribution.
-  :small_orange_diamond: OpenBSD - multi-platform 4.4BSD-based UNIX-like operating system.
-  :small_orange_diamond: HardenedBSD - HardenedBSD aims to implement innovative exploit mitigation and security solutions.
-  :small_orange_diamond: Kali Linux - Linux distribution used for Penetration Testing, Ethical Hacking and network security assessments.
-  :small_orange_diamond: Parrot Security OS - cyber security GNU/Linux environment.
-  :small_orange_diamond: Backbox Linux - penetration test and security assessment oriented Ubuntu-based Linux distribution.
-  :small_orange_diamond: BlackArch - is an Arch Linux-based penetration testing distribution for penetration testers.
-  :small_orange_diamond: Pentoo - is a security-focused livecd based on Gentoo.
-  :small_orange_diamond: Security Onion - Linux distro for intrusion detection, enterprise security monitoring, and log management.
-  :small_orange_diamond: Tails - is a live system that aims to preserve your privacy and anonymity.
-  :small_orange_diamond: vedetta - OpenBSD router boilerplate.
-  :small_orange_diamond: Qubes OS - is a security-oriented OS that uses Xen-based virtualization.
-

- -##### :black_small_square: HTTP(s) Services - -

-  :small_orange_diamond: Varnish Cache - HTTP accelerator designed for content-heavy dynamic web sites.
-  :small_orange_diamond: Nginx - open source web and reverse proxy server that is similar to Apache, but very light weight.
-  :small_orange_diamond: OpenResty - is a dynamic web platform based on NGINX and LuaJIT.
-  :small_orange_diamond: Tengine - a distribution of Nginx with some advanced features.
-  :small_orange_diamond: Caddy Server - is an open source, HTTP/2-enabled web server with HTTPS by default.
-  :small_orange_diamond: HAProxy - the reliable, high performance TCP/HTTP load balancer.
-

- -##### :black_small_square: DNS Services - -

-  :small_orange_diamond: Unbound - validating, recursive, and caching DNS resolver (with TLS).
-  :small_orange_diamond: Knot Resolver - caching full resolver implementation, including both a resolver library and a daemon.
-  :small_orange_diamond: PowerDNS - is an open source authoritative DNS server, written in C++ and licensed under the GPL.
-

- -##### :black_small_square: Other Services - -

-  :small_orange_diamond: 3proxy - tiny free proxy server.
-

- -##### :black_small_square: Security/hardening - -

-  :small_orange_diamond: Emerald Onion - is a 501(c)(3) nonprofit organization and transit internet service provider (ISP).
-  :small_orange_diamond: pi-hole - the Pi-hole® is a DNS sinkhole that protects your devices from unwanted content.
-  :small_orange_diamond: maltrail - malicious traffic detection system.
-  :small_orange_diamond: security_monkey - monitors AWS, GCP, OpenStack, and GitHub orgs for assets and their changes over time.
-  :small_orange_diamond: firecracker - secure and fast microVMs for serverless computing.
-  :small_orange_diamond: streisand - sets up a new server running your choice of WireGuard, OpenSSH, OpenVPN, and more.
-

- -#### Networks  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: Tools - -

-  :small_orange_diamond: CapAnalysis - web visual tool to analyze large amounts of captured network traffic (PCAP analyzer).
-  :small_orange_diamond: netbox - IP address management (IPAM) and data center infrastructure management (DCIM) tool.
-

- -##### :black_small_square: Labs - -

-  :small_orange_diamond: NRE Labs - learn automation by doing it. Right now, right here, in your browser.
-

- -##### :black_small_square: Other - -

-  :small_orange_diamond: LBNL's Network Research Group - home page of the Network Research Group (NRG).
-

- -#### Containers/Orchestration  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: CLI Tools - -

-  :small_orange_diamond: gvisor - container runtime sandbox.
-  :small_orange_diamond: ctop - top-like interface for container metrics.
-

- -##### :black_small_square: Web Tools - -

-  :small_orange_diamond: Moby - a collaborative project for the container ecosystem to assemble container-based system.
-  :small_orange_diamond: Traefik - open source reverse proxy/load balancer provides easier integration with Docker and Let's encrypt.
-  :small_orange_diamond: kong - The Cloud-Native API Gateway.
-  :small_orange_diamond: rancher - complete container management platform.
-  :small_orange_diamond: portainer - making Docker management easy.
-  :small_orange_diamond: nginx-proxy - automated nginx proxy for Docker containers using docker-gen.
-  :small_orange_diamond: bunkerized-nginx - nginx docker image "secure by default".
-

- -##### :black_small_square: Security - -

-  :small_orange_diamond: docker-bench-security - checks for dozens of common best-practices around deploying Docker.
-  :small_orange_diamond: trivy - vulnerability scanner for containers, suitable for CI.
-  :small_orange_diamond: Harbor - cloud native registry project that stores, signs, and scans content.
-  :small_orange_diamond: Houdini - hundreds of offensive and useful docker images for network intrusion.
-

- -##### :black_small_square: Manuals/Tutorials/Best Practices - -

-  :small_orange_diamond: docker-cheat-sheet - a quick reference cheat sheet on Docker.
-  :small_orange_diamond: awesome-docker - a curated list of Docker resources and projects.
-  :small_orange_diamond: docker_practice - learn and understand Docker technologies, with real DevOps practice!
-  :small_orange_diamond: labs - - is a collection of tutorials for learning how to use Docker with various tools.
-  :small_orange_diamond: dockerfiles - various Dockerfiles I use on the desktop and on servers.
-  :small_orange_diamond: kubernetes-the-hard-way - bootstrap Kubernetes the hard way on Google Cloud Platform. No scripts.
-  :small_orange_diamond: kubernetes-the-easy-way - bootstrap Kubernetes the easy way on Google Cloud Platform. No scripts.
-  :small_orange_diamond: cheatsheet-kubernetes-A4 - Kubernetes CheatSheets in A4.
-  :small_orange_diamond: k8s-security - kubernetes security notes and best practices.
-  :small_orange_diamond: kubernetes-production-best-practices - checklists with best-practices for production-ready Kubernetes.
-  :small_orange_diamond: kubernetes-production-best-practices - kubernetes security - best practice guide.
-  :small_orange_diamond: kubernetes-failure-stories - is a compilation of public failure/horror stories related to Kubernetes.
-

- -#### Manuals/Howtos/Tutorials  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: Shell/Command line - -

-  :small_orange_diamond: pure-bash-bible - is a collection of pure bash alternatives to external processes.
-  :small_orange_diamond: pure-sh-bible - is a collection of pure POSIX sh alternatives to external processes.
-  :small_orange_diamond: bash-guide - is a guide to learn bash.
-  :small_orange_diamond: bash-handbook - for those who wanna learn Bash.
-  :small_orange_diamond: The Bash Hackers Wiki - hold documentation of any kind about GNU Bash.
-  :small_orange_diamond: Shell & Utilities - describes the commands offered to application programs by POSIX-conformant systems.
-  :small_orange_diamond: the-art-of-command-line - master the command line, in one page.
-  :small_orange_diamond: Shell Style Guide - a shell style guide for Google-originated open-source projects.
-

- -##### :black_small_square: Text Editors - -

-  :small_orange_diamond: Vim Cheat Sheet - great multi language vim guide.
-

- -##### :black_small_square: Python - -

-  :small_orange_diamond: Awesome Python - a curated list of awesome Python frameworks, libraries, software and resources.
-  :small_orange_diamond: python-cheatsheet - comprehensive Python cheatsheet.
-  :small_orange_diamond: pythoncheatsheet.org - basic reference for beginner and advanced developers.
-

- -##### :black_small_square: Sed & Awk & Other - -

-  :small_orange_diamond: F’Awk Yeah! - advanced sed and awk usage (Parsing for Pentesters 3).
-

- -##### :black_small_square: \*nix & Network - -

-  :small_orange_diamond: nixCraft - linux and unix tutorials for new and seasoned sysadmin.
-  :small_orange_diamond: TecMint - the ideal Linux blog for Sysadmins & Geeks.
-  :small_orange_diamond: Omnisecu - free Networking, System Administration and Security tutorials.
-  :small_orange_diamond: linux-cheat - Linux tutorials and cheatsheets. Minimal examples. Mostly user-land CLI utilities.
-  :small_orange_diamond: linuxupskillchallenge - learn the skills required to sysadmin.
-  :small_orange_diamond: Unix Toolbox - Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users.
-  :small_orange_diamond: Linux Kernel Teaching - is a collection of lectures and labs Linux kernel topics.
-  :small_orange_diamond: htop explained - explanation of everything you can see in htop/top on Linux.
-  :small_orange_diamond: Linux Guide and Hints - tutorials on system administration in Fedora and CentOS.
-  :small_orange_diamond: strace-little-book - a little book which introduces strace.
-  :small_orange_diamond: linux-tracing-workshop - examples and hands-on labs for Linux tracing tools workshops.
-  :small_orange_diamond: http2-explained - a detailed document explaining and documenting HTTP/2.
-  :small_orange_diamond: http3-explained - a document describing the HTTP/3 and QUIC protocols.
-  :small_orange_diamond: HTTP/2 in Action - an excellent introduction to the new HTTP/2 standard.
-  :small_orange_diamond: Let's code a TCP/IP stack - great stuff to learn network and system programming at a deeper level.
-  :small_orange_diamond: Nginx Admin's Handbook - how to improve NGINX performance, security and other important things.
-  :small_orange_diamond: nginxconfig.io - NGINX config generator on steroids.
-  :small_orange_diamond: openssh guideline - is to help operational teams with the configuration of OpenSSH server and client.
-  :small_orange_diamond: SSH Handshake Explained - is a relatively brief description of the SSH handshake.
-  :small_orange_diamond: ISC's Knowledgebase - you'll find some general information about BIND 9, ISC DHCP, and Kea DHCP.
-  :small_orange_diamond: PacketLife.net - a place to record notes while studying for Cisco's CCNP certification.
-

- -##### :black_small_square: Microsoft - -

-  :small_orange_diamond: AD-Attack-Defense - attack and defend active directory using modern post exploitation activity.
-

- -##### :black_small_square: Large-scale systems - -

-  :small_orange_diamond: The System Design Primer - learn how to design large-scale systems.
-  :small_orange_diamond: Awesome Scalability - best practices in building High Scalability, High Availability, High Stability, and more.
-  :small_orange_diamond: Web Architecture 101 - the basic architecture concepts.
-

- -##### :black_small_square: System hardening - -

-  :small_orange_diamond: CIS Benchmarks - secure configuration settings for over 100 technologies, available as a free PDF.
-  :small_orange_diamond: Security Harden CentOS 7 - this walks you through the steps required to security harden CentOS.
-  :small_orange_diamond: CentOS 7 Server Hardening Guide - great guide for hardening CentOS; familiar with OpenSCAP.
-  :small_orange_diamond: awesome-security-hardening - is a collection of security hardening guides, tools and other resources.
-  :small_orange_diamond: The Practical Linux Hardening Guide - provides a high-level overview of hardening GNU/Linux systems.
-  :small_orange_diamond: Linux Hardening Guide - how to harden Linux as much as possible for security and privacy.
-

- -##### :black_small_square: Security & Privacy - -

-  :small_orange_diamond: Hacking Articles - LRaj Chandel's Security & Hacking Blog.
-  :small_orange_diamond: AWS security tools - make your AWS cloud environment more secure.
-  :small_orange_diamond: Rawsec's CyberSecurity Inventory - an inventory of tools and resources about CyberSecurity.
-  :small_orange_diamond: The Illustrated TLS Connection - every byte of a TLS connection explained and reproduced.
-  :small_orange_diamond: SSL Research - SSL and TLS Deployment Best Practices by SSL Labs.
-  :small_orange_diamond: SELinux Game - learn SELinux by doing. Solve Puzzles, show skillz.
-  :small_orange_diamond: Certificates and PKI - everything you should know about certificates and PKI but are too afraid to ask.
-  :small_orange_diamond: The Art of Subdomain Enumeration - a reference for subdomain enumeration techniques.
-  :small_orange_diamond: Quitting Google - the comprehensive guide to quitting Google.
-

- -##### :black_small_square: Web Apps - -

-  :small_orange_diamond: OWASP - worldwide not-for-profit charitable organization focused on improving the security of software.
-  :small_orange_diamond: OWASP ASVS 3.0.1 - OWASP Application Security Verification Standard Project.
-  :small_orange_diamond: OWASP ASVS 3.0.1 Web App - simple web app that helps developers understand the ASVS requirements.
-  :small_orange_diamond: OWASP ASVS 4.0 - is a list of application security requirements or tests.
-  :small_orange_diamond: OWASP Testing Guide v4 - includes a "best practice" penetration testing framework.
-  :small_orange_diamond: OWASP Dev Guide - this is the development version of the OWASP Developer Guide.
-  :small_orange_diamond: OWASP WSTG - is a comprehensive open source guide to testing the security of web apps.
-  :small_orange_diamond: OWASP API Security Project - focuses specifically on the top ten vulnerabilities in API security.
-  :small_orange_diamond: Mozilla Web Security - help operational teams with creating secure web applications.
-  :small_orange_diamond: security-bulletins - security bulletins that relate to Netflix Open Source.
-  :small_orange_diamond: API-Security-Checklist - security countermeasures when designing, testing, and releasing your API.
-  :small_orange_diamond: Enable CORS - enable cross-origin resource sharing.
-  :small_orange_diamond: Application Security Wiki - is an initiative to provide all application security related resources at one place.
-  :small_orange_diamond: Weird Proxies - reverse proxy related attacks; it is a result of analysis of various proxies.
-  :small_orange_diamond: Webshells - great series about malicious payloads.
-  :small_orange_diamond: Practical Web Cache Poisoning - show you how to compromise websites by using esoteric web features.
-  :small_orange_diamond: Hidden directories and files - as a source of sensitive information about web application.
-  :small_orange_diamond: Explosive blog - great blog about cybersec and pentests.
-  :small_orange_diamond: Security Cookies - this paper will take a close look at cookie security.
-  :small_orange_diamond: APISecurityBestPractices - help you keep secrets (API keys, db credentials, certificates) out of source code.
-

- -##### :black_small_square: All-in-one - -

-  :small_orange_diamond: LZone Cheat Sheets - all cheat sheets.
-  :small_orange_diamond: Dan’s Cheat Sheets’s - massive cheat sheets documentation.
-  :small_orange_diamond: Rico's cheatsheets - this is a modest collection of cheatsheets.
-  :small_orange_diamond: DevDocs API - combines multiple API documentations in a fast, organized, and searchable interface.
-  :small_orange_diamond: cheat.sh - the only cheat sheet you need.
-  :small_orange_diamond: gnulinux.guru - collection of cheat sheets about bash, vim and networking.
-  :small_orange_diamond: Web Skills - visual overview of useful skills to learn as a web developer.
-

- -##### :black_small_square: Ebooks - -

-  :small_orange_diamond: free-programming-books - list of free learning resources in many languages.
-

- -##### :black_small_square: Other - -

-  :small_orange_diamond: CTF Series : Vulnerable Machines - the steps below could be followed to find vulnerabilities and exploits.
-  :small_orange_diamond: 50M_CTF_Writeup - $50 million CTF from Hackerone - writeup.
-  :small_orange_diamond: ctf-tasks - an archive of low-level CTF challenges developed over the years.
-  :small_orange_diamond: How to start RE/malware analysis? - collection of some hints and useful links for the beginners.
-  :small_orange_diamond: The C10K problem - it's time for web servers to handle ten thousand clients simultaneously, don't you think?
-  :small_orange_diamond: How 1500 bytes became the MTU of the internet - great story about the Maximum Transmission Unit.
-  :small_orange_diamond: poor man's profiler - like dtrace's don't really provide methods to see what programs are blocking on.
-  :small_orange_diamond: HTTPS on Stack Overflow - this is the story of a long journey regarding the implementation of SSL.
-  :small_orange_diamond: Julia's Drawings - some drawings about programming and unix world, zines about systems & debugging tools.
-  :small_orange_diamond: Hash collisions - this great repository is focused on hash collisions exploitation.
-  :small_orange_diamond: sha256-animation - animation of the SHA-256 hash function in your terminal.
-  :small_orange_diamond: sha256algorithm - sha256 algorithm explained online step by step visually.
-  :small_orange_diamond: BGP Meets Cat - after 3072 hours of manipulating BGP, Job Snijders has succeeded in drawing a Nyancat.
-  :small_orange_diamond: bgp-battleships - playing battleships over BGP.
-  :small_orange_diamond: What happens when... - you type google.com into your browser and press enter?
-  :small_orange_diamond: how-web-works - based on the 'What happens when...' repository.
-  :small_orange_diamond: HTTPS in the real world - great tutorial explain how HTTPS works in the real world.
-  :small_orange_diamond: Gitlab and NFS bug - how we spent two weeks hunting an NFS bug in the Linux kernel.
-  :small_orange_diamond: Gitlab melts down - postmortem on the database outage of January 31 2017 with the lessons we learned.
-  :small_orange_diamond: How To Become A Hacker - if you want to be a hacker, keep reading.
-  :small_orange_diamond: Operation Costs in CPU - should help to estimate costs of certain operations in CPU clocks.
-  :small_orange_diamond: Let's Build a Simple Database - writing a sqlite clone from scratch in C.
-  :small_orange_diamond: simple-computer - great resource to understand how computers work under the hood.
-  :small_orange_diamond: The story of "Have I been pwned?" - working with 154 million records on Azure Table Storage.
-  :small_orange_diamond: TOP500 Supercomputers - shows the 500 most powerful commercially available computer systems known to us.
-  :small_orange_diamond: How to build a 8 GPU password cracker - any "black magic" or hours of frustration like desktop components do.
-  :small_orange_diamond: CERN Data Centre - 3D visualizations of the CERN computing environments (and more).
-  :small_orange_diamond: How fucked is my database - evaluate how fucked your database is with this handy website.
-  :small_orange_diamond: Linux Troubleshooting 101 , 2016 Edition - everything is a DNS Problem...
-  :small_orange_diamond: Five Whys - you know what the problem is, but you cannot solve it?
-  :small_orange_diamond: Maersk, me & notPetya - how did ransomware successfully hijack hundreds of domain controllers?
-  :small_orange_diamond: howhttps.works - how HTTPS works ...in a comic!
-  :small_orange_diamond: howdns.works - a fun and colorful explanation of how DNS works.
-  :small_orange_diamond: POSTGRESQLCO.NF - your postgresql.conf documentation and recommendations.
-

- -#### Inspiring Lists  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: SysOps/DevOps - -

-  :small_orange_diamond: Awesome Sysadmin - amazingly awesome open source sysadmin resources.
-  :small_orange_diamond: Awesome Shell - awesome command-line frameworks, toolkits, guides and gizmos.
-  :small_orange_diamond: Command-line-text-processing - finding text to search and replace, sorting to beautifying, and more.
-  :small_orange_diamond: Awesome Pcaptools - collection of tools developed by other researchers to process network traces.
-  :small_orange_diamond: awesome-ebpf - a curated list of awesome projects related to eBPF.
-  :small_orange_diamond: Linux Network Performance - where some of the network sysctl variables fit into the Linux/Kernel network flow.
-  :small_orange_diamond: Awesome Postgres - list of awesome PostgreSQL software, libraries, tools and resources.
-  :small_orange_diamond: quick-SQL-cheatsheet - a quick reminder of all SQL queries and examples on how to use them.
-  :small_orange_diamond: Awesome-Selfhosted - list of Free Software network services and web applications which can be hosted locally.
-  :small_orange_diamond: List of applications - huge list of apps sorted by category, as a reference for those looking for packages.
-  :small_orange_diamond: CS-Interview-Knowledge-Map - build the best interview map.
-  :small_orange_diamond: DevOps-Guide - DevOps Guide from basic to advanced with Interview Questions and Notes.
-  :small_orange_diamond: FreeBSD Journal - it is a great list of periodical magazines about FreeBSD and other important things.
-  :small_orange_diamond: devops-interview-questions - contains interview questions on various DevOps and SRE related topics.

- -##### :black_small_square: Developers - -

-  :small_orange_diamond: Web Developer Roadmap - roadmaps, articles and resources to help you choose your path, learn and improve.
-  :small_orange_diamond: Front-End-Checklist - the perfect Front-End Checklist for modern websites and meticulous developers.
-  :small_orange_diamond: Front-End-Performance-Checklist - Front-End Performance Checklist that runs faster than the others.
-  :small_orange_diamond: Python's Magic Methods - what are magic methods? They're everything in object-oriented Python.
-  :small_orange_diamond: wtfpython - a collection of surprising Python snippets and lesser-known features.
-  :small_orange_diamond: js-dev-reads - a list of books and articles for the discerning web developer to read.
-  :small_orange_diamond: Commit messages guide - a guide to understand the importance of commit messages.
-

- -##### :black_small_square: Security/Pentesting - -

-  :small_orange_diamond: Awesome Web Security - a curated list of Web Security materials and resources.
-  :small_orange_diamond: awesome-cyber-skills - a curated list of hacking environments where you can train your cyber skills.
-  :small_orange_diamond: awesome-devsecops - an authoritative list of awesome devsecops tools.
-  :small_orange_diamond: awesome-osint - is a curated list of amazingly awesome OSINT.
-  :small_orange_diamond: HolyTips - tips and tutorials on Bug Bounty Hunting and Web App Security.
-  :small_orange_diamond: awesome-threat-intelligence - a curated list of Awesome Threat Intelligence resources.
-  :small_orange_diamond: Red-Teaming-Toolkit - a collection of open source and commercial tools that aid in red team operations.
-  :small_orange_diamond: awesome-burp-extensions - a curated list of amazingly awesome Burp Extensions.
-  :small_orange_diamond: Free Security eBooks - list of a Free Security and Hacking eBooks.
-  :small_orange_diamond: Hacking-Security-Ebooks - top 100 Hacking & Security E-Books.
-  :small_orange_diamond: privacy-respecting - curated list of privacy respecting services and software.
-  :small_orange_diamond: reverse-engineering - list of awesome reverse engineering resources.
-  :small_orange_diamond: linux-re-101 - a collection of resources for linux reverse engineering.
-  :small_orange_diamond: reverseengineering-reading-list - a list of Reverse Engineering articles, books, and papers.
-  :small_orange_diamond: Awesome-WAF - a curated list of awesome web-app firewall (WAF) stuff.
-  :small_orange_diamond: awesome-shodan-queries - interesting, funny, and depressing search queries to plug into shodan.io.
-  :small_orange_diamond: RobotsDisallowed - a curated list of the most common and most interesting robots.txt disallowed directories.
-  :small_orange_diamond: HackingNeuralNetworks - is a small course on exploiting and defending neural networks.
-  :small_orange_diamond: wildcard-certificates - why you probably shouldn't use a wildcard certificate.
-  :small_orange_diamond: Don't use VPN services - which is what every third-party "VPN provider" does.
-  :small_orange_diamond: awesome-yara - a curated list of awesome YARA rules, tools, and people.
-  :small_orange_diamond: macOS-Security-and-Privacy-Guide - guide to securing and improving privacy on macOS.
-  :small_orange_diamond: macos_security - macOS Security Compliance Project.
-  :small_orange_diamond: awesome-sec-talks - is a collected list of awesome security talks.
-  :small_orange_diamond: Movies for Hackers - list of movies every hacker & cyberpunk must watch.
-  :small_orange_diamond: Cryptography_1 - materials used whilst taking Prof. Dan Boneh Stanford Crypto course.
-  :small_orange_diamond: Crypton - library to learn and practice Offensive and Defensive Cryptography.
-

- -##### :black_small_square: Other - -

-  :small_orange_diamond: Cheatography - over 3,000 free cheat sheets, revision aids and quick references.
-  :small_orange_diamond: awesome-static-analysis - static analysis tools for all programming languages.
-  :small_orange_diamond: computer-science - path to a free self-taught education in Computer Science.
-  :small_orange_diamond: post-mortems - is a collection of postmortems (config errors, hardware failures, and more).
-  :small_orange_diamond: build-your-own-x - build your own (insert technology here).
-  :small_orange_diamond: Project-Based-Tutorials-in-C - is a curated list of project-based tutorials in C.
-  :small_orange_diamond: The-Documentation-Compendium - various README templates & tips on writing high-quality documentation.
-  :small_orange_diamond: awesome-python-applications - free software that works great, and also happens to be open-source Python.
-  :small_orange_diamond: awesome-public-datasets - a topic-centric list of HQ open datasets.
-  :small_orange_diamond: machine-learning-algorithms - a curated list of all machine learning algorithms and concepts.
-

- -#### Blogs/Podcasts/Videos  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: SysOps/DevOps - -

-  :small_orange_diamond: Varnish for PHP developers - very interesting presentation of Varnish by Mattias Geniar.
-  :small_orange_diamond: A Netflix Guide to Microservices - talks about the chaotic and vibrant world of microservices at Netflix.
-

- -##### :black_small_square: Developers - -

-  :small_orange_diamond: Comparing C to machine lang - compare a simple C app with the compiled machine code of that program.
-

- -##### :black_small_square: Geeky Persons - -

-  :small_orange_diamond: Brendan Gregg's Blog - is an industry expert in computing performance and cloud computing.
-  :small_orange_diamond: Gynvael "GynDream" Coldwind - is a IT security engineer at Google.
-  :small_orange_diamond: Michał "lcamtuf" Zalewski - white hat hacker, computer security expert.
-  :small_orange_diamond: Mattias Geniar - developer, sysadmin, blogger, podcaster and public speaker.
-  :small_orange_diamond: Nick Craver - software developer and systems administrator for Stack Exchange.
-  :small_orange_diamond: Scott Helme - security researcher, speaker and founder of securityheaders.com and report-uri.com.
-  :small_orange_diamond: Brian Krebs - The Washington Post and now an Independent investigative journalist.
-  :small_orange_diamond: Bruce Schneier - is an internationally renowned security technologist, called a "security guru".
-  :small_orange_diamond: Chrissy Morgan - advocate of practical learning, Chrissy also takes part in bug bounty programs.
-  :small_orange_diamond: Andy Gill - is a hacker at heart who works as a senior penetration tester.
-  :small_orange_diamond: Daniel Miessler - cybersecurity expert and writer.
-  :small_orange_diamond: Samy Kamkar - is an American privacy and security researcher, computer hacker.
-  :small_orange_diamond: Javvad Malik - is a security advocate at AlienVault, a blogger event speaker and industry commentator.
-  :small_orange_diamond: Graham Cluley - public speaker and independent computer security analyst.
-  :small_orange_diamond: Kacper Szurek - detection engineer at ESET.
-  :small_orange_diamond: Troy Hunt - web security expert known for public education and outreach on security topics.
-  :small_orange_diamond: raymii.org - sysadmin specializing in building high availability cloud environments.
-  :small_orange_diamond: Robert Penz - IT security expert.
-

- -##### :black_small_square: Geeky Blogs - -

-  :small_orange_diamond: Linux Audit - the Linux security blog about auditing, hardening and compliance by Michael Boelen.
-  :small_orange_diamond: -Linux Security Expert - trainings, howtos, checklists, security tools, and more.
-  :small_orange_diamond: The Grymoire - collection of useful incantations for wizards, be you computer wizards, magicians, or whatever.
-  :small_orange_diamond: Secjuice - is the only non-profit, independent and volunteer led publication in the information security space.
-  :small_orange_diamond: Decipher - security news that informs and inspires.
-

- -##### :black_small_square: Geeky Vendor Blogs - -

-  :small_orange_diamond: Tenable Podcast - conversations and interviews related to Cyber Exposure, and more.
-  :small_orange_diamond: Sophos - threat news room, giving you news, opinion, advice and research on computer security issues.
-  :small_orange_diamond: Tripwire State of Security - blog featuring the latest news, trends and insights on current security issues.
-  :small_orange_diamond: Malwarebytes Labs Blog - security blog aims to provide insider news about cybersecurity.
-  :small_orange_diamond: TrustedSec - latest news, and trends about cybersecurity.
-  :small_orange_diamond: PortSwigger Web Security Blog - about web app security vulns and top tips from our team of web security.
-  :small_orange_diamond: AT&T Cybersecurity blog - news on emerging threats and practical advice to simplify threat detection.
-  :small_orange_diamond: Thycotic - where CISOs and IT Admins come to learn about industry trends, IT security, and more.
-

- -##### :black_small_square: Geeky Cybersecurity Podcasts - -

-  :small_orange_diamond: Risky Business - is a weekly information security podcast featuring news and in-depth interviews.
-  :small_orange_diamond: Cyber, by Motherboard - stories, and focus on the ideas about cybersecurity.
-  :small_orange_diamond: Tenable Podcast - conversations and interviews related to Cyber Exposure, and more.
-  :small_orange_diamond: -Cybercrime Investigations - podcast by Geoff White about cybercrimes.
-  :small_orange_diamond: The many hats club - featuring stories from a wide range of Infosec people (Whitehat, Greyhat and Blackhat).
-  :small_orange_diamond: Darknet Diaries - true stories from the dark side of the Internet.
-  :small_orange_diamond: OSINTCurious Webcasts - is the investigative curiosity that helps people be successful in OSINT.
-  :small_orange_diamond: Security Weekly - the latest information security and hacking news.
-

- -##### :black_small_square: Geeky Cybersecurity Video Blogs - -

-  :small_orange_diamond: rev3rse security - offensive, binary exploitation, web app security, hardening, red team, blue team.
-  :small_orange_diamond: LiveOverflow - a lot more advanced topics than what is typically offered in paid online courses - but for free.
-  :small_orange_diamond: J4vv4D - the important information regarding our internet security.
-  :small_orange_diamond: -CyberTalks - talks, interviews, and article about cybersecurity.
-

- -##### :black_small_square: Best Personal Twitter Accounts - -

-  :small_orange_diamond: @blackroomsec - a white-hat hacker/pentester. Intergalactic Minesweeper Champion 1990.
-  :small_orange_diamond: @MarcoCiappelli - Co-Founder @ITSPmagazine, at the intersection of IT security and society.
-  :small_orange_diamond: @binitamshah - Linux Evangelist. Malwares. Kernel Dev. Security Enthusiast.
-  :small_orange_diamond: @joe_carson - an InfoSec Professional and Tech Geek.
-  :small_orange_diamond: @mikko - CRO at F-Secure, Reverse Engineer, TED Speaker, Supervillain.
-  :small_orange_diamond: @esrtweet - often referred to as ESR, is an American software developer, and open-source software advocate.
-  :small_orange_diamond: @gynvael - security researcher/programmer, @DragonSectorCTF founder/player, technical streamer.
-  :small_orange_diamond: @x0rz - Security Researcher & Cyber Observer.
-  :small_orange_diamond: @hasherezade - programmer, malware analyst. Author of PEbear, PEsieve, libPeConv.
-  :small_orange_diamond: @TinkerSec - tinkerer, cypherpunk, hacker.
-  :small_orange_diamond: @alisaesage - independent hacker and researcher.
-  :small_orange_diamond: @SwiftOnSecurity - systems security, industrial safety, sysadmin, author of decentsecurity.com.
-  :small_orange_diamond: @dakami - is one of just seven people with the authority to restore the DNS root keys.
-  :small_orange_diamond: @samykamkar - is a famous "grey hat" hacker, security researcher, creator of the MySpace "Samy" worm.
-  :small_orange_diamond: @securityweekly - founder & CTO of Security Weekly podcast network.
-  :small_orange_diamond: @jack_daniel - @SecurityBSides co-founder.
-  :small_orange_diamond: @thegrugq - Security Researcher.
-  :small_orange_diamond: @matthew_d_green - a cryptographer and professor at Johns Hopkins University.
-

- -##### :black_small_square: Best Commercial Twitter Accounts - -

-  :small_orange_diamond: @haveibeenpwned - check if you have an account that has been compromised in a data breach.
-  :small_orange_diamond: @bugcrowd - trusted by more of the Fortune 500 than any other crowdsourced security platform.
-  :small_orange_diamond: @Malwarebytes - most trusted security company. Unmatched threat visibility.
-  :small_orange_diamond: @sansforensics - the world's leading Digital Forensics and Incident Response provider.
-  :small_orange_diamond: @attcyber - AT&T Cybersecurity’s Edge-to-Edge technologies provide threat intelligence, and more.
-  :small_orange_diamond: @TheManyHatsClub - an information security focused podcast and group of individuals from all walks of life.
-  :small_orange_diamond: @hedgehogsec - Hedgehog Cyber. Gibraltar and Manchester's top boutique information security firm.
-  :small_orange_diamond: @NCSC - the National Cyber Security Centre. Helping to make the UK the safest place to live and work online.
-  :small_orange_diamond: @Synacktiv - IT security experts.
-

- -##### :black_small_square: A piece of history - -

-  :small_orange_diamond: How to Do Things at ARL - how to configure modems, scan images, record CD-ROMs, and other.*
-

- -##### :black_small_square: Other - -

-  :small_orange_diamond: Diffie-Hellman Key Exchange (short version) - how Diffie-Hellman Key Exchange worked.
-

- -#### Hacking/Penetration Testing  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: Pentesters arsenal tools - -

-  :small_orange_diamond: Sandcat Browser - a penetration-oriented browser with plenty of advanced functionality already built in.
-  :small_orange_diamond: Metasploit - tool and framework for pentesting system, web and many more, contains a lot a ready to use exploit.
-  :small_orange_diamond: Burp Suite - tool for testing web app security, intercepting proxy to replay, inject, scan and fuzz.
-  :small_orange_diamond: OWASP Zed Attack Proxy - intercepting proxy to replay, inject, scan and fuzz HTTP requests.
-  :small_orange_diamond: w3af - is a Web Application Attack and Audit Framework.
-  :small_orange_diamond: mitmproxy - an interactive TLS-capable intercepting HTTP proxy for penetration testers.
-  :small_orange_diamond: Nikto2 - web server scanner which performs comprehensive tests against web servers for multiple items.
-  :small_orange_diamond: sqlmap - tool that automates the process of detecting and exploiting SQL injection flaws.
-  :small_orange_diamond: Recon-ng - is a full-featured Web Reconnaissance framework written in Python.
-  :small_orange_diamond: AutoRecon - is a network reconnaissance tool which performs automated enumeration of services.
-  :small_orange_diamond: Faraday - an Integrated Multiuser Pentest Environment.
-  :small_orange_diamond: Photon - incredibly fast crawler designed for OSINT.
-  :small_orange_diamond: XSStrike - most advanced XSS detection suite.
-  :small_orange_diamond: Sn1per - automated pentest framework for offensive security experts.
-  :small_orange_diamond: vuls - is an agent-less vulnerability scanner for Linux, FreeBSD, and other.
-  :small_orange_diamond: tsunami - is a general purpose network security scanner with an extensible plugin system.
-  :small_orange_diamond: aquatone - a tool for domain flyovers.
-  :small_orange_diamond: BillCipher - information gathering tool for a website or IP address.
-  :small_orange_diamond: WhatWaf - detect and bypass web application firewalls and protection systems.
-  :small_orange_diamond: Corsy - CORS misconfiguration scanner.
-  :small_orange_diamond: Raccoon - is a high performance offensive security tool for reconnaissance and vulnerability scanning.
-  :small_orange_diamond: dirhunt - find web directories without bruteforce.
-  :small_orange_diamond: John The Ripper - is a fast password cracker, currently available for many flavors of Unix, Windows, and other.
-  :small_orange_diamond: hashcat - world's fastest and most advanced password recovery utility.
-  :small_orange_diamond: p0f - is a tool to identify the players behind any incidental TCP/IP communications.
-  :small_orange_diamond: ssh_scan - a prototype SSH configuration and policy scanner.
-  :small_orange_diamond: LeakLooker - find open databases - powered by Binaryedge.io
-  :small_orange_diamond: exploitdb - searchable archive from The Exploit Database.
-  :small_orange_diamond: getsploit - is a command line utility for searching and downloading exploits.
-  :small_orange_diamond: ctf-tools - some setup scripts for security research tools.
-  :small_orange_diamond: pwntools - CTF framework and exploit development library.
-  :small_orange_diamond: security-tools - collection of small security tools created mostly in Python. CTFs, pentests and so on.
-  :small_orange_diamond: pentestpackage - is a package of Pentest scripts.
-  :small_orange_diamond: python-pentest-tools - python tools for penetration testers.
-  :small_orange_diamond: fuzzdb - dictionary of attack patterns and primitives for black-box application fault injection.
-  :small_orange_diamond: AFL - is a free software fuzzer maintained by Google.
-  :small_orange_diamond: AFL++ - is AFL with community patches.
-  :small_orange_diamond: syzkaller - is an unsupervised, coverage-guided kernel fuzzer.
-  :small_orange_diamond: pwndbg - exploit development and reverse engineering with GDB made easy.
-  :small_orange_diamond: GDB PEDA - Python Exploit Development Assistance for GDB.
-  :small_orange_diamond: IDA - multi-processor disassembler and debugger useful for reverse engineering malware.
-  :small_orange_diamond: radare2 - framework for reverse-engineering and analyzing binaries.
-  :small_orange_diamond: routersploit - exploitation framework for embedded devices.
-  :small_orange_diamond: Ghidra - is a software reverse engineering (SRE) framework.
-  :small_orange_diamond: Cutter - is an SRE platform integrating Ghidra's decompiler.
-  :small_orange_diamond: Vulnreport - open-source pentesting management and automation platform by Salesforce Product Security.
-  :small_orange_diamond: Mentalist - is a graphical tool for custom wordlist generation.
-  :small_orange_diamond: archerysec - vulnerability assessment and management helps to perform scans and manage vulnerabilities.
-  :small_orange_diamond: Osmedeus - fully automated offensive security tool for reconnaissance and vulnerability scanning.
-  :small_orange_diamond: beef - the browser exploitation framework project.
-  :small_orange_diamond: AutoSploit - automated mass exploiter.
-  :small_orange_diamond: SUDO_KILLER - is a tool to identify and exploit sudo rules' misconfigurations and vulnerabilities.
-  :small_orange_diamond: yara - the pattern matching swiss knife.
-  :small_orange_diamond: mimikatz - a little tool to play with Windows security.
-  :small_orange_diamond: sherlock - hunt down social media accounts by username across social networks.
-  :small_orange_diamond: OWASP Threat Dragon - is a tool used to create threat model diagrams and to record possible threats.
-

- -##### :black_small_square: Pentests bookmarks collection - -

-  :small_orange_diamond: PTES - the penetration testing execution standard.
-  :small_orange_diamond: Pentests MindMap - amazing mind map with vulnerable apps and systems.
-  :small_orange_diamond: WebApps Security Tests MindMap - incredible mind map for WebApps security tests.
-  :small_orange_diamond: Brute XSS - master the art of Cross Site Scripting.
-  :small_orange_diamond: XSS cheat sheet - contains many vectors that can help you bypass WAFs and filters.
-  :small_orange_diamond: Offensive Security Bookmarks - security bookmarks collection, all things that author need to pass OSCP.
-  :small_orange_diamond: Awesome Pentest Cheat Sheets - collection of the cheat sheets useful for pentesting.
-  :small_orange_diamond: Awesome Hacking by HackWithGithub - awesome lists for hackers, pentesters and security researchers.
-  :small_orange_diamond: Awesome Hacking by carpedm20 - a curated list of awesome hacking tutorials, tools and resources.
-  :small_orange_diamond: Awesome Hacking Resources - collection of hacking/penetration testing resources to make you better.
-  :small_orange_diamond: Awesome Pentest - collection of awesome penetration testing resources, tools and other shiny things.
-  :small_orange_diamond: Awesome-Hacking-Tools - is a curated list of awesome Hacking Tools.
-  :small_orange_diamond: Hacking Cheat Sheet - author hacking and pentesting notes.
-  :small_orange_diamond: blackhat-arsenal-tools - official Black Hat arsenal security tools repository.
-  :small_orange_diamond: Penetration Testing and WebApp Cheat Sheets - the complete list of Infosec related cheat sheets.
-  :small_orange_diamond: Cyber Security Resources - includes thousands of cybersecurity-related references and resources.
-  :small_orange_diamond: Pentest Bookmarks - there are a LOT of pentesting blogs.
-  :small_orange_diamond: Cheatsheet-God - Penetration Testing Reference Bank - OSCP/PTP & PTX Cheatsheet.
-  :small_orange_diamond: ThreatHunter-Playbook - to aid the development of techniques and hypothesis for hunting campaigns.
-  :small_orange_diamond: Beginner-Network-Pentesting - notes for beginner network pentesting course.
-  :small_orange_diamond: OSCPRepo - is a list of resources that author have been gathering in preparation for the OSCP.
-  :small_orange_diamond: PayloadsAllTheThings - a list of useful payloads and bypass for Web Application Security and Pentest/CTF.
-  :small_orange_diamond: payloads - git all the Payloads! A collection of web attack payloads.
-  :small_orange_diamond: command-injection-payload-list - command injection payload list.
-  :small_orange_diamond: Awesome Shodan Search Queries - great search queries to plug into Shodan.
-  :small_orange_diamond: AwesomeXSS - is a collection of Awesome XSS resources.
-  :small_orange_diamond: php-webshells - common php webshells.
-  :small_orange_diamond: Pentesting Tools Cheat Sheet - a quick reference high level overview for typical penetration testing.
-  :small_orange_diamond: OWASP Cheat Sheet Series - is a collection of high value information on specific application security topics.
-  :small_orange_diamond: OWASP dependency-check - is an open source solution the OWASP Top 10 2013 entry.
-  :small_orange_diamond: OWASP ProActive Controls - OWASP Top 10 Proactive Controls 2018.
-  :small_orange_diamond: PENTESTING-BIBLE - hacking & penetration testing & red team & cyber security resources.
-  :small_orange_diamond: pentest-wiki - is a free online security knowledge library for pentesters/researchers.
-  :small_orange_diamond: DEF CON Media Server - great stuff from DEFCON.
-  :small_orange_diamond: Awesome Malware Analysis - a curated list of awesome malware analysis tools and resources.
-  :small_orange_diamond: SQL Injection Cheat Sheet - detailed technical stuff about the many different variants of the SQL Injection.
-  :small_orange_diamond: Entersoft Knowledge Base - great and detailed reference about vulnerabilities.
-  :small_orange_diamond: HTML5 Security Cheatsheet - a collection of HTML5 related XSS attack vectors.
-  :small_orange_diamond: XSS String Encoder - for generating XSS code to check your input validation filters against XSS.
-  :small_orange_diamond: GTFOBins - list of Unix binaries that can be exploited by an attacker to bypass local security restrictions.
-  :small_orange_diamond: Guifre Ruiz Notes - collection of security, system, network and pentest cheatsheets.
-  :small_orange_diamond: SSRF Tips - a collection of SSRF Tips.
-  :small_orange_diamond: shell-storm repo CTF - great archive of CTFs.
-  :small_orange_diamond: ctf - CTF (Capture The Flag) writeups, code snippets, notes, scripts.
-  :small_orange_diamond: My-CTF-Web-Challenges - collection of CTF Web challenges.
-  :small_orange_diamond: MSTG - The Mobile Security Testing Guide (MSTG) is a comprehensive manual for mobile app security testing.
-  :small_orange_diamond: Internal-Pentest-Playbook - notes on the most common things for an Internal Network Penetration Test.
-  :small_orange_diamond: KeyHacks - shows quick ways in which API keys leaked by a bug bounty program can be checked.
-  :small_orange_diamond: securitum/research - various Proof of Concepts of security research performed by Securitum.
-  :small_orange_diamond: public-pentesting-reports - is a list of public pentest reports released by several consulting security groups.
-  :small_orange_diamond: awesome-bug-bounty - is a comprehensive curated list of available Bug Bounty.
-  :small_orange_diamond: bug-bounty-reference - is a list of bug bounty write-ups.
-  :small_orange_diamond: Awesome-Bugbounty-Writeups - is a curated list of bugbounty writeups.
-  :small_orange_diamond: Bug bounty writeups - list of bug bounty writeups (2012-2020).
-  :small_orange_diamond: hackso.me - a great journey into security.
-

- -##### :black_small_square: Backdoors/exploits - -

-  :small_orange_diamond: PHP-backdoors - a collection of PHP backdoors. For educational or testing purposes only.
-

- -##### :black_small_square: Wordlists and Weak passwords - -

-  :small_orange_diamond: Weakpass - for any kind of bruteforce find wordlists or unleash the power of them all at once!
-  :small_orange_diamond: Hashes.org - is a free online hash resolving service incorporating many unparalleled techniques.
-  :small_orange_diamond: SecLists - collection of multiple types of lists used during security assessments, collected in one place.
-  :small_orange_diamond: Probable-Wordlists - sorted by probability originally created for password generation and testing.
-  :small_orange_diamond: skullsecurity passwords - password dictionaries and leaked passwords repository.
-  :small_orange_diamond: Polish PREMIUM Dictionary - official dictionary created by the team on the forum bezpieka.org.* 1
-  :small_orange_diamond: statistically-likely-usernames - wordlists for creating statistically likely username lists.
-

- -##### :black_small_square: Bounty platforms - -

-  :small_orange_diamond: YesWeHack - bug bounty platform with infosec jobs.
-  :small_orange_diamond: Openbugbounty - allows any security researcher reporting a vulnerability on any website.
-  :small_orange_diamond: hackerone - global hacker community to surface the most relevant security issues.
-  :small_orange_diamond: bugcrowd - crowdsourced cybersecurity for the enterprise.
-  :small_orange_diamond: Crowdshield - crowdsourced security & bug bounty management.
-  :small_orange_diamond: Synack - crowdsourced security & bug bounty programs, crowd security intelligence platform, and more.
-  :small_orange_diamond: Hacktrophy - bug bounty platform.
-

- -##### :black_small_square: Web Training Apps (local installation) - -

-  :small_orange_diamond: OWASP-VWAD - comprehensive and well maintained registry of all known vulnerable web applications.
-  :small_orange_diamond: DVWA - PHP/MySQL web application that is damn vulnerable.
-  :small_orange_diamond: metasploitable2 - vulnerable web application amongst security researchers.
-  :small_orange_diamond: metasploitable3 - is a VM that is built from the ground up with a large amount of security vulnerabilities.
-  :small_orange_diamond: DSVW - is a deliberately vulnerable web application written in under 100 lines of code.
-  :small_orange_diamond: OWASP Mutillidae II - free, open source, deliberately vulnerable web-application.
-  :small_orange_diamond: OWASP Juice Shop Project - the most bug-free vulnerable application in existence.
-  :small_orange_diamond: OWASP Node js Goat Project - OWASP Top 10 security risks apply to web apps developed using Node.js.
-  :small_orange_diamond: juicy-ctf - run Capture the Flags and Security Trainings with OWASP Juice Shop.
-  :small_orange_diamond: SecurityShepherd - web and mobile application security training platform.
-  :small_orange_diamond: Security Ninjas - open source application security training program.
-  :small_orange_diamond: hackazon - a modern vulnerable web app.
-  :small_orange_diamond: dvna - damn vulnerable NodeJS application.
-  :small_orange_diamond: django-DefectDojo - is an open-source application vulnerability correlation and security orchestration tool.
-  :small_orange_diamond: Google Gruyere - web application exploits and defenses.
-  :small_orange_diamond: Bodhi - is a playground focused on learning the exploitation of client-side web vulnerabilities.
-  :small_orange_diamond: Websploit - single vm lab with the purpose of combining several vulnerable appliations in one environment.
-  :small_orange_diamond: vulhub - pre-built Vulnerable Environments based on docker-compose.
-  :small_orange_diamond: CloudGoat 2 - the new & improved "Vulnerable by Design" -AWS deployment tool.
-  :small_orange_diamond: secDevLabs - is a laboratory for learning secure web development in a practical manner.
-  :small_orange_diamond: CORS-vulnerable-Lab - sample vulnerable code and its exploit code.
-  :small_orange_diamond: RootTheBox - a Game of Hackers (CTF Scoreboard & Game Manager).
-  :small_orange_diamond: KONTRA - application security training (OWASP Top Web & Api).
-

- -##### :black_small_square: Labs (ethical hacking platforms/trainings/CTFs) - -

-  :small_orange_diamond: Offensive Security - true performance-based penetration testing training for over a decade.
-  :small_orange_diamond: Hack The Box - online platform allowing you to test your penetration testing skills.
-  :small_orange_diamond: Hacking-Lab - online ethical hacking, computer network and security challenge platform.
-  :small_orange_diamond: pwnable.kr - non-commercial wargame site which provides various pwn challenges.
-  :small_orange_diamond: Pwnable.tw - is a wargame site for hackers to test and expand their binary exploiting skills.
-  :small_orange_diamond: picoCTF - is a free computer security game targeted at middle and high school students.
-  :small_orange_diamond: CTFlearn - is an online platform built to help ethical hackers learn and practice their cybersecurity knowledge.
-  :small_orange_diamond: ctftime - CTF archive and a place, where you can get some another CTF-related info.
-  :small_orange_diamond: Silesia Security Lab - high quality security testing services.
-  :small_orange_diamond: Practical Pentest Labs - pentest lab, take your Hacking skills to the next level.
-  :small_orange_diamond: Root Me - the fast, easy, and affordable way to train your hacking skills.
-  :small_orange_diamond: rozwal.to - a great platform to train your pentesting skills.
-  :small_orange_diamond: TryHackMe - learning Cyber Security made easy.
-  :small_orange_diamond: hackxor - is a realistic web application hacking game, designed to help players of all abilities develop their skills.
-  :small_orange_diamond: Hack Yourself First - it's full of nasty app sec holes.
-  :small_orange_diamond: OverTheWire - can help you to learn and practice security concepts in the form of fun-filled games.
-  :small_orange_diamond: Wizard Labs - is an online Penetration Testing Lab.
-  :small_orange_diamond: PentesterLab - provides vulnerable systems that can be used to test and understand vulnerabilities.
-  :small_orange_diamond: RingZer0 - tons of challenges designed to test and improve your hacking skills.
-  :small_orange_diamond: try2hack - several security-oriented challenges for your entertainment.
-  :small_orange_diamond: Ubeeri - preconfigured lab environments.
-  :small_orange_diamond: Pentestit - emulate IT infrastructures of real companies for legal pen testing and improving pentest skills.
-  :small_orange_diamond: Microcorruption - reversal challenges done in the web interface.
-  :small_orange_diamond: Crackmes - download crackmes to help improve your reverse engineering skills.
-  :small_orange_diamond: DomGoat - DOM XSS security learning and practicing platform.
-  :small_orange_diamond: Stereotyped Challenges - upgrade your web hacking techniques today!
-  :small_orange_diamond: Vulnhub - allows anyone to gain practical 'hands-on' experience in digital security.
-  :small_orange_diamond: W3Challs - is a penetration testing training platform, which offers various computer challenges.
-  :small_orange_diamond: RingZer0 CTF - offers you tons of challenges designed to test and improve your hacking skills.
-  :small_orange_diamond: Hack.me - a platform where you can build, host and share vulnerable web apps for educational purposes.
-  :small_orange_diamond: HackThis! - discover how hacks, dumps and defacements are performed and secure your website.
-  :small_orange_diamond: Enigma Group WebApp Training - these challenges cover the exploits listed in the OWASP Top 10 Project.
-  :small_orange_diamond: Reverse Engineering Challenges - challenges, exercises, problems and tasks - by level, by type, and more.
-  :small_orange_diamond: 0x00sec - the home of the Hacker - Malware, Reverse Engineering, and Computer Science.
-  :small_orange_diamond: We Chall - there are exist a lots of different challenge types.
-  :small_orange_diamond: Hacker Gateway - is the go-to place for hackers who want to test their skills.
-  :small_orange_diamond: Hacker101 - is a free class for web security.
-  :small_orange_diamond: contained.af - a stupid game for learning about containers, capabilities, and syscalls.
-  :small_orange_diamond: flAWS challenge! - a series of levels you'll learn about common mistakes and gotchas when using AWS.
-  :small_orange_diamond: CyberSec WTF - provides web hacking challenges derived from bounty write-ups.
-  :small_orange_diamond: CTF Challenge - CTF Web App challenges.
-  :small_orange_diamond: gCTF - most of the challenges used in the Google CTF 2017.
-  :small_orange_diamond: Hack This Site - is a free, safe and legal training ground for hackers.
-  :small_orange_diamond: Attack & Defense - is a browser-based cloud labs.
-  :small_orange_diamond: Cryptohack - a fun platform for learning modern cryptography.
-  :small_orange_diamond: Cryptopals - the cryptopals crypto challenges.
-

- -##### :black_small_square: CTF platforms - -

-  :small_orange_diamond: fbctf - platform to host Capture the Flag competitions.
-  :small_orange_diamond: ctfscoreboard - scoreboard for Capture The Flag competitions.
-

- -##### :black_small_square: Other resources - -

-  :small_orange_diamond: Bugcrowd University - open source education content for the researcher community.
-  :small_orange_diamond: OSCPRepo - a list of resources and scripts that I have been gathering in preparation for the OSCP.
-  :small_orange_diamond: OWASP Top 10: Real-World Examples - test your web apps with real-world examples (two-part series).
-  :small_orange_diamond: phrack.org - an awesome collection of articles from several respected hackers and other thinkers.
-  :small_orange_diamond: Practical-Ethical-Hacking-Resources - compilation of resources from TCM's Udemy Course.
-

- -#### Your daily knowledge and news  [[TOC]](#anger-table-of-contents) - -##### :black_small_square: RSS Readers - -

-  :small_orange_diamond: Feedly - organize, read and share what matters to you.
-  :small_orange_diamond: Inoreader - similar to feedly with a support for filtering what you fetch from rss.
-

- -##### :black_small_square: IRC Channels - -

-  :small_orange_diamond: #hackerspaces - hackerspace IRC channels.
-

- -##### :black_small_square: Security - -

-  :small_orange_diamond: The Hacker News - leading news source dedicated to promoting awareness for security experts and hackers.
-  :small_orange_diamond: Latest Hacking News - provides the latest hacking news, exploits and vulnerabilities for ethical hackers.
-  :small_orange_diamond: Security Newsletter - security news as a weekly digest (email notifications).
-  :small_orange_diamond: Google Online Security Blog - the latest news and insights from Google on security and safety on the Internet.
-  :small_orange_diamond: Qualys Blog - expert network security guidance and news.
-  :small_orange_diamond: DARKReading - connecting the Information Security Community.
-  :small_orange_diamond: Darknet - latest hacking tools, hacker news, cybersecurity best practices, ethical hacking & pen-testing.
-  :small_orange_diamond: publiclyDisclosed - public disclosure watcher who keeps you up to date about the recently disclosed bugs.
-  :small_orange_diamond: Reddit - Hacking - a subreddit dedicated to hacking and hackers.
-  :small_orange_diamond: Packet Storm - information security services, news, files, tools, exploits, advisories and whitepapers.
-  :small_orange_diamond: Sekurak - about security, penetration tests, vulnerabilities and many others (PL/EN).
-  :small_orange_diamond: nf.sec - basic aspects and mechanisms of Linux operating system security (PL).
-

- -##### :black_small_square: Other/All-in-one - -

-  :small_orange_diamond: Changelog - is a community of hackers; news & podcasts for developers and hackers.
-

- -#### Other Cheat Sheets  [[TOC]](#anger-table-of-contents) - -###### Build your own DNS Servers - -

-  :small_orange_diamond: Unbound DNS Tutorial - a validating, recursive, and caching DNS server.
-  :small_orange_diamond: Knot Resolver on Fedora - how to get faster and more secure DNS resolution with Knot Resolver on Fedora.
-  :small_orange_diamond: DNS-over-HTTPS - tutorial to setup your own DNS-over-HTTPS (DoH) server.
-  :small_orange_diamond: dns-over-https - a cartoon intro to DNS over HTTPS.
-  :small_orange_diamond: DNS-over-TLS - following to your DoH server, setup your DNS-over-TLS (DoT) server.
-  :small_orange_diamond: DNS Servers - how (and why) i run my own DNS Servers.
-

- -###### Build your own Certificate Authority - -

-  :small_orange_diamond: OpenSSL Certificate Authority - build your own certificate authority (CA) using the OpenSSL tools.
-  :small_orange_diamond: step-ca Certificate Authority - build your own certificate authority (CA) using open source step-ca.
-

- -###### Build your own System/Virtual Machine - -

-  :small_orange_diamond: os-tutorial - how to create an OS from scratch.
-  :small_orange_diamond: Write your Own Virtual Machine - how to write your own virtual machine (VM).
-  :small_orange_diamond: x86 Bare Metal Examples - dozens of minimal operating systems to learn x86 system programming.
-  :small_orange_diamond: simple-computer - the scott CPU from "But How Do It Know?" by J. Clark Scott.
-  :small_orange_diamond: littleosbook - the little book about OS development.
-

- -###### DNS Servers list (privacy) - -| IP | URL | -| :--- | :--- | -| **`84.200.69.80`** | [dns.watch](https://dns.watch/) | -| **`94.247.43.254`** | [opennic.org](https://www.opennic.org/) | -| **`64.6.64.6`** | [verisign.com](https://www.verisign.com/en_US/security-services/public-dns/index.xhtml) | -| **`89.233.43.71`** | [censurfridns.dk](https://blog.uncensoreddns.org/) | -| **`1.1.1.1`** | [cloudflare.com](https://1.1.1.1/) | -| **`94.130.110.185`** | [dnsprivacy.at](https://dnsprivacy.at/) | - -###### TOP Browser extensions - -| Extension name | Description | -| :--- | :--- | -| **`IPvFoo`** | Display the server IP address and HTTPS information across all page elements. | -| **`FoxyProxy`** | Simplifies configuring browsers to access proxy-servers. | -| **`HTTPS Everywhere`** | Automatically use HTTPS security on many sites. | -| **`uMatrix`** | Point & click to forbid/allow any class of requests made by your browser. | -| **`uBlock Origin`** | An efficient blocker: easy on memory and CPU footprint. | -| **`Session Buddy`** | Manage browser tabs and bookmarks with ease. | -| **`SuperSorter`** | Sort bookmarks recursively, delete duplicates, merge folders, and more. | -| **`Clear Cache`** | Clear your cache and browsing data. | -| **`d3coder`** | Encoding/Decoding plugin for various types of encoding. | -| **`Web Developer`** | Adds a toolbar button with various web developer tools. | -| **`ThreatPinch Lookup`** | Add threat intelligence hover tool tips. | - -###### TOP Burp extensions - -| Extension name | Description | -| :--- | :--- | -| **`Active Scan++`** | Extends Burp's active and passive scanning capabilities. | -| **`Autorize`** | Automatically detects authorization enforcement. | -| **`AuthMatrix`** | A simple matrix grid to define the desired levels of access privilege. | -| **`Logger++`** | Logs requests and responses for all Burp tools in a sortable table. | -| **`Bypass WAF`** | Adds headers useful for bypassing some WAF devices. | -| **`JSON Beautifier`** | Beautifies JSON content in the HTTP message viewer. | -| **`JSON Web Tokens`** | Enables Burp to decode and manipulate JSON web tokens. | -| **`CSP Auditor`** | Displays CSP headers for responses, and passively reports CSP weaknesses. | -| **`CSP-Bypass`** | Passively scans for CSP headers that contain known bypasses. | -| **`Hackvertor`** | Converts data using a tag-based configuration to apply various encoding. | -| **`HTML5 Auditor`** | Scans for usage of risky HTML5 features. | -| **`Software Vulnerability Scanner`** | Vulnerability scanner based on vulners.com audit API. | -| **`Turbo Intruder`** | Is a powerful bruteforcing tool. | -| **`Upload Scanner`** | Upload a number of different file types, laced with different forms of payload. | - -###### Hack Mozilla Firefox address bar - -In Firefox's address bar, you can limit results by typing special characters before or after your term: - -- `^` - for matches in your browsing history -- `*` - for matches in your bookmarks. -- `%` - for matches in your currently open tabs. -- `#` - for matches in page titles. -- `@` - for matches in web addresses. - -###### Chrome hidden commands - -- `chrome://chrome-urls` - list of all commands -- `chrome://flags` - enable experiments and development features -- `chrome://interstitials` - errors and warnings -- `chrome://net-internals` - network internals (events, dns, cache) -- `chrome://network-errors` - network errors -- `chrome://net-export` - start logging future network activity to a file -- `chrome://safe-browsing` - safe browsing options -- `chrome://user-actions` - record all user actions -- `chrome://restart` - restart chrome -- `chrome://dino` - ERR_INTERNET_DISCONNECTED... -- `cache:` - view the cached version of the web page - -###### Bypass WAFs by Shortening IP Address (by [0xInfection](https://twitter.com/0xInfection)) - -IP addresses can be shortened by dropping the zeroes: - -``` -http://1.0.0.1 → http://1.1 -http://127.0.0.1 → http://127.1 -http://192.168.0.1 → http://192.168.1 - -http://0xC0A80001 or http://3232235521 → 192.168.0.1 -http://192.168.257 → 192.168.1.1 -http://192.168.516 → 192.168.2.4 -``` - - > This bypasses WAF filters for SSRF, open-redirect, etc where any IP as input gets blacklisted. - -For more information please see [How to Obscure Any URL](http://www.pc-help.org/obscure.htm) and [Magic IP Address Shortcuts](https://stuff-things.net/2014/09/25/magic-ip-address-shortcuts/). - -###### Hashing, encryption and encoding (by [Michal Špaček](https://twitter.com/spazef0rze)) - -_Hashing_ - -plaintext :arrow_right: hash
-hash :no_entry: plaintext - -_Symmetric encryption_ - -plaintext :arrow_right: :key: :arrow_right: ciphertext
-plaintext :arrow_left: :key: :arrow_left: ciphertext
-(:key: shared key) - -_Asymmetric encryption_ - -plaintext :arrow_right: :key: :arrow_right: ciphertext
-plaintext :arrow_left: :part_alternation_mark: :arrow_left: ciphertext
-(:key: public key, :part_alternation_mark: private key)
- -_Encoding_ - -text :arrow_right: encoded
-text :arrow_left: encoded - -#### Shell One-liners  [[TOC]](#anger-table-of-contents) - -##### Table of Contents - - * [terminal](#tool-terminal) - * [busybox](#tool-busybox) - * [mount](#tool-mount) - * [fuser](#tool-fuser) - * [lsof](#tool-lsof) - * [ps](#tool-ps) - * [top](#tool-top) - * [vmstat](#tool-vmstat) - * [iostat](#tool-iostat) - * [strace](#tool-strace) - * [kill](#tool-kill) - * [find](#tool-find) - * [diff](#tool-diff) - * [vimdiff](#tool-vimdiff) - * [tail](#tool-tail) - * [cpulimit](#tool-cpulimit) - * [pwdx](#tool-pwdx) - * [tr](#tool-tr) - * [chmod](#tool-chmod) - * [who](#tool-who) - * [last](#tool-last) - * [screen](#tool-screen) - * [script](#tool-script) - * [du](#tool-du) - * [inotifywait](#tool-inotifywait) - * [openssl](#tool-openssl) - * [secure-delete](#tool-secure-delete) - * [dd](#tool-dd) - * [gpg](#tool-gpg) - * [system-other](#tool-system-other) - * [curl](#tool-curl) - * [httpie](#tool-httpie) - * [ssh](#tool-ssh) - * [linux-dev](#tool-linux-dev) - * [tcpdump](#tool-tcpdump) - * [tcpick](#tool-tcpick) - * [ngrep](#tool-ngrep) - * [hping3](#tool-hping3) - * [nmap](#tool-nmap) - * [netcat](#tool-netcat) - * [socat](#tool-socat) - * [p0f](#tool-p0f) - * [gnutls-cli](#tool-gnutls-cli) - * [netstat](#tool-netstat) - * [rsync](#tool-rsync) - * [host](#tool-host) - * [dig](#tool-dig) - * [certbot](#tool-certbot) - * [network-other](#tool-network-other) - * [git](#tool-git) - * [awk](#tool-awk) - * [sed](#tool-sed) - * [grep](#tool-grep) - * [perl](#tool-perl) - -##### Tool: [terminal](https://en.wikipedia.org/wiki/Linux_console) - -###### Reload shell without exit - -```bash -exec $SHELL -l -``` - -###### Close shell keeping all subprocess running - -```bash -disown -a && exit -``` - -###### Exit without saving shell history - -```bash -kill -9 $$ -unset HISTFILE && exit -``` - -###### Perform a branching conditional - -```bash -true && echo success -false || echo failed -``` - -###### Pipe stdout and stderr to separate commands - -```bash -some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr) -``` - -###### Redirect stdout and stderr each to separate files and print both to the screen - -```bash -(some_command 2>&1 1>&3 | tee errorlog ) 3>&1 1>&2 | tee stdoutlog -``` - -###### List of commands you use most often - -```bash -history | \ -awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | \ -grep -v "./" | \ -column -c3 -s " " -t | \ -sort -nr | nl | head -n 20 -``` - -###### Sterilize bash history - -```bash -function sterile() { - - history | awk '$2 != "history" { $1=""; print $0 }' | egrep -vi "\ -curl\b+.*(-E|--cert)\b+.*\b*|\ -curl\b+.*--pass\b+.*\b*|\ -curl\b+.*(-U|--proxy-user).*:.*\b*|\ -curl\b+.*(-u|--user).*:.*\b* -.*(-H|--header).*(token|auth.*)\b+.*|\ -wget\b+.*--.*password\b+.*\b*|\ -http.?://.+:.+@.*\ -" > $HOME/histbuff; history -r $HOME/histbuff; - -} - -export PROMPT_COMMAND="sterile" -``` - - > Look also: [A naive utility to censor credentials in command history](https://github.com/lbonanomi/go/blob/master/revisionist.go). - -###### Quickly backup a file - -```bash -cp filename{,.orig} -``` - -###### Empty a file (truncate to 0 size) - -```bash ->filename -``` - -###### Delete all files in a folder that don't match a certain file extension - -```bash -rm !(*.foo|*.bar|*.baz) -``` - -###### Pass multi-line string to a file - -```bash -# cat >filename ... - overwrite the file -# cat >>filename ... - append to a file -cat > filename << __EOF__ -data data data -__EOF__ -``` - -###### Edit a file on a remote host using vim - -```bash -vim scp://user@host//etc/fstab -``` - -###### Create a directory and change into it at the same time - -```bash -mkd() { mkdir -p "$@" && cd "$@"; } -``` - -###### Convert uppercase files to lowercase files - -```bash -rename 'y/A-Z/a-z/' * -``` - -###### Print a row of characters across the terminal - -```bash -printf "%`tput cols`s" | tr ' ' '#' -``` - -###### Show shell history without line numbers - -```bash -history | cut -c 8- -fc -l -n 1 | sed 's/^\s*//' -``` - -###### Run command(s) after exit session - -```bash -cat > /etc/profile << __EOF__ -_after_logout() { - - username=$(whoami) - - for _pid in $(ps afx | grep sshd | grep "$username" | awk '{print $1}') ; do - - kill -9 $_pid - - done - -} -trap _after_logout EXIT -__EOF__ -``` - -###### Generate a sequence of numbers - -```bash -for ((i=1; i<=10; i+=2)) ; do echo $i ; done -# alternative: seq 1 2 10 - -for ((i=5; i<=10; ++i)) ; do printf '%02d\n' $i ; done -# alternative: seq -w 5 10 - -for i in {1..10} ; do echo $i ; done -``` - -###### Simple Bash filewatching - -```bash -unset MAIL; export MAILCHECK=1; export MAILPATH='$FILE_TO_WATCH?$MESSAGE' -``` - ---- - -##### Tool: [busybox](https://www.busybox.net/) - -###### Static HTTP web server - -```bash -busybox httpd -p $PORT -h $HOME [-c httpd.conf] -``` - -___ - -##### Tool: [mount](https://en.wikipedia.org/wiki/Mount_(Unix)) - -###### Mount a temporary ram partition - -```bash -mount -t tmpfs tmpfs /mnt -o size=64M -``` - - * `-t` - filesystem type - * `-o` - mount options - -###### Remount a filesystem as read/write - -```bash -mount -o remount,rw / -``` - -___ - -##### Tool: [fuser](https://en.wikipedia.org/wiki/Fuser_(Unix)) - -###### Show which processes use the files/directories - -```bash -fuser /var/log/daemon.log -fuser -v /home/supervisor -``` - -###### Kills a process that is locking a file - -```bash -fuser -ki filename -``` - - * `-i` - interactive option - -###### Kills a process that is locking a file with specific signal - -```bash -fuser -k -HUP filename -``` - - * `--list-signals` - list available signal names - -###### Show what PID is listening on specific port - -```bash -fuser -v 53/udp -``` - -###### Show all processes using the named filesystems or block device - -```bash -fuser -mv /var/www -``` - -___ - -##### Tool: [lsof](https://en.wikipedia.org/wiki/Lsof) - -###### Show process that use internet connection at the moment - -```bash -lsof -P -i -n -``` - -###### Show process that use specific port number - -```bash -lsof -i tcp:443 -``` - -###### Lists all listening ports together with the PID of the associated process - -```bash -lsof -Pan -i tcp -i udp -``` - -###### List all open ports and their owning executables - -```bash -lsof -i -P | grep -i "listen" -``` - -###### Show all open ports - -```bash -lsof -Pnl -i -``` - -###### Show open ports (LISTEN) - -```bash -lsof -Pni4 | grep LISTEN | column -t -``` - -###### List all files opened by a particular command - -```bash -lsof -c "process" -``` - -###### View user activity per directory - -```bash -lsof -u username -a +D /etc -``` - -###### Show 10 largest open files - -```bash -lsof / | \ -awk '{ if($7 > 1048576) print $7/1048576 "MB" " " $9 " " $1 }' | \ -sort -n -u | tail | column -t -``` - -###### Show current working directory of a process - -```bash -lsof -p | grep cwd -``` - -___ - -##### Tool: [ps](https://en.wikipedia.org/wiki/Ps_(Unix)) - -###### Show a 4-way scrollable process tree with full details - -```bash -ps awwfux | less -S -``` - -###### Processes per user counter - -```bash -ps hax -o user | sort | uniq -c | sort -r -``` - -###### Show all processes by name with main header - -```bash -ps -lfC nginx -``` - -___ - -##### Tool: [find](https://en.wikipedia.org/wiki/Find_(Unix)) - -###### Find files that have been modified on your system in the past 60 minutes - -```bash -find / -mmin 60 -type f -``` - -###### Find all files larger than 20M - -```bash -find / -type f -size +20M -``` - -###### Find duplicate files (based on MD5 hash) - -```bash -find -type f -exec md5sum '{}' ';' | sort | uniq --all-repeated=separate -w 33 -``` - -###### Change permission only for files - -```bash -cd /var/www/site && find . -type f -exec chmod 766 {} \; -cd /var/www/site && find . -type f -exec chmod 664 {} + -``` - -###### Change permission only for directories - -```bash -cd /var/www/site && find . -type d -exec chmod g+x {} \; -cd /var/www/site && find . -type d -exec chmod g+rwx {} + -``` - -###### Find files and directories for specific user/group - -```bash -# User: -find . -user -print -find /etc -type f -user -name "*.conf" - -# Group: -find /opt -group -find /etc -type f -group -iname "*.conf" -``` - -###### Find files and directories for all without specific user/group - -```bash -# User: -find . \! -user -print - -# Group: -find . \! -group -``` - -###### Looking for files/directories that only have certain permission - -```bash -# User -find . -user -perm -u+rw # -rw-r--r-- -find /home -user $(whoami) -perm 777 # -rwxrwxrwx - -# Group: -find /home -type d -group -perm 755 # -rwxr-xr-x -``` - -###### Delete older files than 60 days - -```bash -find . -type f -mtime +60 -delete -``` - -###### Recursively remove all empty sub-directories from a directory - -```bash -find . -depth -type d -empty -exec rmdir {} \; -``` - -###### How to find all hard links to a file - -```bash -find -xdev -samefile filename -``` - -###### Recursively find the latest modified files - -```bash -find . -type f -exec stat --format '%Y :%y %n' "{}" \; | sort -nr | cut -d: -f2- | head -``` - -###### Recursively find/replace of a string with sed - -```bash -find . -not -path '*/\.git*' -type f -print0 | xargs -0 sed -i 's/foo/bar/g' -``` - -###### Recursively find/replace of a string in directories and file names - -```bash -find . -depth -name '*test*' -execdir bash -c 'mv -v "$1" "${1//foo/bar}"' _ {} \; -``` - -###### Recursively find suid executables - -```bash -find / \( -perm -4000 -o -perm -2000 \) -type f -exec ls -la {} \; -``` - -___ - -##### Tool: [top](https://en.wikipedia.org/wiki/Top_(software)) - -###### Use top to monitor only all processes with the specific string - -```bash -top -p $(pgrep -d , ) -``` - - * `` - process containing string (eg. nginx, worker) - -___ - -##### Tool: [vmstat](https://en.wikipedia.org/wiki/Vmstat) - -###### Show current system utilization (fields in kilobytes) - -```bash -vmstat 2 20 -t -w -``` - - * `2` - number of times with a defined time interval (delay) - * `20` - each execution of the command (count) - * `-t` - show timestamp - * `-w` - wide output - * `-S M` - output of the fields in megabytes instead of kilobytes - -###### Show current system utilization will get refreshed every 5 seconds - -```bash -vmstat 5 -w -``` - -###### Display report a summary of disk operations - -```bash -vmstat -D -``` - -###### Display report of event counters and memory stats - -```bash -vmstat -s -``` - -###### Display report about kernel objects stored in slab layer cache - -```bash -vmstat -m -``` - -##### Tool: [iostat](https://en.wikipedia.org/wiki/Iostat) - -###### Show information about the CPU usage, and I/O statistics about all the partitions - -```bash -iostat 2 10 -t -m -``` - - * `2` - number of times with a defined time interval (delay) - * `10` - each execution of the command (count) - * `-t` - show timestamp - * `-m` - fields in megabytes (`-k` - in kilobytes, default) - -###### Show information only about the CPU utilization - -```bash -iostat 2 10 -t -m -c -``` - -###### Show information only about the disk utilization - -```bash -iostat 2 10 -t -m -d -``` - -###### Show information only about the LVM utilization - -```bash -iostat -N -``` - -___ - -##### Tool: [strace](https://en.wikipedia.org/wiki/Strace) - -###### Track with child processes - -```bash -# 1) -strace -f -p $(pidof glusterfsd) - -# 2) -strace -f $(pidof php-fpm | sed 's/\([0-9]*\)/\-p \1/g') -``` - -###### Track process with 30 seconds limit - -```bash -timeout 30 strace $(< /var/run/zabbix/zabbix_agentd.pid) -``` - -###### Track processes and redirect output to a file - -```bash -ps auxw | grep '[a]pache' | awk '{print " -p " $2}' | \ -xargs strace -o /tmp/strace-apache-proc.out -``` - -###### Track with print time spent in each syscall and limit length of print strings - -```bash -ps auxw | grep '[i]init_policy' | awk '{print " -p " $2}' | \ -xargs strace -f -e trace=network -T -s 10000 -``` - -###### Track the open request of a network port - -```bash -strace -f -e trace=bind nc -l 80 -``` - -###### Track the open request of a network port (show TCP/UDP) - -```bash -strace -f -e trace=network nc -lu 80 -``` - -___ - -##### Tool: [kill](https://en.wikipedia.org/wiki/Kill_(command)) - -###### Kill a process running on port - -```bash -kill -9 $(lsof -i : | awk '{l=$2} END {print l}') -``` - -___ - -##### Tool: [diff](https://en.wikipedia.org/wiki/Diff) - -###### Compare two directory trees - -```bash -diff <(cd directory1 && find | sort) <(cd directory2 && find | sort) -``` - -###### Compare output of two commands - -```bash -diff <(cat /etc/passwd) <(cut -f2 /etc/passwd) -``` - -___ - -##### Tool: [vimdiff](http://vimdoc.sourceforge.net/htmldoc/diff.html) - -###### Highlight the exact differences, based on characters and words - -```bash -vimdiff file1 file2 -``` - -###### Compare two JSON files - -```bash -vimdiff <(jq -S . A.json) <(jq -S . B.json) -``` - -###### Compare Hex dump - -```bash -d(){ vimdiff <(f $1) <(f $2);};f(){ hexdump -C $1 | cut -d' ' -f3- | tr -s ' ';}; d ~/bin1 ~/bin2 -``` - -###### diffchar - -Save [diffchar](https://raw.githubusercontent.com/vim-scripts/diffchar.vim/master/plugin/diffchar.vim) @ `~/.vim/plugins` - -Click `F7` to switch between diff modes - -Usefull `vimdiff` commands: - -* `qa` to exit all windows -* `:vertical resize 70` to resize window -* set window width `Ctrl+W [N columns]+(Shift+)<\>` - -___ - -##### Tool: [tail](https://en.wikipedia.org/wiki/Tail_(Unix)) - -###### Annotate tail -f with timestamps - -```bash -tail -f file | while read ; do echo "$(date +%T.%N) $REPLY" ; done -``` - -###### Analyse an Apache access log for the most common IP addresses - -```bash -tail -10000 access_log | awk '{print $1}' | sort | uniq -c | sort -n | tail -``` - -###### Analyse web server log and show only 5xx http codes - -```bash -tail -n 100 -f /path/to/logfile | grep "HTTP/[1-2].[0-1]\" [5]" -``` - -___ - -##### Tool: [tar](https://en.wikipedia.org/wiki/Tar_(computing)) - -###### System backup with exclude specific directories - -```bash -cd / -tar -czvpf /mnt/system$(date +%d%m%Y%s).tgz --directory=/ \ ---exclude=proc/* --exclude=sys/* --exclude=dev/* --exclude=mnt/* . -``` - -###### System backup with exclude specific directories (pigz) - -```bash -cd / -tar cvpf /backup/snapshot-$(date +%d%m%Y%s).tgz --directory=/ \ ---exclude=proc/* --exclude=sys/* --exclude=dev/* \ ---exclude=mnt/* --exclude=tmp/* --use-compress-program=pigz . -``` - -___ - -##### Tool: [dump](https://en.wikipedia.org/wiki/Dump_(program)) - -###### System backup to file - -```bash -dump -y -u -f /backup/system$(date +%d%m%Y%s).lzo / -``` - -###### Restore system from lzo file - -```bash -cd / -restore -rf /backup/system$(date +%d%m%Y%s).lzo -``` - -___ - -##### Tool: [cpulimit](http://cpulimit.sourceforge.net/) - -###### Limit the cpu usage of a process - -```bash -cpulimit -p pid -l 50 -``` - -___ - -##### Tool: [pwdx](https://www.cyberciti.biz/faq/unix-linux-pwdx-command-examples-usage-syntax/) - -###### Show current working directory of a process - -```bash -pwdx -``` - -___ - -##### Tool: [taskset](https://www.cyberciti.biz/faq/taskset-cpu-affinity-command/) - -###### Start a command on only one CPU core - -```bash -taskset -c 0 -``` - -___ - -##### Tool: [tr](https://en.wikipedia.org/wiki/Tr_(Unix)) - -###### Show directories in the PATH, one per line - -```bash -tr : '\n' <<<$PATH -``` - -___ - -##### Tool: [chmod](https://en.wikipedia.org/wiki/Chmod) - -###### Remove executable bit from all files in the current directory - -```bash -chmod -R -x+X * -``` - -###### Restore permission for /bin/chmod - -```bash -# 1: -cp /bin/ls chmod.01 -cp /bin/chmod chmod.01 -./chmod.01 700 file - -# 2: -/bin/busybox chmod 0700 /bin/chmod - -# 3: -setfacl --set u::rwx,g::---,o::--- /bin/chmod -``` - -___ - -##### Tool: [who](https://en.wikipedia.org/wiki/Who_(Unix)) - -###### Find last reboot time - -```bash -who -b -``` - -###### Detect a user sudo-su'd into the current shell - -```bash -[[ $(who -m | awk '{ print $1 }') == $(whoami) ]] || echo "You are su-ed to $(whoami)" -``` - -___ - -##### Tool: [last](https://www.howtoforge.com/linux-last-command/) - -###### Was the last reboot a panic? - -```bash -(last -x -f $(ls -1t /var/log/wtmp* | head -2 | tail -1); last -x -f /var/log/wtmp) | \ -grep -A1 reboot | head -2 | grep -q shutdown && echo "Expected reboot" || echo "Panic reboot" -``` - -___ - -##### Tool: [screen](https://en.wikipedia.org/wiki/GNU_Screen) - -###### Start screen in detached mode - -```bash -screen -d -m -``` - -###### Attach to an existing screen session - -```bash -screen -r -d -``` - -___ - -##### Tool: [script](https://en.wikipedia.org/wiki/Script_(Unix)) - -###### Record and replay terminal session - -```bash -### Record session -# 1) -script -t 2>~/session.time -a ~/session.log - -# 2) -script --timing=session.time session.log - -### Replay session -scriptreplay --timing=session.time session.log -``` - -___ - -##### Tool: [du](https://en.wikipedia.org/wiki/GNU_Screen) - -###### Show 20 biggest directories with 'K M G' - -```bash -du | \ -sort -r -n | \ -awk '{split("K M G",v); s=1; while($1>1024){$1/=1024; s++} print int($1)" "v[s]"\t"$2}' | \ -head -n 20 -``` - -___ - -##### Tool: [inotifywait](https://en.wikipedia.org/wiki/GNU_Screen) - -###### Init tool everytime a file in a directory is modified - -```bash -while true ; do inotifywait -r -e MODIFY dir/ && ls dir/ ; done; -``` - -___ - -##### Tool: [openssl](https://www.openssl.org/) - -###### Testing connection to the remote host - -```bash -echo | openssl s_client -connect google.com:443 -showcerts -``` - -###### Testing connection to the remote host (debug mode) - -```bash -echo | openssl s_client -connect google.com:443 -showcerts -tlsextdebug -status -``` - -###### Testing connection to the remote host (with SNI support) - -```bash -echo | openssl s_client -showcerts -servername google.com -connect google.com:443 -``` - -###### Testing connection to the remote host with specific ssl version - -```bash -openssl s_client -tls1_2 -connect google.com:443 -``` - -###### Testing connection to the remote host with specific ssl cipher - -```bash -openssl s_client -cipher 'AES128-SHA' -connect google.com:443 -``` - -###### Verify 0-RTT - -```bash -_host="example.com" - -cat > req.in << __EOF__ -HEAD / HTTP/1.1 -Host: $_host -Connection: close -__EOF__ - -openssl s_client -connect ${_host}:443 -tls1_3 -sess_out session.pem -ign_eof < req.in -openssl s_client -connect ${_host}:443 -tls1_3 -sess_in session.pem -early_data req.in -``` - -###### Generate private key without passphrase - -```bash -# _len: 2048, 4096 -( _fd="private.key" ; _len="2048" ; \ -openssl genrsa -out ${_fd} ${_len} ) -``` - -###### Generate private key with passphrase - -```bash -# _ciph: aes128, aes256 -# _len: 2048, 4096 -( _ciph="aes128" ; _fd="private.key" ; _len="2048" ; \ -openssl genrsa -${_ciph} -out ${_fd} ${_len} ) -``` - -###### Remove passphrase from private key - -```bash -( _fd="private.key" ; _fd_unp="private_unp.key" ; \ -openssl rsa -in ${_fd} -out ${_fd_unp} ) -``` - -###### Encrypt existing private key with a passphrase - -```bash -# _ciph: aes128, aes256 -( _ciph="aes128" ; _fd="private.key" ; _fd_pass="private_pass.key" ; \ -openssl rsa -${_ciph} -in ${_fd} -out ${_fd_pass} -``` - -###### Check private key - -```bash -( _fd="private.key" ; \ -openssl rsa -check -in ${_fd} ) -``` - -###### Get public key from private key - -```bash -( _fd="private.key" ; _fd_pub="public.key" ; \ -openssl rsa -pubout -in ${_fd} -out ${_fd_pub} ) -``` - -###### Generate private key and CSR - -```bash -( _fd="private.key" ; _fd_csr="request.csr" ; _len="2048" ; \ -openssl req -out ${_fd_csr} -new -newkey rsa:${_len} -nodes -keyout ${_fd} ) -``` - -###### Generate CSR - -```bash -( _fd="private.key" ; _fd_csr="request.csr" ; \ -openssl req -out ${_fd_csr} -new -key ${_fd} ) -``` - -###### Generate CSR (metadata from existing certificate) - - > Where `private.key` is the existing private key. As you can see you do not generate this CSR from your certificate (public key). Also you do not generate the "same" CSR, just a new one to request a new certificate. - -```bash -( _fd="private.key" ; _fd_csr="request.csr" ; _fd_crt="cert.crt" ; \ -openssl x509 -x509toreq -in ${_fd_crt} -out ${_fd_csr} -signkey ${_fd} ) -``` - -###### Generate CSR with -config param - -```bash -( _fd="private.key" ; _fd_csr="request.csr" ; \ -openssl req -new -sha256 -key ${_fd} -out ${_fd_csr} \ --config <( -cat << __EOF__ -[req] -default_bits = 2048 -default_md = sha256 -prompt = no -distinguished_name = dn -req_extensions = req_ext - -[ dn ] -C = "" -ST = "" -L = "" -O = "" -OU = "
" -CN = "" - -[ req_ext ] -subjectAltName = @alt_names - -[ alt_names ] -DNS.1 = -DNS.2 = -DNS.3 = -__EOF__ -)) -``` - -Other values in `[ dn ]`: - -``` -countryName = "DE" # C= -stateOrProvinceName = "Hessen" # ST= -localityName = "Keller" # L= -postalCode = "424242" # L/postalcode= -postalAddress = "Keller" # L/postaladdress= -streetAddress = "Crater 1621" # L/street= -organizationName = "apfelboymschule" # O= -organizationalUnitName = "IT Department" # OU= -commonName = "example.com" # CN= -emailAddress = "webmaster@example.com" # CN/emailAddress= -``` - -Example of `oids` (you'll probably also have to make OpenSSL know about the new fields required for EV by adding the following under `[new_oids]`): - -``` -[req] -... -oid_section = new_oids - -[ new_oids ] -postalCode = 2.5.4.17 -streetAddress = 2.5.4.9 -``` - -Full example: - -```bash -( _fd="private.key" ; _fd_csr="request.csr" ; \ -openssl req -new -sha256 -key ${_fd} -out ${_fd_csr} \ --config <( -cat << __EOF__ -[req] -default_bits = 2048 -default_md = sha256 -prompt = no -distinguished_name = dn -req_extensions = req_ext -oid_section = new_oids - -[ new_oids ] -serialNumber = 2.5.4.5 -streetAddress = 2.5.4.9 -postalCode = 2.5.4.17 -businessCategory = 2.5.4.15 - -[ dn ] -serialNumber=00001111 -businessCategory=Private Organization -jurisdictionC=DE -C=DE -ST=Hessen -L=Keller -postalCode=424242 -streetAddress=Crater 1621 -O=AV Company -OU=IT -CN=example.com - -[ req_ext ] -subjectAltName = @alt_names - -[ alt_names ] -DNS.1 = example.com -__EOF__ -)) -``` - -For more information please look at these great explanations: - -- [RFC 5280](https://tools.ietf.org/html/rfc5280) -- [How to create multidomain certificates using config files](https://apfelboymchen.net/gnu/notes/openssl%20multidomain%20with%20config%20files.html) -- [Generate a multi domains certificate using config files](https://gist.github.com/romainnorberg/464758a6620228b977212a3cf20c3e08) -- [Your OpenSSL CSR command is out of date](https://expeditedsecurity.com/blog/openssl-csr-command/) -- [OpenSSL example configuration file](https://www.tbs-certificats.com/openssl-dem-server-cert.cnf) -- [Object Identifiers (OIDs)](https://www.alvestrand.no/objectid/) -- [openssl objects.txt](https://github.com/openssl/openssl/blob/master/crypto/objects/objects.txt) - -###### List available EC curves - -```bash -openssl ecparam -list_curves -``` - -###### Print ECDSA private and public keys - -```bash -( _fd="private.key" ; \ -openssl ec -in ${_fd} -noout -text ) - -# For x25519 only extracting public key -( _fd="private.key" ; _fd_pub="public.key" ; \ -openssl pkey -in ${_fd} -pubout -out ${_fd_pub} ) -``` - -###### Generate ECDSA private key - -```bash -# _curve: prime256v1, secp521r1, secp384r1 -( _fd="private.key" ; _curve="prime256v1" ; \ -openssl ecparam -out ${_fd} -name ${_curve} -genkey ) - -# _curve: X25519 -( _fd="private.key" ; _curve="x25519" ; \ -openssl genpkey -algorithm ${_curve} -out ${_fd} ) -``` - -###### Generate private key and CSR (ECC) - -```bash -# _curve: prime256v1, secp521r1, secp384r1 -( _fd="domain.com.key" ; _fd_csr="domain.com.csr" ; _curve="prime256v1" ; \ -openssl ecparam -out ${_fd} -name ${_curve} -genkey ; \ -openssl req -new -key ${_fd} -out ${_fd_csr} -sha256 ) -``` - -###### Generate self-signed certificate - -```bash -# _len: 2048, 4096 -( _fd="domain.key" ; _fd_out="domain.crt" ; _len="2048" ; _days="365" ; \ -openssl req -newkey rsa:${_len} -nodes \ --keyout ${_fd} -x509 -days ${_days} -out ${_fd_out} ) -``` - -###### Generate self-signed certificate from existing private key - -```bash -# _len: 2048, 4096 -( _fd="domain.key" ; _fd_out="domain.crt" ; _days="365" ; \ -openssl req -key ${_fd} -nodes \ --x509 -days ${_days} -out ${_fd_out} ) -``` - -###### Generate self-signed certificate from existing private key and csr - -```bash -# _len: 2048, 4096 -( _fd="domain.key" ; _fd_csr="domain.csr" ; _fd_out="domain.crt" ; _days="365" ; \ -openssl x509 -signkey ${_fd} -nodes \ --in ${_fd_csr} -req -days ${_days} -out ${_fd_out} ) -``` - -###### Generate DH public parameters - -```bash -( _dh_size="2048" ; \ -openssl dhparam -out /etc/nginx/ssl/dhparam_${_dh_size}.pem "$_dh_size" ) -``` - -###### Display DH public parameters - -```bash -openssl pkeyparam -in dhparam.pem -text -``` - -###### Extract private key from pfx - -```bash -( _fd_pfx="cert.pfx" ; _fd_key="key.pem" ; \ -openssl pkcs12 -in ${_fd_pfx} -nocerts -nodes -out ${_fd_key} ) -``` - -###### Extract private key and certs from pfx - -```bash -( _fd_pfx="cert.pfx" ; _fd_pem="key_certs.pem" ; \ -openssl pkcs12 -in ${_fd_pfx} -nodes -out ${_fd_pem} ) -``` - -###### Extract certs from p7b - -```bash -# PKCS#7 file doesn't include private keys. -( _fd_p7b="cert.p7b" ; _fd_pem="cert.pem" ; \ -openssl pkcs7 -inform DER -outform PEM -in ${_fd_p7b} -print_certs > ${_fd_pem}) -# or: -openssl pkcs7 -print_certs -in -in ${_fd_p7b} -out ${_fd_pem}) -``` - -###### Convert DER to PEM - -```bash -( _fd_der="cert.crt" ; _fd_pem="cert.pem" ; \ -openssl x509 -in ${_fd_der} -inform der -outform pem -out ${_fd_pem} ) -``` - -###### Convert PEM to DER - -```bash -( _fd_der="cert.crt" ; _fd_pem="cert.pem" ; \ -openssl x509 -in ${_fd_pem} -outform der -out ${_fd_der} ) -``` - -###### Verification of the private key - -```bash -( _fd="private.key" ; \ -openssl rsa -noout -text -in ${_fd} ) -``` - -###### Verification of the public key - -```bash -# 1) -( _fd="public.key" ; \ -openssl pkey -noout -text -pubin -in ${_fd} ) - -# 2) -( _fd="private.key" ; \ -openssl rsa -inform PEM -noout -in ${_fd} &> /dev/null ; \ -if [ $? = 0 ] ; then echo -en "OK\n" ; fi ) -``` - -###### Verification of the certificate - -```bash -( _fd="certificate.crt" ; # format: pem, cer, crt \ -openssl x509 -noout -text -in ${_fd} ) -``` - -###### Verification of the CSR - -```bash -( _fd_csr="request.csr" ; \ -openssl req -text -noout -in ${_fd_csr} ) -``` - -###### Check the private key and the certificate are match - -```bash -(openssl rsa -noout -modulus -in private.key | openssl md5 ; \ -openssl x509 -noout -modulus -in certificate.crt | openssl md5) | uniq -``` - -###### Check the private key and the CSR are match - -```bash -(openssl rsa -noout -modulus -in private.key | openssl md5 ; \ -openssl req -noout -modulus -in request.csr | openssl md5) | uniq -``` - -___ - -##### Tool: [secure-delete](https://wiki.archlinux.org/index.php/Securely_wipe_disk) - -###### Secure delete with shred - -```bash -shred -vfuz -n 10 file -shred --verbose --random-source=/dev/urandom -n 1 /dev/sda -``` - -###### Secure delete with scrub - -```bash -scrub -p dod /dev/sda -scrub -p dod -r file -``` - -###### Secure delete with badblocks - -```bash -badblocks -s -w -t random -v /dev/sda -badblocks -c 10240 -s -w -t random -v /dev/sda -``` - -###### Secure delete with secure-delete - -```bash -srm -vz /tmp/file -sfill -vz /local -sdmem -v -swapoff /dev/sda5 && sswap -vz /dev/sda5 -``` - -___ - -##### Tool: [dd](https://en.wikipedia.org/wiki/Dd_(Unix)) - -###### Show dd status every so often - -```bash -dd status=progress -watch --interval 5 killall -USR1 dd -``` - -###### Redirect output to a file with dd - -```bash -echo "string" | dd of=filename -``` - -___ - -##### Tool: [gpg](https://www.gnupg.org/) - -###### Export public key - -```bash -gpg --export --armor "" > username.pkey -``` - - * `--export` - export all keys from all keyrings or specific key - * `-a|--armor` - create ASCII armored output - -###### Encrypt file - -```bash -gpg -e -r "" dump.sql -``` - - * `-e|--encrypt` - encrypt data - * `-r|--recipient` - encrypt for specific - -###### Decrypt file - -```bash -gpg -o dump.sql -d dump.sql.gpg -``` - - * `-o|--output` - use as output file - * `-d|--decrypt` - decrypt data (default) - -###### Search recipient - -```bash -gpg --keyserver hkp://keyserver.ubuntu.com --search-keys "" -``` - - * `--keyserver` - set specific key server - * `--search-keys` - search for keys on a key server - -###### List all of the packets in an encrypted file - -```bash -gpg --batch --list-packets archive.gpg -gpg2 --batch --list-packets archive.gpg -``` - -___ - -##### Tool: [system-other](https://github.com/trimstray/the-book-of-secret-knowledge#tool-system-other) - -###### Reboot system from init - -```bash -exec /sbin/init 6 -``` - -###### Init system from single user mode - -```bash -exec /sbin/init -``` - -###### Show current working directory of a process - -```bash -readlink -f /proc//cwd -``` - -###### Show actual pathname of the executed command - -```bash -readlink -f /proc//exe -``` - -##### Tool: [curl](https://curl.haxx.se) - -```bash -curl -Iks https://www.google.com -``` - - * `-I` - show response headers only - * `-k` - insecure connection when using ssl - * `-s` - silent mode (not display body) - -```bash -curl -Iks --location -X GET -A "x-agent" https://www.google.com -``` - - * `--location` - follow redirects - * `-X` - set method - * `-A` - set user-agent - -```bash -curl -Iks --location -X GET -A "x-agent" --proxy http://127.0.0.1:16379 https://www.google.com -``` - - * `--proxy [socks5://|http://]` - set proxy server - -```bash -curl -o file.pdf -C - https://example.com/Aiju2goo0Ja2.pdf -``` - - * `-o` - write output to file - * `-C` - resume the transfer - -###### Find your external IP address (external services) - -```bash -curl ipinfo.io -curl ipinfo.io/ip -curl icanhazip.com -curl ifconfig.me/ip ; echo -``` - -###### Repeat URL request - -```bash -# URL sequence substitution with a dummy query string: -curl -ks https://example.com/?[1-20] - -# With shell 'for' loop: -for i in {1..20} ; do curl -ks https://example.com/ ; done -``` - -###### Check DNS and HTTP trace with headers for specific domains - -```bash -### Set domains and external dns servers. -_domain_list=(google.com) ; _dns_list=("8.8.8.8" "1.1.1.1") - -for _domain in "${_domain_list[@]}" ; do - - printf '=%.0s' {1..48} - - echo - - printf "[\\e[1;32m+\\e[m] resolve: %s\\n" "$_domain" - - for _dns in "${_dns_list[@]}" ; do - - # Resolve domain. - host "${_domain}" "${_dns}" - - echo - - done - - for _proto in http https ; do - - printf "[\\e[1;32m+\\e[m] trace + headers: %s://%s\\n" "$_proto" "$_domain" - - # Get trace and http headers. - curl -Iks -A "x-agent" --location "${_proto}://${_domain}" - - echo - - done - -done - -unset _domain_list _dns_list -``` - -___ - -##### Tool: [httpie](https://httpie.org/) - -```bash -http -p Hh https://www.google.com -``` - - * `-p` - print request and response headers - * `H` - request headers - * `B` - request body - * `h` - response headers - * `b` - response body - -```bash -http -p Hh https://www.google.com --follow --verify no -``` - - * `-F, --follow` - follow redirects - * `--verify no` - skip SSL verification - -```bash -http -p Hh https://www.google.com --follow --verify no \ ---proxy http:http://127.0.0.1:16379 -``` - - * `--proxy [http:]` - set proxy server - -##### Tool: [ssh](https://www.openssh.com/) - -###### Escape Sequence - -``` -# Supported escape sequences: -~. - terminate connection (and any multiplexed sessions) -~B - send a BREAK to the remote system -~C - open a command line -~R - Request rekey (SSH protocol 2 only) -~^Z - suspend ssh -~# - list forwarded connections -~& - background ssh (when waiting for connections to terminate) -~? - this message -~~ - send the escape character by typing it twice -``` - -###### Compare a remote file with a local file - -```bash -ssh user@host cat /path/to/remotefile | diff /path/to/localfile - -``` - -###### SSH connection through host in the middle - -```bash -ssh -t reachable_host ssh unreachable_host -``` - -###### Run command over SSH on remote host - -```bash -cat > cmd.txt << __EOF__ -cat /etc/hosts -__EOF__ - -ssh host -l user $(&1 | tee -a "${_sesdir}/$(date +%Y%m%d).log" - -} - -# Alias: -alias ssh='_ssh_sesslog' -``` - -###### Using Keychain for SSH logins - -```bash -### Delete all of ssh-agent's keys. -function _scl() { - - /usr/bin/keychain --clear - -} - -### Add key to keychain. -function _scg() { - - /usr/bin/keychain /path/to/private-key - source "$HOME/.keychain/$HOSTNAME-sh" - -} -``` - -###### SSH login without processing any login scripts - -```bash -ssh -tt user@host bash -``` - -###### SSH local port forwarding - -Example 1: - -```bash -# Forwarding our local 2250 port to nmap.org:443 from localhost through localhost -host1> ssh -L 2250:nmap.org:443 localhost - -# Connect to the service: -host1> curl -Iks --location -X GET https://localhost:2250 -``` - -Example 2: - -```bash -# Forwarding our local 9051 port to db.d.x:5432 from localhost through node.d.y -host1> ssh -nNT -L 9051:db.d.x:5432 node.d.y - -# Connect to the service: -host1> psql -U db_user -d db_dev -p 9051 -h localhost -``` - - * `-n` - redirects stdin from `/dev/null` - * `-N` - do not execute a remote command - * `-T` - disable pseudo-terminal allocation - -###### SSH remote port forwarding - -```bash -# Forwarding our local 9051 port to db.d.x:5432 from host2 through node.d.y -host1> ssh -nNT -R 9051:db.d.x:5432 node.d.y - -# Connect to the service: -host2> psql -U postgres -d postgres -p 8000 -h localhost -``` - -___ - -##### Tool: [linux-dev](https://www.tldp.org/LDP/abs/html/devref1.html) - -###### Testing remote connection to port - -```bash -timeout 1 bash -c "//" >/dev/null 2>&1 ; echo $? -``` - - * `` - set remote host - * `` - set destination port - -###### Read and write to TCP or UDP sockets with common bash tools - -```bash -exec 5<>/dev/tcp//; cat <&5 & cat >&5; exec 5>&- -``` - -___ - -##### Tool: [tcpdump](http://www.tcpdump.org/) - -###### Filter incoming (on interface) traffic (specific ) - -```bash -tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443 -``` - - * `-n` - don't convert addresses (`-nn` will not resolve hostnames or ports) - * `-e` - print the link-level headers - * `-i [iface|any]` - set interface - * `-Q|-D [in|out|inout]` - choose send/receive direction (`-D` - for old tcpdump versions) - * `host [ip|hostname]` - set host, also `[host not]` - * `[and|or]` - set logic - * `port [1-65535]` - set port number, also `[port not]` - -###### Filter incoming (on interface) traffic (specific ) and write to a file - -```bash -tcpdump -ne -i eth0 -Q in host 192.168.252.1 and port 443 -c 5 -w tcpdump.pcap -``` - - * `-c [num]` - capture only num number of packets - * `-w [filename]` - write packets to file, `-r [filename]` - reading from file - -###### Capture all ICMP packets - -```bash -tcpdump -nei eth0 icmp -``` - -###### Check protocol used (TCP or UDP) for service - -```bash -tcpdump -nei eth0 tcp port 22 -vv -X | egrep "TCP|UDP" -``` - -###### Display ASCII text (to parse the output using grep or other) - -```bash -tcpdump -i eth0 -A -s0 port 443 -``` - -###### Grab everything between two keywords - -```bash -tcpdump -i eth0 port 80 -X | sed -n -e '/username/,/=ldap/ p' -``` - -###### Grab user and pass ever plain http - -```bash -tcpdump -i eth0 port http -l -A | egrep -i \ -'pass=|pwd=|log=|login=|user=|username=|pw=|passw=|passwd=|password=|pass:|user:|username:|password:|login:|pass |user ' \ ---color=auto --line-buffered -B20 -``` - -###### Extract HTTP User Agent from HTTP request header - -```bash -tcpdump -ei eth0 -nn -A -s1500 -l | grep "User-Agent:" -``` - -###### Capture only HTTP GET and POST packets - -```bash -tcpdump -ei eth0 -s 0 -A -vv \ -'tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x47455420' or 'tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x504f5354' -``` - -or simply: - -```bash -tcpdump -ei eth0 -s 0 -v -n -l | egrep -i "POST /|GET /|Host:" -``` - -###### Rotate capture files - -```bash -tcpdump -ei eth0 -w /tmp/capture-%H.pcap -G 3600 -C 200 -``` - - * `-G ` - pcap will be created every `` seconds - * `-C ` - close the current pcap and open a new one if is larger than `` - -###### Top hosts by packets - -```bash -tcpdump -ei enp0s25 -nnn -t -c 200 | cut -f 1,2,3,4 -d '.' | sort | uniq -c | sort -nr | head -n 20 -``` - -###### Excludes any RFC 1918 private address - -```bash -tcpdump -nei eth0 'not (src net (10 or 172.16/12 or 192.168/16) and dst net (10 or 172.16/12 or 192.168/16))' -``` - -___ - -##### Tool: [tcpick](http://tcpick.sourceforge.net/) - -###### Analyse packets in real-time - -```bash -while true ; do tcpick -a -C -r dump.pcap ; sleep 2 ; clear ; done -``` - -___ - -##### Tool: [ngrep](http://ngrep.sourceforge.net/usage.html) - -```bash -ngrep -d eth0 "www.domain.com" port 443 -``` - - * `-d [iface|any]` - set interface - * `[domain]` - set hostname - * `port [1-65535]` - set port number - -```bash -ngrep -d eth0 "www.domain.com" src host 10.240.20.2 and port 443 -``` - - * `(host [ip|hostname])` - filter by ip or hostname - * `(port [1-65535])` - filter by port number - -```bash -ngrep -d eth0 -qt -O ngrep.pcap "www.domain.com" port 443 -``` - - * `-q` - quiet mode (only payloads) - * `-t` - added timestamps - * `-O [filename]` - save output to file, `-I [filename]` - reading from file - -```bash -ngrep -d eth0 -qt 'HTTP' 'tcp' -``` - - * `HTTP` - show http headers - * `tcp|udp` - set protocol - * `[src|dst] host [ip|hostname]` - set direction for specific node - -```bash -ngrep -l -q -d eth0 -i "User-Agent: curl*" -``` - - * `-l` - stdout line buffered - * `-i` - case-insensitive search - -___ - -##### Tool: [hping3](http://www.hping.org/) - -```bash -hping3 -V -p 80 -s 5050 www.google.com -``` - - * `-V|--verbose` - verbose mode - * `-p|--destport` - set destination port - * `-s|--baseport` - set source port - * `` - set scan type - * `-F|--fin` - set FIN flag, port open if no reply - * `-S|--syn` - set SYN flag - * `-P|--push` - set PUSH flag - * `-A|--ack` - set ACK flag (use when ping is blocked, RST response back if the port is open) - * `-U|--urg` - set URG flag - * `-Y|--ymas` - set Y unused flag (0x80 - nullscan), port open if no reply - * `-M 0 -UPF` - set TCP sequence number and scan type (URG+PUSH+FIN), port open if no reply - -```bash -hping3 -V -c 1 -1 -C 8 www.google.com -``` - - * `-c [num]` - packet count - * `-1` - set ICMP mode - * `-C|--icmptype [icmp-num]` - set icmp type (default icmp-echo = 8) - -```bash -hping3 -V -c 1000000 -d 120 -S -w 64 -p 80 --flood --rand-source -``` - - * `--flood` - sent packets as fast as possible (don't show replies) - * `--rand-source` - random source address mode - * `-d --data` - data size - * `-w|--win` - winsize (default 64) - -___ - -##### Tool: [nmap](https://nmap.org/) - -###### Ping scans the network - -```bash -nmap -sP 192.168.0.0/24 -``` - -###### Show only open ports - -```bash -nmap -F --open 192.168.0.0/24 -``` - -###### Full TCP port scan using with service version detection - -```bash -nmap -p 1-65535 -sV -sS -T4 192.168.0.0/24 -``` - -###### Nmap scan and pass output to Nikto - -```bash -nmap -p80,443 192.168.0.0/24 -oG - | nikto.pl -h - -``` - -###### Recon specific ip:service with Nmap NSE scripts stack - -```bash -# Set variables: -_hosts="192.168.250.10" -_ports="80,443" - -# Set Nmap NSE scripts stack: -_nmap_nse_scripts="+dns-brute,\ - +http-auth-finder,\ - +http-chrono,\ - +http-cookie-flags,\ - +http-cors,\ - +http-cross-domain-policy,\ - +http-csrf,\ - +http-dombased-xss,\ - +http-enum,\ - +http-errors,\ - +http-git,\ - +http-grep,\ - +http-internal-ip-disclosure,\ - +http-jsonp-detection,\ - +http-malware-host,\ - +http-methods,\ - +http-passwd,\ - +http-phpself-xss,\ - +http-php-version,\ - +http-robots.txt,\ - +http-sitemap-generator,\ - +http-shellshock,\ - +http-stored-xss,\ - +http-title,\ - +http-unsafe-output-escaping,\ - +http-useragent-tester,\ - +http-vhosts,\ - +http-waf-detect,\ - +http-waf-fingerprint,\ - +http-xssed,\ - +traceroute-geolocation.nse,\ - +ssl-enum-ciphers,\ - +whois-domain,\ - +whois-ip" - -# Set Nmap NSE script params: -_nmap_nse_scripts_args="dns-brute.domain=${_hosts},http-cross-domain-policy.domain-lookup=true," -_nmap_nse_scripts_args+="http-waf-detect.aggro,http-waf-detect.detectBodyChanges," -_nmap_nse_scripts_args+="http-waf-fingerprint.intensive=1" - -# Perform scan: -nmap --script="$_nmap_nse_scripts" --script-args="$_nmap_nse_scripts_args" -p "$_ports" "$_hosts" -``` - -___ - -##### Tool: [netcat](http://netcat.sourceforge.net/) - -```bash -nc -kl 5000 -``` - - * `-l` - listen for an incoming connection - * `-k` - listening after client has disconnected - * `>filename.out` - save receive data to file (optional) - -```bash -nc 192.168.0.1 5051 < filename.in -``` - - * `< filename.in` - send data to remote host - -```bash -nc -vz 10.240.30.3 5000 -``` - - * `-v` - verbose output - * `-z` - scan for listening daemons - -```bash -nc -vzu 10.240.30.3 1-65535 -``` - - * `-u` - scan only udp ports - -###### Transfer data file (archive) - -```bash -server> nc -l 5000 | tar xzvfp - -client> tar czvfp - /path/to/dir | nc 10.240.30.3 5000 -``` - -###### Launch remote shell - -```bash -# 1) -server> nc -l 5000 -e /bin/bash -client> nc 10.240.30.3 5000 - -# 2) -server> rm -f /tmp/f; mkfifo /tmp/f -server> cat /tmp/f | /bin/bash -i 2>&1 | nc -l 127.0.0.1 5000 > /tmp/f -client> nc 10.240.30.3 5000 -``` - -###### Simple file server - -```bash -while true ; do nc -l 5000 | tar -xvf - ; done -``` - -###### Simple minimal HTTP Server - -```bash -while true ; do nc -l -p 1500 -c 'echo -e "HTTP/1.1 200 OK\n\n $(date)"' ; done -``` - -###### Simple HTTP Server - - > Restarts web server after each request - remove `while` condition for only single connection. - -```bash -cat > index.html << __EOF__ - - - - - - - - - - -

- - Hello! It's a site. - -

- - - -__EOF__ -``` - -```bash -server> while : ; do \ -(echo -ne "HTTP/1.1 200 OK\r\nContent-Length: $(wc -c /" <"$_sent" & -sed "s/^/<= /" <"$_recv" & - -nc -l -p "$_listen_port" <"$_back" | \ -tee "$_sent" | \ -nc "$_bk_host" "$_bk_port" | \ -tee "$_recv" >"$_back" -``` - -```bash -server> chmod +x nc-proxy && ./nc-proxy 8080 192.168.252.10:8000 - lport: 8080 -bk_host: 192.168.252.10 -bk_port: 8000 - -client> http -p h 10.240.30.3:8080 -HTTP/1.1 200 OK -Accept-Ranges: bytes -Cache-Control: max-age=31536000 -Content-Length: 2748 -Content-Type: text/html; charset=utf-8 -Date: Sun, 01 Jul 2018 20:12:08 GMT -Last-Modified: Sun, 01 Apr 2018 21:53:37 GMT -``` - -###### Create a single-use TCP or UDP proxy - -```bash -### TCP -> TCP -nc -l -p 2000 -c "nc [ip|hostname] 3000" - -### TCP -> UDP -nc -l -p 2000 -c "nc -u [ip|hostname] 3000" - -### UDP -> UDP -nc -l -u -p 2000 -c "nc -u [ip|hostname] 3000" - -### UDP -> TCP -nc -l -u -p 2000 -c "nc [ip|hostname] 3000" -``` - -___ - -##### Tool: [gnutls-cli](https://gnutls.org/manual/html_node/gnutls_002dcli-Invocation.html) - -###### Testing connection to remote host (with SNI support) - -```bash -gnutls-cli -p 443 google.com -``` - -###### Testing connection to remote host (without SNI support) - -```bash -gnutls-cli --disable-sni -p 443 google.com -``` - -___ - -##### Tool: [socat](http://www.dest-unreach.org/socat/doc/socat.html) - -###### Testing remote connection to port - -```bash -socat - TCP4:10.240.30.3:22 -``` - - * `-` - standard input (STDIO) - * `TCP4:` - set tcp4 connection with specific params - * `[hostname|ip]` - set hostname/ip - * `[1-65535]` - set port number - -###### Redirecting TCP-traffic to a UNIX domain socket under Linux - -```bash -socat TCP-LISTEN:1234,bind=127.0.0.1,reuseaddr,fork,su=nobody,range=127.0.0.0/8 UNIX-CLIENT:/tmp/foo -``` - - * `TCP-LISTEN:` - set tcp listen with specific params - * `[1-65535]` - set port number - * `bind=[hostname|ip]` - set bind hostname/ip - * `reuseaddr` - allows other sockets to bind to an address - * `fork` - keeps the parent process attempting to produce more connections - * `su=nobody` - set user - * `range=[ip-range]` - ip range - * `UNIX-CLIENT:` - communicates with the specified peer socket - * `filename` - define socket - -___ - -##### Tool: [p0f](http://lcamtuf.coredump.cx/p0f3/) - -###### Set iface in promiscuous mode and dump traffic to the log file - -```bash -p0f -i enp0s25 -p -d -o /dump/enp0s25.log -``` - - * `-i` - listen on the specified interface - * `-p` - set interface in promiscuous mode - * `-d` - fork into background - * `-o` - output file - -___ - -##### Tool: [netstat](https://en.wikipedia.org/wiki/Netstat) - -###### Graph # of connections for each hosts - -```bash -netstat -an | awk '/ESTABLISHED/ { split($5,ip,":"); if (ip[1] !~ /^$/) print ip[1] }' | \ -sort | uniq -c | awk '{ printf("%s\t%s\t",$2,$1) ; for (i = 0; i < $1; i++) {printf("*")}; print "" }' -``` - -###### Monitor open connections for specific port including listen, count and sort it per IP - -```bash -watch "netstat -plan | grep :443 | awk {'print \$5'} | cut -d: -f 1 | sort | uniq -c | sort -nk 1" -``` - -###### Grab banners from local IPv4 listening ports - -```bash -netstat -nlt | grep 'tcp ' | grep -Eo "[1-9][0-9]*" | xargs -I {} sh -c "echo "" | nc -v -n -w1 127.0.0.1 {}" -``` - -___ - -##### Tool: [rsync](https://en.wikipedia.org/wiki/Rsync) - -###### Rsync remote data as root using sudo - -```bash -rsync --rsync-path 'sudo rsync' username@hostname:/path/to/dir/ /local/ -``` - -___ - -##### Tool: [host](https://en.wikipedia.org/wiki/Host_(Unix)) - -###### Resolves the domain name (using external dns server) - -```bash -host google.com 9.9.9.9 -``` - -###### Checks the domain administrator (SOA record) - -```bash -host -t soa google.com 9.9.9.9 -``` - -___ - -##### Tool: [dig](https://en.wikipedia.org/wiki/Dig_(command)) - -###### Resolves the domain name (short output) - -```bash -dig google.com +short -``` - -###### Lookup NS record for specific domain - -```bash -dig @9.9.9.9 google.com NS -``` - -###### Query only answer section - -```bash -dig google.com +nocomments +noquestion +noauthority +noadditional +nostats -``` - -###### Query ALL DNS Records - -```bash -dig google.com ANY +noall +answer -``` - -###### DNS Reverse Look-up - -```bash -dig -x 172.217.16.14 +short -``` - -___ - -##### Tool: [certbot](https://certbot.eff.org/) - -###### Generate multidomain certificate - -```bash -certbot certonly -d example.com -d www.example.com -``` - -###### Generate wildcard certificate - -```bash -certbot certonly --manual --preferred-challenges=dns -d example.com -d *.example.com -``` - -###### Generate certificate with 4096 bit private key - -```bash -certbot certonly -d example.com -d www.example.com --rsa-key-size 4096 -``` - -___ - -##### Tool: [network-other](https://github.com/trimstray/the-book-of-secret-knowledge#tool-network-other) - -###### Get all subnets for specific AS (Autonomous system) - -```bash -AS="AS32934" -whois -h whois.radb.net -- "-i origin ${AS}" | \ -grep "^route:" | \ -cut -d ":" -f2 | \ -sed -e 's/^[ \t]//' | \ -sort -n -t . -k 1,1 -k 2,2 -k 3,3 -k 4,4 | \ -cut -d ":" -f2 | \ -sed -e 's/^[ \t]/allow /' | \ -sed 's/$/;/' | \ -sed 's/allow */subnet -> /g' -``` - -###### Resolves domain name from dns.google.com with curl and jq - -```bash -_dname="google.com" ; curl -s "https://dns.google.com/resolve?name=${_dname}&type=A" | jq . -``` - -##### Tool: [git](https://git-scm.com/) - -###### Log alias for a decent view of your repo - -```bash -# 1) -git log --oneline --decorate --graph --all - -# 2) -git log --graph \ ---pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' \ ---abbrev-commit -``` - -___ - -##### Tool: [python](https://www.python.org/) - -###### Static HTTP web server - -```bash -# Python 3.x -python3 -m http.server 8000 --bind 127.0.0.1 - -# Python 2.x -python -m SimpleHTTPServer 8000 -``` - -###### Static HTTP web server with SSL support - -```bash -# Python 3.x -from http.server import HTTPServer, BaseHTTPRequestHandler -import ssl - -httpd = HTTPServer(('localhost', 4443), BaseHTTPRequestHandler) - -httpd.socket = ssl.wrap_socket (httpd.socket, - keyfile="path/to/key.pem", - certfile='path/to/cert.pem', server_side=True) - -httpd.serve_forever() - -# Python 2.x -import BaseHTTPServer, SimpleHTTPServer -import ssl - -httpd = BaseHTTPServer.HTTPServer(('localhost', 4443), - SimpleHTTPServer.SimpleHTTPRequestHandler) - -httpd.socket = ssl.wrap_socket (httpd.socket, - keyfile="path/tp/key.pem", - certfile='path/to/cert.pem', server_side=True) - -httpd.serve_forever() -``` - -###### Encode base64 - -```bash -python -m base64 -e <<< "sample string" -``` - -###### Decode base64 - -```bash -python -m base64 -d <<< "dGhpcyBpcyBlbmNvZGVkCg==" -``` - -##### Tool: [awk](http://www.grymoire.com/Unix/Awk.html) - -###### Search for matching lines - -```bash -# egrep foo -awk '/foo/' filename -``` - -###### Search non matching lines - -```bash -# egrep -v foo -awk '!/foo/' filename -``` - -###### Print matching lines with numbers - -```bash -# egrep -n foo -awk '/foo/{print FNR,$0}' filename -``` - -###### Print the last column - -```bash -awk '{print $NF}' filename -``` - -###### Find all the lines longer than 80 characters - -```bash -awk 'length($0)>80{print FNR,$0}' filename -``` - -###### Print only lines of less than 80 characters - -```bash -awk 'length < 80' filename -``` - -###### Print double new lines a file - -```bash -awk '1; { print "" }' filename -``` - -###### Print line numbers - -```bash -awk '{ print FNR "\t" $0 }' filename -awk '{ printf("%5d : %s\n", NR, $0) }' filename # in a fancy manner -``` - -###### Print line numbers for only non-blank lines - -```bash -awk 'NF { $0=++a " :" $0 }; { print }' filename -``` - -###### Print the line and the next two (i=5) lines after the line matching regexp - -```bash -awk '/foo/{i=5+1;}{if(i){i--; print;}}' filename -``` - -###### Print the lines starting at the line matching 'server {' until the line matching '}' - -```bash -awk '/server {/,/}/' filename -``` - -###### Print multiple columns with separators - -```bash -awk -F' ' '{print "ip:\t" $2 "\n port:\t" $3' filename -``` - -###### Remove empty lines - -```bash -awk 'NF > 0' filename - -# alternative: -awk NF filename -``` - -###### Delete trailing white space (spaces, tabs) - -```bash -awk '{sub(/[ \t]*$/, "");print}' filename -``` - -###### Delete leading white space - -```bash -awk '{sub(/^[ \t]+/, ""); print}' filename -``` - -###### Remove duplicate consecutive lines - -```bash -# uniq -awk 'a !~ $0{print}; {a=$0}' filename -``` - -###### Remove duplicate entries in a file without sorting - -```bash -awk '!x[$0]++' filename -``` - -###### Exclude multiple columns - -```bash -awk '{$1=$3=""}1' filename -``` - -###### Substitute foo for bar on lines matching regexp - -```bash -awk '/regexp/{gsub(/foo/, "bar")};{print}' filename -``` - -###### Add some characters at the beginning of matching lines - -```bash -awk '/regexp/{sub(/^/, "++++"); print;next;}{print}' filename -``` - -###### Get the last hour of Apache logs - -```bash -awk '/'$(date -d "1 hours ago" "+%d\\/%b\\/%Y:%H:%M")'/,/'$(date "+%d\\/%b\\/%Y:%H:%M")'/ { print $0 }' \ -/var/log/httpd/access_log -``` - -___ - -##### Tool: [sed](http://www.grymoire.com/Unix/Sed.html) - -###### Print a specific line from a file - -```bash -sed -n 10p /path/to/file -``` - -###### Remove a specific line from a file - -```bash -sed -i 10d /path/to/file -# alternative (BSD): sed -i'' 10d /path/to/file -``` - -###### Remove a range of lines from a file - -```bash -sed -i -re ',d' -``` - -###### Replace newline(s) with a space - -```bash -sed ':a;N;$!ba;s/\n/ /g' /path/to/file - -# cross-platform compatible syntax: -sed -e ':a' -e 'N' -e '$!ba' -e 's/\n/ /g' /path/to/file -``` - -- `:a` create a label `a` -- `N` append the next line to the pattern space -- `$!` if not the last line, ba branch (go to) label `a` -- `s` substitute, `/\n/` regex for new line, `/ /` by a space, `/g` global match (as many times as it can) - -Alternatives: - -```bash -# perl version (sed-like speed): -perl -p -e 's/\n/ /' /path/to/file - -# bash version (slow): -while read line ; do printf "%s" "$line " ; done < file -``` - -###### Delete string +N next lines - -```bash -sed '/start/,+4d' /path/to/file -``` - -___ - -##### Tool: [grep](http://www.grymoire.com/Unix/Grep.html) - -###### Search for a "pattern" inside all files in the current directory - -```bash -grep -rn "pattern" -grep -RnisI "pattern" * -fgrep "pattern" * -R -``` - -###### Show only for multiple patterns - -```bash -grep 'INFO*'\''WARN' filename -grep 'INFO\|WARN' filename -grep -e INFO -e WARN filename -grep -E '(INFO|WARN)' filename -egrep "INFO|WARN" filename -``` - -###### Except multiple patterns - -```bash -grep -vE '(error|critical|warning)' filename -``` - -###### Show data from file without comments - -```bash -grep -v ^[[:space:]]*# filename -``` - -###### Show data from file without comments and new lines - -```bash -egrep -v '#|^$' filename -``` - -###### Show strings with a dash/hyphen - -```bash -grep -e -- filename -grep -- -- filename -grep "\-\-" filename -``` - -###### Remove blank lines from a file and save output to new file - -```bash -grep . filename > newfilename -``` - -##### Tool: [perl](https://www.perl.org/) - -###### Search and replace (in place) - -```bash -perl -i -pe's/SEARCH/REPLACE/' filename -``` - -###### Edit of `*.conf` files changing all foo to bar (and backup original) - -```bash -perl -p -i.orig -e 's/\bfoo\b/bar/g' *.conf -``` - -###### Prints the first 20 lines from `*.conf` files - -```bash -perl -pe 'exit if $. > 20' *.conf -``` - -###### Search lines 10 to 20 - -```bash -perl -ne 'print if 10 .. 20' filename -``` - -###### Delete first 10 lines (and backup original) - -```bash -perl -i.orig -ne 'print unless 1 .. 10' filename -``` - -###### Delete all but lines between foo and bar (and backup original) - -```bash -perl -i.orig -ne 'print unless /^foo$/ .. /^bar$/' filename -``` - -###### Reduce multiple blank lines to a single line - -```bash -perl -p -i -00pe0 filename -``` - -###### Convert tabs to spaces (1t = 2sp) - -```bash -perl -p -i -e 's/\t/ /g' filename -``` - -###### Read input from a file and report number of lines and characters - -```bash -perl -lne '$i++; $in += length($_); END { print "$i lines, $in characters"; }' filename -``` - -#### Shell Tricks  [[TOC]](#anger-table-of-contents) - -When you get a shell, it is generally not very clean, but after following these steps, you will have a fairly clean and comfortable shell to work with. - -1) `script /dev/null -c bash` -2) Ctrl-Z (to send it to background) -3) `stty raw -echo; fg` (returns the shell to foreground) -4) `reset` (to reset terminal) -5) `xterm` (when asked for terminal type) -6) `export TERM=xterm; export SHELL=bash` - -#### Shell functions  [[TOC]](#anger-table-of-contents) - -##### Table of Contents - -- [Domain resolve](#domain-resolve) -- [Get ASN](#get-asn) - -###### Domain resolve - -```bash -# Dependencies: -# - curl -# - jq - -function DomainResolve() { - - local _host="$1" - - local _curl_base="curl --request GET" - local _timeout="15" - - _host_ip=$($_curl_base -ks -m "$_timeout" "https://dns.google.com/resolve?name=${_host}&type=A" | \ - jq '.Answer[0].data' | tr -d "\"" 2>/dev/null) - - if [[ -z "$_host_ip" ]] || [[ "$_host_ip" == "null" ]] ; then - - echo -en "Unsuccessful domain name resolution.\\n" - - else - - echo -en "$_host > $_host_ip\\n" - - fi - -} -``` - -Example: - -```bash -shell> DomainResolve nmap.org -nmap.org > 45.33.49.119 - -shell> DomainResolve nmap.org -Unsuccessful domain name resolution. -``` - -###### Get ASN - -```bash -# Dependencies: -# - curl - -function GetASN() { - - local _ip="$1" - - local _curl_base="curl --request GET" - local _timeout="15" - - _asn=$($_curl_base -ks -m "$_timeout" "http://ip-api.com/line/${_ip}?fields=as") - - _state=$(echo $?) - - if [[ -z "$_ip" ]] || [[ "$_ip" == "null" ]] || [[ "$_state" -ne 0 ]]; then - - echo -en "Unsuccessful ASN gathering.\\n" - - else - - echo -en "$_ip > $_asn\\n" - - fi - -} -``` - -Example: - -```bash -shell> GetASN 1.1.1.1 -1.1.1.1 > AS13335 Cloudflare, Inc. - -shell> GetASN 0.0.0.0 -Unsuccessful ASN gathering. -```