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- <p align="center">
- <img src="https://github.com/trimstray/the-book-of-secret-knowledge/blob/master/doc/img/the-book-of-secret-knowledge-preview.png"
- alt="Master">
- </p>
-
- <h4 align="center">A collection of awesome lists, manuals, blogs, hacks, one-liners, cli/web tools and more.</h4>
-
- <br>
-
- <p align="center">
- <a href="https://github.com/trimstray/the-book-of-secret-knowledge/tree/master">
- <img src="https://img.shields.io/badge/Branch-master-green.svg?longCache=true"
- alt="Branch">
- </a>
- <a href="http://www.gnu.org/licenses/">
- <img src="https://img.shields.io/badge/License-GNU-blue.svg?longCache=true"
- alt="License">
- </a>
- </p>
-
- <div align="center">
- <sub>Created by
- <a href="https://twitter.com/trimstray">trimstray</a> and
- <a href="https://github.com/trimstray/the-book-of-secret-knowledge/graphs/contributors">
- contributors
- </a>
- </div>
-
- <br>
-
- ***
-
- ## :notebook_with_decorative_cover: What is it?
-
- This list is a collection of various materials that I use every day in my work. It contains a lot of useful information gathered in one piece.
-
- ## :restroom: For whom?
-
- It is intended for everyone and anyone - especially for System and Network Administrators, DevOps, Pentesters or Security Researchers.
-
- ## :information_source: Contributing
-
- 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 add pull request please see **[this](https://github.com/trimstray/the-book-of-secret-knowledge/blob/master/CONTRIBUTING.md)**. All **suggestions/PR** are welcome!
-
- ## :gift_heart: Support
-
- If this project is useful and important for you or if you really like _the-book-of-secret-knowledge_, you can bring me **more positive energy**, give me some **good words** or support my **[ethereum](https://www.blockchain.com/eth/address/0xfF14C70D0E112E424AA6484DBaF32Fbc55ce2Acf)**/**[bitcoin](https://www.blockchain.com/btc/address/1QLRgnhGWc8Qf8wxqmpz2NohLDjL5Bncf8)** wallets maybe. Thank you!
-
- ## :ballot_box_with_check: Todo
-
- - [ ] Add useful shell functions
- - [ ] Add one-liners for collection tools (eg. CLI Tools)
-
- ## :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)**
- - **[Manuals/Howtos/Tutorials](#manualshowtostutorials-toc)**
- - **[Awesome Lists](#awesome-lists-toc)**
- - **[Blogs](#blogs-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)**
- - **[One-liners](#one-liners-toc)**
-
- ## :trident: The Book of Secret Knowledge (Chapters)
-
- #### CLI Tools [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Shells
-
- <p>
- :small_orange_diamond: <a href="https://ohmyz.sh/"><b>Oh My ZSH!</b></a> - the best framework for managing your Zsh configuration.<br>
- :small_orange_diamond: <a href="https://github.com/Bash-it/bash-it"><b>bash-it</b></a> - framework for using, developing and maintaining shell scripts and custom commands for your daily work.<br>
- :small_orange_diamond: <a href="https://github.com/oh-my-fish/oh-my-fish"><b>Oh My Fish</b></a> - the Fishshell framework.<br>
- </p>
-
- ##### :black_small_square: Managers
-
- <p>
- :small_orange_diamond: <a href="https://midnight-commander.org/"><b>Midnight Commander</b></a> - visual file manager, licensed under GNU General Public License.<br>
- :small_orange_diamond: <a href="https://www.gnu.org/software/screen/"><b>screen</b></a> - full-screen window manager that multiplexes a physical terminal.<br>
- :small_orange_diamond: <a href="https://github.com/tmux/tmux/wiki"><b>tmux</b></a> - terminal multiplexer, lets you switch easily between several programs in one terminal.<br>
- :small_orange_diamond: <a href="https://github.com/dennishafemann/tmux-cssh"><b>tmux-cssh</b></a> - sets a comfortable and easy to use functionality, clustering and synchronizing virtual tmux-sessions.<br>
- </p>
-
- ##### :black_small_square: Text editors
-
- <p>
- :small_orange_diamond: <a href="http://ex-vi.sourceforge.net/"><b>vi</b></a> - is one of the most common text editors on Unix.<br>
- :small_orange_diamond: <a href="https://www.vim.org/"><b>vim</b></a> - is a highly configurable text editor.<br>
- :small_orange_diamond: <a href="https://www.gnu.org/software/emacs/"><b>emacs</b></a> - an extensible, customizable, free/libre text editor - and more.<br>
- </p>
-
- ##### :black_small_square: Network
-
- <p>
- :small_orange_diamond: <a href="https://nmap.org/"><b>nmap</b></a> - free and open source (license) utility for network discovery and security auditing.<br>
- :small_orange_diamond: <a href="https://github.com/robertdavidgraham/masscan"><b>masscan</b></a> - the fastest Internet port scanner, spews SYN packets asynchronously.<br>
- :small_orange_diamond: <a href="https://github.com/gvb84/pbscan"><b>pbscan</b></a> - faster and more efficient stateless SYN scanner and banner grabber.<br>
- :small_orange_diamond: <a href="http://www.hping.org/"><b>hping</b></a> - command-line oriented TCP/IP packet assembler/analyzer.<br>
- :small_orange_diamond: <a href="https://github.com/traviscross/mtr"><b>mtr</b></a> - functionality of the 'traceroute' and 'ping' programs in a single network diagnostic tool.<br>
- :small_orange_diamond: <a href="http://netcat.sourceforge.net/"><b>netcat</b></a> - networking utility which reads and writes data across network connections, using the TCP/IP protocol.<br>
- :small_orange_diamond: <a href="https://www.tcpdump.org/"><b>tcpdump</b></a> - powerful command-line packet analyzer.<br>
- :small_orange_diamond: <a href="https://www.wireshark.org/docs/man-pages/tshark.html"><b>tshark</b></a> - dump and analyze network traffic (wireshark cli).<br>
- :small_orange_diamond: <a href="https://github.com/jpr5/ngrep"><b>ngrep</b></a> - is like GNU grep applied to the network layer.<br>
- :small_orange_diamond: <a href="https://github.com/tgraf/bmon"><b>bmon</b></a> - monitoring and debugging tool to capture networking related statistics and prepare them visually.<br>
- :small_orange_diamond: <a href="http://iptraf.seul.org/2.6/manual.html#installation"><b>iptraf-ng</b></a> - is a console-based network monitoring program for Linux that displays information about IP traffic.<br>
- :small_orange_diamond: <a href="https://iperf.fr/"><b>iPerf3</b></a> - is a tool for active measurements of the maximum achievable bandwidth on IP networks.<br>
- :small_orange_diamond: <a href="https://github.com/Microsoft/Ethr"><b>ethr</b></a> - is a Network Performance Measurement Tool for TCP, UDP & HTTP.<br>
- :small_orange_diamond: <a href="https://github.com/jwbensley/Etherate"><b>Etherate</b></a> - is a Linux CLI based Ethernet and MPLS traffic testing tool.<br>
- :small_orange_diamond: <a href="https://github.com/troglobit/nemesis"><b>Nemesis</b></a> - packet manipulation CLI tool; craft and inject packets of several protocols.<br>
- :small_orange_diamond: <a href="https://github.com/packetfu/packetfu"><b>packetfu</b></a> - a mid-level packet manipulation library for Ruby.<br>
- :small_orange_diamond: <a href="https://scapy.net/"><b>Scapy</b></a> - packet manipulation library; forge, send, decode, capture packets of a wide number of protocols.<br>
- :small_orange_diamond: <a href="https://aria2.github.io/"><b>aria2</b></a> - is a lightweight multi-protocol & multi-source command-line download utility.<br>
- </p>
-
- ##### :black_small_square: Network (DNS)
-
- <p>
- :small_orange_diamond: <a href="https://github.com/mschwager/fierce"><b>fierce</b></a> - a DNS reconnaissance tool for locating non-contiguous IP space.<br>
- :small_orange_diamond: <a href="https://github.com/aboul3la/Sublist3r"><b>sublist3r</b></a> - fast subdomains enumeration tool for penetration testers.<br>
- :small_orange_diamond: <a href="https://github.com/OWASP/Amass"><b>amass</b></a> - tool obtains subdomain names by scraping data sources, crawling web archives and more.<br>
- :small_orange_diamond: <a href="https://github.com/google/namebench"><b>namebench</b></a> - provides personalized DNS server recommendations based on your browsing history.<br>
- :small_orange_diamond: <a href="https://github.com/jedisct1/dnscrypt-proxy"><b>dnscrypt-proxy 2</b></a> - a flexible DNS proxy, with support for encrypted DNS protocols.<br>
- </p>
-
- ##### :black_small_square: Network (HTTP)
-
- <p>
- :small_orange_diamond: <a href="https://curl.haxx.se/"><b>Curl</b></a> - command line tool and library for transferring data with URLs.<br>
- :small_orange_diamond: <a href="https://gitlab.com/davidjpeacock/kurly"><b>kurly</b></a> - is an alternative to the widely popular curl program, written in Golang.<br>
- :small_orange_diamond: <a href="https://github.com/jkbrzt/httpie"><b>HTTPie</b></a> - a user-friendly HTTP client.<br>
- :small_orange_diamond: <a href="https://github.com/asciimoo/wuzz"><b>wuzz</b></a> - interactive cli tool for HTTP inspection.<br>
- :small_orange_diamond: <a href="https://github.com/trimstray/htrace.sh"><b>htrace.sh</b></a> - shell script to debugging http/https; ssllabs, mozilla observatory, testssl.sh and nmap nse support.<br>
- :small_orange_diamond: <a href="https://github.com/reorx/httpstat"><b>httpstat</b></a> - visualizes curl statistics in a way of beauty and clarity.<br>
- :small_orange_diamond: <a href="https://lynx.browser.org/"><b>Lynx</b></a> - is a text browser for the World Wide Web.<br>
- :small_orange_diamond: <a href="https://www.joedog.org/siege-home/"><b>siege</b></a> - is an http load testing and benchmarking utility.<br>
- :small_orange_diamond: <a href="https://github.com/wg/wrk"><b>wrk</b></a> - is a modern HTTP benchmarking tool capable of generating significant load.<br>
- :small_orange_diamond: <a href="https://github.com/codesenberg/bombardier"><b>bombardier</b></a> - fast cross-platform HTTP benchmarking tool written in Go.<br>
- :small_orange_diamond: <a href="https://github.com/cmpxchg16/gobench"><b>gobench</b></a> - http/https load testing and benchmarking tool.<br>
- :small_orange_diamond: <a href="https://github.com/OJ/gobuster"><b>gobuster</b></a> - free and open source directory/file & DNS busting tool written in Go.<br>
- </p>
-
- ##### :black_small_square: SSL/Security
-
- <p>
- :small_orange_diamond: <a href="https://www.openssl.org/"><b>openssl</b></a> - is a robust, commercial-grade, and full-featured toolkit for the TLS and SSL protocols.<br>
- :small_orange_diamond: <a href="https://gnutls.org/manual/html_node/gnutls_002dcli-Invocation.html"><b>gnutls-cli</b></a> - client program to set up a TLS connection to some other computer.<br>
- :small_orange_diamond: <a href="https://github.com/nabla-c0d3/sslyze"><b>sslyze
- </b></a> - fast and powerful SSL/TLS server scanning library.<br>
- :small_orange_diamond: <a href="https://github.com/rbsec/sslscan"><b>sslscan</b></a> - tests SSL/TLS enabled services to discover supported cipher suites.<br>
- :small_orange_diamond: <a href="https://github.com/drwetter/testssl.sh"><b>testssl.sh</b></a> - testing TLS/SSL encryption anywhere on any port.<br>
- :small_orange_diamond: <a href="http://www.tarsnap.com/spiped.html"><b>spiped</b></a> - is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses.<br>
- :small_orange_diamond: <a href="https://github.com/certbot/certbot"><b>Certbot</b></a> - is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server.<br>
- :small_orange_diamond: <a href="https://github.com/FiloSottile/mkcert"><b>mkcert</b></a> - simple zero-config tool to make locally trusted development certificates with any names you'd like.<br>
- </p>
-
- ##### :black_small_square: Auditing Tools
-
- <p>
- :small_orange_diamond: <a href="https://cisofy.com/lynis/"><b>Lynis</b></a> - battle-tested security tool for systems running Linux, macOS, or Unix-based operating system.<br>
- :small_orange_diamond: <a href="https://github.com/rebootuser/LinEnum"><b>LinEnum</b></a> - scripted Local Linux Enumeration & Privilege Escalation Checks.<br>
- :small_orange_diamond: <a href="https://github.com/installation/rkhunter"><b>Rkhunter</b></a> - scanner tool for Linux systems that scans backdoors, rootkits and local exploits on your systems.<br>
- :small_orange_diamond: <a href="https://github.com/hasherezade/pe-sieve"><b>PE-sieve</b></a> - is a light-weight tool that helps to detect malware running on the system.<br>
- </p>
-
- ##### :black_small_square: System Diagnostics/Debuggers
-
- <p>
- :small_orange_diamond: <a href="https://github.com/strace/strace"><b>strace</b></a> - diagnostic, debugging and instructional userspace utility for Linux.<br>
- :small_orange_diamond: <a href="http://dtrace.org/blogs/about/"><b>DTrace</b></a> - is a performance analysis and troubleshooting tool.<br>
- :small_orange_diamond: <a href="https://en.wikipedia.org/wiki/Ltrace"><b>ltrace</b></a> - is a library call tracer, used to trace calls made by programs to library functions.<br>
- :small_orange_diamond: <a href="https://github.com/draios/sysdig"><b>sysdig</b></a> - system exploration and troubleshooting tool with first class support for containers.<br>
- :small_orange_diamond: <a href="http://www.valgrind.org/"><b>Valgrind</b></a> - is an instrumentation framework for building dynamic analysis tools.<br>
- :small_orange_diamond: <a href="https://nicolargo.github.io/glances/"><b>glances</b></a> - cross-platform system monitoring tool written in Python.<br>
- :small_orange_diamond: <a href="https://github.com/hishamhm/htop"><b>htop</b></a> - interactive text-mode process viewer for Unix systems. It aims to be a better 'top'.<br>
- :small_orange_diamond: <a href="https://www.atoptool.nl/"><b>atop</b></a> - ASCII performance monitor. Includes statistics for CPU, memory, disk, swap, network, and processes.<br>
- :small_orange_diamond: <a href="https://en.wikipedia.org/wiki/Lsof"><b>lsof</b></a> - displays in its output information about files that are opened by processes.<br>
- :small_orange_diamond: <a href="http://www.brendangregg.com/flamegraphs.html"><b>FlameGraph</b></a> - stack trace visualizer.<br>
- :small_orange_diamond: <a href="https://github.com/zevv/lsofgraph"><b>lsofgraph</b></a> - small utility to convert Unix lsof output to a graph showing FIFO and UNIX interprocess communication.<br>
- :small_orange_diamond: <a href="https://github.com/sharkdp/hexyl"><b>hexyl</b></a> - a command-line hex viewer.<br>
-
- </p>
-
- ##### :black_small_square: Log Analyzers
-
- <p>
- :small_orange_diamond: <a href="https://goaccess.io/"><b>GoAccess</b></a> - real-time web log analyzer and interactive viewer that runs in a terminal.<br>
- :small_orange_diamond: <a href="https://github.com/lebinh/ngxtop"><b>ngxtop</b></a> - real-time metrics for nginx server.<br>
- </p>
-
- ##### :black_small_square: Databases
-
- <p>
- :small_orange_diamond: <a href="https://github.com/xo/usql"><b>usql</b></a> - universal command-line interface for SQL databases.<br>
- :small_orange_diamond: <a href="https://github.com/dbcli/pgcli"><b>pgcli</b></a> - postgres CLI with autocompletion and syntax highlighting.<br>
- :small_orange_diamond: <a href="https://github.com/dbcli/mycli"><b>mycli</b></a> - terminal client for MySQL with autocompletion and syntax highlighting.<br>
- </p>
-
- ##### :black_small_square: TOR
-
- <p>
- :small_orange_diamond: <a href="https://github.com/GouveaHeitor/nipe"><b>Nipe</b></a> - script to make Tor Network your default gateway.<br>
- :small_orange_diamond: <a href="https://github.com/trimstray/multitor"><b>multitor</b></a> - a tool that lets you create multiple TOR instances with a load-balancing.<br>
- </p>
-
- ##### :black_small_square: Other
-
- <p>
- :small_orange_diamond: <a href="http://inotify.aiken.cz/"><b>incron</b></a> - is an inode-based filesystem notification technology.<br>
- :small_orange_diamond: <a href="https://github.com/rgburke/grv"><b>GRV</b></a> - is a terminal based interface for viewing Git repositories.<br>
- :small_orange_diamond: <a href="https://github.com/tldr-pages/tldr"><b>tldr</b></a> - simplified and community-driven man pages.<br>
- </p>
-
- #### GUI Tools [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Terminal emulators
-
- <p>
- :small_orange_diamond: <a href="https://github.com/Guake/guake"><b>Guake</b></a> - is a dropdown terminal made for the GNOME desktop environment.<br>
- :small_orange_diamond: <a href="https://gnometerminator.blogspot.com/p/introduction.html"><b>Terminator</b></a> - is based on GNOME Terminal, useful features for sysadmins and other users.<br>
- </p>
-
- ##### :black_small_square: Network
-
- <p>
- :small_orange_diamond: <a href="https://www.wireshark.org/"><b>Wireshark</b></a> - is the world’s foremost and widely-used network protocol analyzer.<br>
- </p>
-
- ##### :black_small_square: Browsers
-
- <p>
- :small_orange_diamond: <a href="https://www.torproject.org/projects/torbrowser.html.en"><b>TOR Browser</b></a> - protect your privacy and defend yourself against network surveillance and traffic analysis.<br>
- </p>
-
- ##### :black_small_square: Password Managers
-
- <p>
- :small_orange_diamond: <a href="https://keepassxc.org/"><b>KeePassXC</b></a> - store your passwords safely and auto-type them into your everyday websites and apps.<br>
- :small_orange_diamond: <a href="https://www.enpass.io/"><b>Enpass</b></a> - password manager and secure wallet.<br>
- </p>
-
- ##### :black_small_square: Messengers (end-to-end encryption)
-
- <p>
- :small_orange_diamond: <a href="https://www.signal.org/"><b>Signal</b></a> - is an encrypted communications app.<br>
- :small_orange_diamond: <a href="https://wire.com/en/"><b>Wire</b></a> - secure messaging, file sharing, voice calls and video conferences. All protected with end-to-end encryption.<br>
- </p>
-
- ##### :black_small_square: Text editors
-
- <p>
- :small_orange_diamond: <a href="https://www.sublimetext.com/3"><b>Sublime Text</b></a> - is a lightweight, cross-platform code editor known for its speed, ease of use.<br>
- :small_orange_diamond: <a href="https://code.visualstudio.com/"><b>Visual Studio Code</b></a> - an open-source and free source code editor developed by Microsoft.<br>
- :small_orange_diamond: <a href="https://atom.io/"><b>Atom</b></a> - a hackable text editor for the 21st Century.<br>
- </p>
-
- #### Web Tools [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Browsers
-
- <p>
- :small_orange_diamond: <a href="https://caniuse.com/#home"><b>Can I use</b></a> - provides up-to-date browser support tables for support of front-end web technologies.<br>
- :small_orange_diamond: <a href="https://panopticlick.eff.org/"><b>Panopticlick 3.0</b></a> - is your browser safe against tracking?<br>
- :small_orange_diamond: <a href="https://privacy.net/analyzer/"><b>Privacy Analyzer</b></a> - see what data is exposed from your browser.<br>
- :small_orange_diamond: <a href="https://browserleaks.com/"><b>Web Browser Security</b></a> - it's all about Web Browser fingerprinting.<br>
- :small_orange_diamond: <a href="https://www.howsmyssl.com/"><b>How's My SSL?</b></a> - was originally made to help a web server developer learn what real world TLS clients were capable of.<br>
- </p>
-
- ##### :black_small_square: SSL/Security
-
- <p>
- :small_orange_diamond: <a href="https://www.ssllabs.com/ssltest/"><b>SSL Server Test</b></a> - free online service performs a deep analysis of the configuration of any SSL web server.<br>
- :small_orange_diamond: <a href="https://dev.ssllabs.com/ssltest/"><b>SSL Server Test (DEV)</b></a> - free online service performs a deep analysis of the configuration of any SSL web server.<br>
- :small_orange_diamond: <a href="https://www.htbridge.com/ssl/"><b>ImmuniWeb® SSLScan</b></a> - test SSL/TLS (PCI DSS, HIPAA and NIST).<br>
- :small_orange_diamond: <a href="https://sslanalyzer.comodoca.com/"><b>COMODO SSL Analyzer</b></a> - ssl analyzer and ssl certificate checker.<br>
- :small_orange_diamond: <a href="https://www.jitbit.com/sslcheck/"><b>SSL Check</b></a> - scan your website for non-secure content.<br>
- :small_orange_diamond: <a href="https://urlscan.io/"><b>urlscan.io</b></a> - service to scan and analyse websites.<br>
- :small_orange_diamond: <a href="https://report-uri.com/home/tools"><b>Report URI</b></a> - monitoring security policies like CSP and HPKP.<br>
- :small_orange_diamond: <a href="https://csp-evaluator.withgoogle.com/"><b>CSP Evaluator</b></a> - allows developers and security experts to check if a Content Security Policy.<br>
- :small_orange_diamond: <a href="https://uselesscsp.com/"><b>Useless CSP</b></a> - public list about CSP in some big players (might make them care a bit more).<br>
- :small_orange_diamond: <a href="https://whynohttps.com/"><b>Why No HTTPS?</b></a> - list of the world's top 100 websites by Alexa rank not automatically redirecting insecure requests.<br>
- :small_orange_diamond: <a href="https://cipherli.st/"><b>cipherli.st</b></a> - strong ciphers for Apache, Nginx, Lighttpd and more.<br>
- :small_orange_diamond: <a href="https://badssl.com/"><b>badssl.com</b></a> - memorable site for testing clients against bad SSL configs.<br>
- :small_orange_diamond: <a href="https://tlsfun.de/"><b>tlsfun.de</b></a> - registered for various tests regarding the TLS/SSL protocol.<br>
- :small_orange_diamond: <a href="https://ccadb.org/resources"><b>Common CA Database</b></a> - repository of information about CAs, and their root and intermediate certificates.<br>
- :small_orange_diamond: <a href="https://certstream.calidog.io/"><b>CERTSTREAM</b></a> - real-time certificate transparency log update stream.<br>
- :small_orange_diamond: <a href="https://crt.sh/"><b>crt.sh</b></a> - discovers certificates by continually monitoring all of the publicly known CT.<br>
- :small_orange_diamond: <a href="https://www.hardenize.com/"><b>Hardenize</b></a> - deploy the security standards.<br>
- </p>
-
- ##### :black_small_square: HTTP Headers & Web Linters
-
- <p>
- :small_orange_diamond: <a href="https://securityheaders.com/"><b>Security Headers</b></a> - analyse the HTTP response headers (with rating system to the results).<br>
- :small_orange_diamond: <a href="https://observatory.mozilla.org/"><b>Observatory by Mozilla</b></a> - set of tools to analyze your website.<br>
- :small_orange_diamond: <a href="https://webhint.io/"><b>webhint</b></a> - is a linting tool that will help you with your site's accessibility, speed, security and more.<br>
- </p>
-
- ##### :black_small_square: DNS
-
- <p>
- :small_orange_diamond: <a href="http://viewdns.info/"><b>ViewDNS</b></a> - one source for free DNS related tools and information.<br>
- :small_orange_diamond: <a href="https://dnslytics.com/"><b>DNSlytics</b></a> - online investigation tool.<br>
- :small_orange_diamond: <a href="https://dnsspy.io/"><b>DNS Spy</b></a> - monitor, validate and verify your DNS configurations.<br>
- :small_orange_diamond: <a href="https://findsubdomains.com/"><b>Find subdomains online</b></a> - find subdomains for security assessment penetration test.<br>
- :small_orange_diamond: <a href="https://dnsdumpster.com/"><b>DNSdumpster</b></a> - dns recon & research, find & lookup dns records.<br>
- :small_orange_diamond: <a href="https://dnstable.com/"><b>DNS Table online</b></a> - search for DNS records by domain, IP, CIDR, ISP.<br>
- :small_orange_diamond: <a href="http://ptrarchive.com/"><b>PTRarchive.com</b></a> - this site is responsible for the safekeeping of historical reverse DNS records.<br>
- :small_orange_diamond: <a href="http://xip.io/"><b>xip.ip</b></a> - wildcard DNS for everyone.<br>
- :small_orange_diamond: <a href="https://intodns.com/"><b>intoDNS</b></a> - DNS and mail server health checker.<br>
- :small_orange_diamond: <a href="http://leafdns.com/"><b>Leaf DNS</b></a> - comprehensive DNS tester.<br>
- :small_orange_diamond: <a href="https://ceipam.eu/en/dnslookup.php"><b>dnslookup (ceipam)</b></a> - one of the best DNS propagation checker (and not only).<br>
- :small_orange_diamond: <a href="https://whatsmydns.com"><b>What's My DNS</b></a> - DNS propagation checking tool.<br>
-
- </p>
-
- ##### :black_small_square: Mail
-
- <p>
- :small_orange_diamond: <a href="https://mxtoolbox.com/SuperTool.aspx"><b>MX Toolbox</b></a> - all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.<br>
- :small_orange_diamond: <a href="http://www.blacklistalert.org/"><b>blacklistalert</b></a> - checks to see if your domain is on a Real Time Spam Blacklist.<br>
- :small_orange_diamond: <a href="http://multirbl.valli.org/"><b>MultiRBL</b></a> - complete IP check for sending Mailservers.<br>
- :small_orange_diamond: <a href="http://dkimvalidator.com/"><b>DKIM SPF & Spam Assassin Validator</b></a> - checks mail authentication and scores messages with Spam Assassin.<br>
- </p>
-
- ##### :black_small_square: Encoders/Decoders and Regex testing
-
- <p>
- :small_orange_diamond: <a href="https://www.url-encode-decode.com/"><b>URL Encode/Decode</b></a> - tool from above to either encode or decode a string of text.<br>
- :small_orange_diamond: <a href="https://uncoder.io/"><b>Uncoder</b></a> - the online translator for search queries on log data.<br>
- :small_orange_diamond: <a href="https://regex101.com/"><b>Regex101</b></a> - online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript.<br>
- :small_orange_diamond: <a href="https://regexr.com/"><b>RegExr</b></a> - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).<br>
- :small_orange_diamond: <a href="https://www.regextester.com/"><b>RegEx Testing</b></a> - online regex testing tool.<br>
- :small_orange_diamond: <a href="https://www.regexpal.com/"><b>RegEx Pal</b></a> - online regex testing tool + other tools.<br>
- :small_orange_diamond: <a href="https://gchq.github.io/CyberChef/"><b>CyberChef</b></a> - The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis.<br>
- </p>
-
- ##### :black_small_square: Net-tools
-
- <p>
- :small_orange_diamond: <a href="https://toolbar.netcraft.com/site_report"><b>Netcraft</b></a> - detailed report about the site, helping you to make informed choices about their integrity.<br>
- :small_orange_diamond: <a href="https://www.ripe.net/"><b>RIPE NCC</b></a> - not-for-profit membership association, a Regional Internet Registry and the secretariat for the RIPE.<br>
- :small_orange_diamond: <a href="https://www.robtex.com/"><b>Robtex</b></a> - uses various sources to gather public information about IP numbers, domain names, host names, routes etc.<br>
- :small_orange_diamond: <a href="https://securitytrails.com/"><b>Security Trails</b></a> - APIs for Security Companies, Researchers and Teams.<br>
- :small_orange_diamond: <a href="https://tools.keycdn.com/curl"><b>Online Curl</b></a> - curl test, analyze HTTP Response Headers.<br>
- :small_orange_diamond: <a href="http://ping.eu/"><b>Ping.eu</b></a> - online Ping, Traceroute, DNS lookup, WHOIS and others.<br>
- :small_orange_diamond: <a href="https://network-tools.com/"><b>Network-Tools</b></a> - network tools for webmasters, IT technicians & geeks.<br>
- :small_orange_diamond: <a href="https://www.virustotal.com/#/home/upload"><b>VirusTotal</b></a> - analyze suspicious files and URLs to detect types of malware.<br>
- </p>
-
- ##### :black_small_square: Privacy
-
- <p>
- :small_orange_diamond: <a href="https://www.privacytools.io/"><b>privacytools.io</b></a> - provides knowledge and tools to protect your privacy against global mass surveillance.<br>
- :small_orange_diamond: <a href="https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Test+Servers"><b>DNS Privacy Test Servers</b></a> - DNS privacy recursive servers list (with a 'no logging' policy).<br>
- </p>
-
- ##### :black_small_square: Code parsers/playgrounds
-
- <p>
- :small_orange_diamond: <a href="https://www.shellcheck.net/"><b>ShellCheck</b></a> - finds bugs in your shell scripts.<br>
- :small_orange_diamond: <a href="https://explainshell.com/"><b>explainshell</b></a> - get interactive help texts for shell commands.<br>
- :small_orange_diamond: <a href="https://jsbin.com/?html,output"><b>jsbin</b></a> - live pastebin for HTML, CSS & JavaScript and more.<br>
- :small_orange_diamond: <a href="https://codepen.io/pen"><b>CodePen</b></a> - a social development environment for front-end designers and developers.<br>
- :small_orange_diamond: <a href="https://codesandbox.io/"><b>CodeSandbox</b></a> - online code editor for web application development. Supports React, Vue, Angular, CxJS, Dojo, etc.<br>
- :small_orange_diamond: <a href="http://sandbox.onlinephpfunctions.com/"><b>PHP Sandbox</b></a> - test your PHP code with this code tester.<br>
- :small_orange_diamond: <a href="https://www.repl.it/"><b>Repl.it</b></a> - an instant IDE to learn, build, collaborate, and host all in one place.<br>
- </p>
-
- ##### :black_small_square: Performance
-
- <p>
- :small_orange_diamond: <a href="https://gtmetrix.com/"><b>GTmetrix</b></a> - analyze your site’s speed and make it faster.<br>
- :small_orange_diamond: <a href="https://performance.sucuri.net/"><b>Sucuri loadtimetester</b></a> - test here the
- performance of any of your sites from across the globe.<br>
- :small_orange_diamond: <a href="https://tools.pingdom.com/"><b>Pingdom Tools</b></a> - analyze your site’s speed around the world.<br>
- :small_orange_diamond: <a href="https://pingme.io/"><b>PingMe.io</b></a> - run website latency tests across multiple geographic regions.<br>
- :small_orange_diamond: <a href="https://developers.google.com/speed/pagespeed/insights/"><b>PageSpeed Insights</b></a> - analyze your site’s speed and make it faster.<br>
- :small_orange_diamond: <a href="https://web.dev/"><b>web.dev</b></a> - helps developers like you learn and apply the web's modern capabilities to your own sites and apps.<br>
- </p>
-
- ##### :black_small_square: Mass scanners (search engines)
-
- <p>
- :small_orange_diamond: <a href="https://censys.io/"><b>Censys</b></a> - platform that helps information security practitioners discover, monitor, and analyze devices.<br>
- :small_orange_diamond: <a href="https://www.shodan.io/"><b>Shodan</b></a> - the world's first search engine for Internet-connected devices.<br>
- :small_orange_diamond: <a href="https://2000.shodan.io/#/"><b>Shodan 2000</b></a> - do you use Shodan for everyday work? This tool looks for randomly generated data from Shodan.<br>
- :small_orange_diamond: <a href="https://viz.greynoise.io/table"><b>GreyNoise</b></a> - mass scanner such as Shodan and Censys.<br>
- :small_orange_diamond: <a href="https://www.zoomeye.org/"><b>ZoomEye</b></a> - search engine for cyberspace that lets the user find specific network components.<br>
- :small_orange_diamond: <a href="https://fofa.so/"><b>FOFA</b></a> - is a cyberspace search engine.<br>
- :small_orange_diamond: <a href="https://www.onyphe.io/"><b>onyphe</b></a> - is a search engine for open-source and cyber threat intelligence data collected.<br>
- :small_orange_diamond: <a href="https://app.binaryedge.io/"><b>binaryedge</b></a> - it scan the entire internet space and create real-time threat intelligence streams and reports.<br>
- :small_orange_diamond: <a href="https://hunter.io/"><b>hunter</b></a> - lets you find email addresses in seconds and connect with the people that matter for your business.<br>
- :small_orange_diamond: <a href="https://wigle.net/"><b>wigle</b></a> - is a submission-based catalog of wireless networks. All the networks. Found by Everyone.<br>
- :small_orange_diamond: <a href="https://publicwww.com/"><b>PublicWWW</b></a> - find any alphanumeric snippet, signature or keyword in the web pages HTML, JS and CSS code.<br>
- :small_orange_diamond: <a href="https://inteltechniques.com/menu.html"><b>IntelTechniques</b></a> - this repository contains hundreds of online search utilities.<br>
- :small_orange_diamond: <a href="https://ghostproject.fr/"><b>GhostProject?</b></a> - search by full email address or username. <br>
- :small_orange_diamond: <a href="https://buckets.grayhatwarfare.com/"><b>Buckets by Grayhatwarfar</b></a> - database with public search for Open Amazon S3 Buckets and their contents.<br>
- :small_orange_diamond: <a href="https://vigilante.pw/"><b>Vigilante.pw</b></a> - the breached database directory.<br>
- :small_orange_diamond: <a href="https://www.databreaches.live/"><b>databreaches</b></a> - was my email affected by data breach?<br>
- :small_orange_diamond: <a href="https://builtwith.com/"><b>builtwith</b></a> - find out what websites are built with.<br>
- :small_orange_diamond: <a href="http://www.mmnt.net/"><b>Mamont's open FTP Index</b></a> - if a target has an open FTP site with accessible content it will be listed here.<br>
- :small_orange_diamond: <a href="http://index-of.es/"><b>index-of</b></a> - contains great stuff like: security, hacking, reverse engineering, cryptography, programming etc.<br>
- :small_orange_diamond: <a href="https://osintframework.com/"><b>OSINT Framework</b></a> - focused on gathering information from free tools or resources.<br>
- :small_orange_diamond: <a href="https://pipl.com/"><b>pipl</b></a> - is the place to find the person behind the email address, social username or phone number.<br>
- :small_orange_diamond: <a href="https://abuse.ch/"><b>abuse.ch</b></a> - is operated by a random swiss guy fighting malware for non-profit.<br>
- </p>
-
- ##### :black_small_square: Passwords
-
- <p>
- :small_orange_diamond: <a href="https://gotcha.pw/"><b>Gotcha?</b></a> - list of 1.4 billion accounts circulates around the Internet.<br>
- :small_orange_diamond: <a href="https://haveibeenpwned.com/"><b>have i been pwned?</b></a> - check if you have an account that has been compromised in a data breach.<br>
- </p>
-
- ##### :black_small_square: CVE/Exploits databases
-
- <p>
- :small_orange_diamond: <a href="https://cve.mitre.org/"><b>CVE Mitre</b></a> - list of publicly known cybersecurity vulnerabilities.<br>
- :small_orange_diamond: <a href="https://www.cvedetails.com/"><b>CVE Details</b></a> - CVE security vulnerability advanced database.<br>
- :small_orange_diamond: <a href="https://www.exploit-db.com/"><b>Exploit DB</b></a> - CVE compliant archive of public exploits and corresponding vulnerable software.<br>
- :small_orange_diamond: <a href="https://0day.today/"><b>0day.today</b></a> - exploits market provides you the possibility to buy zero-day exploits and also to sell 0day exploits.<br>
- :small_orange_diamond: <a href="https://sploitus.com/"><b>sploitus</b></a> - the exploit and tools database.<br>
- :small_orange_diamond: <a href="https://cxsecurity.com/exploit/"><b>cxsecurity</b></a> - free vulnerability database.<br>
- </p>
-
- ##### :black_small_square: Mobile apps scanners
-
- <p>
- :small_orange_diamond: <a href="https://www.htbridge.com/mobile/"><b>ImmuniWeb® Mobile App Scanner</b></a> - test security and privacy of mobile apps (iOS & Android).<br>
- :small_orange_diamond: <a href="https://vulnerabilitytest.quixxi.com/"><b>Quixxi</b></a> - free Mobile App Vulnerability Scanner for Android & iOS.<br>
- :small_orange_diamond: <a href="https://www.ostorlab.co/scan/mobile/"><b>Ostorlab</b></a> - analyzes mobile application to identify vulnerabilities and potential weaknesses.<br>
- </p>
-
- ##### :black_small_square: Private Search Engines
-
- <p>
- :small_orange_diamond: <a href="https://www.startpage.com/"><b>Startpage</b></a> - the world's most private search engine.<br>
- :small_orange_diamond: <a href="https://searx.me/"><b>searX</b></a> - a privacy-respecting, hackable metasearch engine.<br>
- </p>
-
- ##### :black_small_square: Secure WebMail Providers
-
- <p>
- :small_orange_diamond: <a href="https://countermail.com/"><b>CounterMail</b></a> - is a secure and easy to use online email service, designed to provide maximum security and privacy.<br>
- :small_orange_diamond: <a href="http://mail2tor.com/"><b>Mail2Tor</b></a> - is a Tor Hidden Service that allows anyone to send and receive emails anonymously.<br>
- :small_orange_diamond: <a href="https://tutanota.com/"><b>Tutanota</b></a> - is the world's most secure email service and amazingly easy to use.<br>
- :small_orange_diamond: <a href="https://protonmail.com/"><b>Protonmail</b></a> - is the world's largest secure email service, developed by CERN and MIT scientists.<br>
- :small_orange_diamond: <a href="https://www.startmail.com/en/"><b>Startmail</b></a> - private & encrypted email made easy.<br>
- </p>
-
- ##### :black_small_square: Crypto
-
- <p>
- :small_orange_diamond: <a href="https://keybase.io/"><b>Keybase</b></a> - it's open source and powered by public-key cryptography.<br>
- </p>
-
- ##### :black_small_square: PGP Keyservers
-
- <p>
- :small_orange_diamond: <a href="https://keyserver.ubuntu.com/"><b>SKS OpenPGP Key server</b></a> - includes a highly-efficient reconciliation algorithm for keeping the keyservers synchronized.<br>
- </p>
-
- #### Systems/Services [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Operating Systems
-
- <p>
- :small_orange_diamond: <a href="http://www.slackware.com/"><b>Slackware</b></a> - the most "Unix-like" Linux distribution.<br>
- :small_orange_diamond: <a href="https://www.openbsd.org/"><b>OpenBSD</b></a> - multi-platform 4.4BSD-based UNIX-like operating system.<br>
- :small_orange_diamond: <a href="https://hardenedbsd.org/"><b>HardenedBSD</b></a> - HardenedBSD aims to implement innovative exploit mitigation and security solutions.<br>
- :small_orange_diamond: <a href="https://www.kali.org/"><b>Kali Linux</b></a> - Linux distribution used for Penetration Testing, Ethical Hacking and network security assessments.<br>
- :small_orange_diamond: <a href="https://backbox.org/"><b>Backbox Linux</b></a> - penetration test and security assessment oriented Ubuntu-based Linux distribution.<br>
- :small_orange_diamond: <a href="https://blackarch.org/"><b>BlackArch</b></a> - is an Arch Linux-based penetration testing distribution for penetration testers and security researchers.<br>
- :small_orange_diamond: <a href="https://securityonion.net/"><b>Security Onion</b></a> - Linux distro for intrusion detection, enterprise security monitoring, and log management.<br>
- :small_orange_diamond: <a href="https://tails.boum.org/"><b>Tails</b></a> - is a live system that aims to preserve your privacy and anonymity.<br>
- </p>
-
- ##### :black_small_square: HTTP(s) Services
-
- <p>
- :small_orange_diamond: <a href="https://varnish-cache.org/"><b>Varnish Cache</b></a> - HTTP accelerator designed for content-heavy dynamic web sites.<br>
- :small_orange_diamond: <a href="https://nginx.org/"><b>Nginx</b></a> - open source web and reverse proxy server that is similar to Apache, but very light weight.<br>
- :small_orange_diamond: <a href="https://www.haproxy.org/"><b>HAProxy</b></a> - the reliable, high performance TCP/HTTP load balancer.<br>
- </p>
-
- ##### :black_small_square: Security/hardening
-
- <p>
- :small_orange_diamond: <a href="https://emeraldonion.org/"><b>Emerald Onion</b></a> - seattle-based encrypted-transit internet service provider.<br>
- :small_orange_diamond: <a href="https://www.unbound.net/"><b>Unbound</b></a> - validating, recursive, and caching DNS resolver (with TLS).<br>
- :small_orange_diamond: <a href="https://www.knot-resolver.cz/"><b>Knot Resolver</b></a> - caching full resolver implementation, including both a resolver library and a daemon.<br>
- :small_orange_diamond: <a href="https://github.com/pi-hole/pi-hole"><b>pi-hole</b></a> - the Pi-hole® is a DNS sinkhole that protects your devices from unwanted content.<br>
- :small_orange_diamond: <a href="https://github.com/stamparm/maltrail"><b>maltrail</b></a> - malicious traffic detection system.<br>
- :small_orange_diamond: <a href="https://github.com/Netflix/security_monkey"><b>security_monkey</b></a> - monitors AWS, GCP, OpenStack, and GitHub orgs for assets and their changes over time.<br>
- </p>
-
- #### Networks [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Tools
-
- <p>
- :small_orange_diamond: <a href="https://www.capanalysis.net/ca/"><b>CapAnalysis</b></a> - web visual tool to analyze large amounts of captured network traffic (PCAP analyzer).<br>
- </p>
-
- ##### :black_small_square: Labs
-
- <p>
- :small_orange_diamond: <a href="https://labs.networkreliability.engineering/"><b>NRE Labs</b></a> - learn automation by doing it. Right now, right here, in your browser.<br>
- </p>
-
- #### Manuals/Howtos/Tutorials [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Shells/Command line
-
- <p>
- :small_orange_diamond: <a href="https://github.com/dylanaraps/pure-bash-bible"><b>pure-bash-bible</b></a> - a collection of pure bash alternatives to external processes.<br>
- :small_orange_diamond: <a href="http://wiki.bash-hackers.org/start"><b>The Bash Hackers Wiki</b></a> - hold documentation of any kind about GNU Bash.<br>
- :small_orange_diamond: <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/contents.html"><b>Shell & Utilities</b></a> - describes the commands and utilities offered to application programs by POSIX-conformant systems.<br>
- :small_orange_diamond: <a href="https://github.com/jlevy/the-art-of-command-line"><b>the-art-of-command-line</b></a> - master the command line, in one page.<br>
- </p>
-
- ##### :black_small_square: Python
-
- <p>
- :small_orange_diamond: <a href="https://awesome-python.com/"><b>Awesome Python</b></a> - a curated list of awesome Python frameworks, libraries, software and resources.<br>
- </p>
-
- ##### :black_small_square: Sed & Awk & Other
-
- <p>
- :small_orange_diamond: <a href="https://posts.specterops.io/fawk-yeah-advanced-sed-and-awk-usage-parsing-for-pentesters-3-e5727e11a8ad?gi=c8f9506b26b6"><b>F’Awk Yeah!</b></a> - advanced sed and awk usage (Parsing for Pentesters 3).<br>
- </p>
-
- ##### :black_small_square: \*nix & Network
-
- <p>
- :small_orange_diamond: <a href="https://www.cyberciti.biz/"><b>nixCraft</b></a> - linux and unix tutorials for new and seasoned sysadmin.<br>
- :small_orange_diamond: <a href="https://www.tecmint.com/"><b>TecMint</b></a> - the ideal Linux blog for Sysadmins & Geeks.<br>
- :small_orange_diamond: <a href="http://www.omnisecu.com/"><b>Omnisecu</b></a> - free Networking, System Administration and Security tutorials.<br>
- :small_orange_diamond: <a href="http://cb.vu/unixtoolbox.xhtml"><b>Unix Toolbox</b></a> - collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users.<br>
- :small_orange_diamond: <a href="https://linuxguideandhints.com/"><b>Linux Guide and Hints</b></a> - tutorials on system administration in Fedora® and CentOS®, including OpenLDAP and FreeIPA.<br>
- :small_orange_diamond: <a href="https://github.com/bagder/http2-explained"><b>http2-explained</b></a> - a detailed document explaining and documenting HTTP/2.<br>
- :small_orange_diamond: <a href="https://github.com/bagder/http3-explained"><b>http3-explained</b></a> - a document describing the HTTP/3 and QUIC protocols.<br>
- </p>
-
- ##### :black_small_square: Large-scale systems
-
- <p>
- :small_orange_diamond: <a href="https://github.com/donnemartin/system-design-primer"><b>The System Design Primer</b></a> - learn how to design large-scale systems.<br>
- :small_orange_diamond: <a href="https://github.com/binhnguyennus/awesome-scalability"><b>Awesome Scalability</b></a> - best practices in building High Scalability, High Availability, High Stability and more.<br>
- </p>
-
- ##### :black_small_square: System hardening
-
- <p>
- :small_orange_diamond: <a href="https://highon.coffee/blog/security-harden-centos-7/"><b>Security Harden CentOS 7</b></a> - this walks you through the steps required to security harden CentOS.<br>
- :small_orange_diamond: <a href="https://www.lisenet.com/2017/centos-7-server-hardening-guide/"><b>CentOS 7 Server Hardening Guide</b></a> - great guide for hardening CentOS; familiar with OpenSCAP.<br>
- </p>
-
- ##### :black_small_square: Security & Privacy
-
- <p>
- :small_orange_diamond: <a href="https://www.owasp.org/index.php/Main_Page"><b>OWASP</b></a> - worldwide not-for-profit charitable organization focused on improving the security of software.<br>
- :small_orange_diamond: <a href="https://www.owasp.org/index.php/Category:OWASP_Application_Security_Verification_Standard_Project"><b>OWASP ASVS 3.0.1</b></a> - OWASP Application Security Verification Standard Project.<br>
- :small_orange_diamond: <a href="https://github.com/Santandersecurityresearch/asvs"><b>OWASP ASVS 3.0.1 Web App</b></a> - simple web app that helps developers understand the ASVS requirements.<br>
- :small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_Testing_Project"><b>OWASP Testing Guide v4</b></a> - includes a "best practice" penetration testing framework.<br>
- :small_orange_diamond: <a href="http://www.hackingarticles.in/"><b>Hacking Articles</b></a> - LRaj Chandel's Security & Hacking Blog.<br>
- :small_orange_diamond: <a href="https://github.com/toniblyx/my-arsenal-of-aws-security-tools"><b>AWS security tools</b></a> - make your AWS cloud environment more secure.<br>
- :small_orange_diamond: <a href="https://inventory.rawsec.ml/index.html"><b>Rawsec's CyberSecurity Inventory</b></a> - an inventory of tools and resources about CyberSecurity.<br>
- :small_orange_diamond: <a href="https://appsecwiki.com/#/"><b>Application Security Wiki</b></a> - is an initiative to provide all application security related resources at one place.<br>
- :small_orange_diamond: <a href="https://tls.ulfheim.net/"><b>The Illustrated TLS Connection</b></a> - every byte of a TLS connection explained and reproduced.<br>
- :small_orange_diamond: <a href="https://github.com/ssllabs/research/wiki/SSL-and-TLS-Deployment-Best-Practices"><b>SSL Research</b></a> - SSL and TLS Deployment Best Practices by SSL Labs.<br>
- :small_orange_diamond: <a href="https://smallstep.com/blog/everything-pki.html"><b>Certificates and PKI</b></a> - everything you should know about certificates and PKI but are too afraid to ask.<br>
- :small_orange_diamond: <a href="https://appsecco.com/books/subdomain-enumeration/"><b>The Art of Subdomain Enumeration</b></a> - a reference for subdomain enumeration techniques.<br>
- :small_orange_diamond: <a href="https://lifehacker.com/the-comprehensive-guide-to-quitting-google-1830001964"><b>Quitting Google</b></a> - the comprehensive guide to quitting Google.<br>
- </p>
-
- ##### :black_small_square: Web Apps
-
- <p>
- :small_orange_diamond: <a href="https://infosec.mozilla.org/guidelines/web_security.html"><b>Mozilla Web Security</b></a> - help operational teams with creating secure web applications.<br>
- :small_orange_diamond: <a href="https://enable-cors.org/index.html"><b>Enable CORS</b></a> - enable cross-origin resource sharing.<br>
- </p>
-
- ##### :black_small_square: Other
-
- <p>
- :small_orange_diamond: <a href="https://bitvijays.github.io/LFC-VulnerableMachines.html"><b>CTF Series : Vulnerable Machines</b></a> - the steps below could be followed to find vulnerabilities and exploits.<br>
- :small_orange_diamond: <a href="https://hshrzd.wordpress.com/how-to-start/"><b>How to start RE/malware analysis?</b></a> - collection of some hints and useful links for the beginners.<br>
- :small_orange_diamond: <a href="https://lzone.de/cheat-sheet/"><b>LZone Cheat Sheets</b></a> - all cheat sheets.<br>
- :small_orange_diamond: <a href="https://github.com/rstacruz/cheatsheets"><b>Dan’s Cheat Sheets’s</b></a> - massive cheat sheets documentation.<br>
- :small_orange_diamond: <a href="https://devhints.io/"><b>Rico's cheatsheets</b></a> - this is a modest collection of cheatsheets.<br>
- :small_orange_diamond: <a href="http://www.kegel.com/c10k.html"><b>The C10K problem</b></a> - it's time for web servers to handle ten thousand clients simultaneously, don't you think?<br>
- :small_orange_diamond: <a href="https://bankgradesecurity.com/"><b>Bank Grade Security</b></a> - when companies say they have "Bank Grade Security" they imply that it is a good thing.<b>*</b><br>
- :small_orange_diamond: <a href="https://nickcraver.com/blog/2017/05/22/https-on-stack-overflow/"><b>HTTPS on Stack Overflow</b></a> - this is the story of a long journey regarding the implementation of SSL.<br>
- :small_orange_diamond: <a href="https://drawings.jvns.ca/"><b>Julia's Drawings</b></a> - some drawings about programming and unix world, zines about systems & debugging tools.<br>
- :small_orange_diamond: <a href="https://labs.ripe.net/Members/cteusche/bgp-meets-cat"><b>BGP Meets Cat</b></a> - after 3072 hours of manipulating BGP, Job Snijders has succeeded in drawing a Nyancat.<br>
- :small_orange_diamond: <a href="https://robertheaton.com/2018/11/28/https-in-the-real-world/"><b>HTTPS in the real world</b></a> - great tutorial explain how HTTPS works in the real world.<br>
- :small_orange_diamond: <a href="https://about.gitlab.com/2018/11/14/how-we-spent-two-weeks-hunting-an-nfs-bug/"><b>Gitlab and NFS bug</b></a> - how we spent two weeks hunting an NFS bug in the Linux kernel.<br>
- :small_orange_diamond: <a href="https://medium.com/@_bl4de/hidden-directories-and-files-as-a-source-of-sensitive-information-about-web-application-84e5c534e5ad"><b>Hidden directories and files</b></a> - as a source of sensitive information about web application.<br>
- :small_orange_diamond: <a href="http://www.catb.org/esr/faqs/hacker-howto.html"><b>How To Become A Hacker</b></a> - if you want to be a hacker, keep reading.<br>
- :small_orange_diamond: <a href="http://ithare.com/infographics-operation-costs-in-cpu-clock-cycles/"><b>Operation Costs in CPU</b></a> - an infographics which should help to estimate costs of certain operations in CPU clocks.<br>
- </p>
-
- #### Awesome Lists [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: SysOps/DevOps
-
- <p>
- :small_orange_diamond: <a href="https://github.com/kahun/awesome-sysadmin"><b>Awesome Sysadmin</b></a> - amazingly awesome open source sysadmin resources.<br>
- :small_orange_diamond: <a href="https://github.com/alebcay/awesome-shell"><b>Awesome Shell</b></a> - awesome command-line frameworks, toolkits, guides and gizmos.<br>
- :small_orange_diamond: <a href="https://github.com/learnbyexample/Command-line-text-processing"><b>Command-line-text-processing</b></a> - from finding text to search and replace, from sorting to beautifying text and more.<br>
- :small_orange_diamond: <a href="https://github.com/caesar0301/awesome-pcaptools"><b>Awesome Pcaptools</b></a> - collection of tools developed by other researchers to process network traces.<br>
- :small_orange_diamond: <a href="https://github.com/leandromoreira/linux-network-performance-parameters"><b>Linux Network Performance</b></a> - learn where some of the network sysctl variables fit into the Linux/Kernel network flow.<br>
- :small_orange_diamond: <a href="https://github.com/dhamaniasad/awesome-postgres"><b>Awesome Postgres</b></a> - list of awesome PostgreSQL software, libraries, tools and resources.<br>
- :small_orange_diamond: <a href="https://github.com/Kickball/awesome-selfhosted"><b>Awesome-Selfhosted</b></a> - list of Free Software network services and web applications which can be hosted locally.<br>
- </p>
-
- ##### :black_small_square: Developers
-
- <p>
- :small_orange_diamond: <a href="https://github.com/thedaviddias/Front-End-Checklist"><b>Front-End-Checklist</b></a> - the perfect Front-End Checklist for modern websites and meticulous developers.<br>
- </p>
-
- ##### :black_small_square: Security/Pentesting
-
- <p>
- :small_orange_diamond: <a href="https://github.com/qazbnm456/awesome-web-security"><b>Awesome Web Security</b></a> - a curated list of Web Security materials and resources.<br>
- :small_orange_diamond: <a href="https://github.com/joe-shenouda/awesome-cyber-skills"><b>awesome-cyber-skills</b></a> - a curated list of hacking environments where you can train your cyber skills.<br>
- :small_orange_diamond: <a href="https://github.com/infosecn1nja/Red-Teaming-Toolkit"><b>Red-Teaming-Toolkit</b></a> - a collection of open source and commercial tools that aid in red team operations.<br>
- :small_orange_diamond: <a href="https://github.com/snoopysecurity/awesome-burp-extensions"><b>awesome-burp-extensions</b></a> - a curated list of amazingly awesome Burp Extensions.<br>
- :small_orange_diamond: <a href="https://github.com/Hack-with-Github/Free-Security-eBooks"><b>Free Security eBooks</b></a> - list of a Free Security and Hacking eBooks.<br>
- :small_orange_diamond: <a href="https://github.com/k4m4/movies-for-hackers"><b>Movies for Hackers</b></a> - list of movies every hacker & cyberpunk must watch.<br>
- :small_orange_diamond: <a href="https://github.com/bl4de/security_whitepapers"><b>security_whitepapers</b></a> - collection of misc IT Security related whitepapers, presentations, slides.<br>
- :small_orange_diamond: <a href="https://github.com/trimstray/technical-whitepapers"><b>technical-whitepapers</b></a> - IT whitepapers; hacking, web app security, db, reverse engineering and more; EN/PL.<br>
- </p>
-
- #### Blogs [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Geeky Persons
-
- <p>
- :small_orange_diamond: <a href="http://www.brendangregg.com/"><b>Brendan Gregg's Blog</b></a> - Brendan Gregg is an industry expert in computing performance and cloud computing.<br>
- :small_orange_diamond: <a href="http://gynvael.coldwind.pl/"><b>Gynvael "GynDream" Coldwind</b></a> - Gynvael is a IT security engineer at Google.<br>
- :small_orange_diamond: <a href="http://lcamtuf.coredump.cx/"><b>Michał "lcamtuf" Zalewski</b></a> - "white hat" hacker, computer security expert.<br>
- :small_orange_diamond: <a href="https://ma.ttias.be/"><b>Mattias Geniar</b></a> - developer, Sysadmin, Blogger, Podcaster and Public Speaker.<br>
- :small_orange_diamond: <a href="https://nickcraver.com/"><b>Nick Craver</b></a> - Software Developer and Systems Administrator for Stack Exchange.<br>
- :small_orange_diamond: <a href="https://robert.penz.name/"><b>Robert Penz</b></a> - IT security Expert.<br>
- :small_orange_diamond: <a href="https://scotthelme.co.uk/"><b>Scott Helme</b></a> - Security Researcher, international speaker and founder of securityheaders.com and report-uri.com.<br>
- :small_orange_diamond: <a href="https://twitter.com/binitamshah"><b>Binni Shah</b></a> - Linux Evangelist. Malwares. Kernel Dev. Security Enthusiast.<br>
- :small_orange_diamond: <a href="https://security.szurek.pl/"><b>Kacper Szurek</b></a> - Detection Engineer at ESET.<br>
- :small_orange_diamond: <a href="https://www.troyhunt.com/"><b>Troy Hunt</b></a> - Microsoft Regional Director and Microsoft Most Valuable Professional for Developer Security.<br>
- :small_orange_diamond: <a href="https://raymii.org/s/index.html"><b>raymii.org</b></a> - Linux/Unix Sysadmin specializing in building high availability cloud environments.<br>
- </p>
-
- ##### :black_small_square: Geeky Blogs
-
- <p>
- :small_orange_diamond: <a href="https://linux-audit.com/"><b>Linux Audit</b></a> - the Linux security blog about Auditing, Hardening and Compliance by Michael Boelen.<br>
- :small_orange_diamond: <a href="https://linuxsecurity.expert/"><b>
- Linux Security Expert</b></a> - trainings, howtos, checklists, security tools and more.<br>
- :small_orange_diamond: <a href="http://www.grymoire.com/"><b>The Grymoire</b></a> - collection of useful incantations for wizards, be you computer wizards, magicians, or whatever.<br>
- </p>
-
- ##### :black_small_square: A piece of history
-
- <p>
- :small_orange_diamond: <a href="http://ftp.arl.army.mil/~mike/howto/"><b>How to Do Things at ARL</b></a> - how to configure modems, scan images, record CD-ROMs, and other useful techniques.<br>
- </p>
-
- #### Hacking/Penetration Testing [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: Pentesters arsenal tools
-
- <p>
- :small_orange_diamond: <a href="http://www.syhunt.com/sandcat/"><b>Sandcat Browser</b></a> - a penetration-oriented browser with plenty of advanced functionality already built in.<br>
- :small_orange_diamond: <a href="https://www.metasploit.com/"><b>Metasploit</b></a> - tool and framework for pentesting system, web and many more, contains a lot a ready to use exploit.<br>
- :small_orange_diamond: <a href="https://portswigger.net/burp"><b>Burp Suite</b></a> - tool for testing Web application security, intercepting proxy to replay, inject, scan and fuzz HTTP requests.<br>
- :small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_Zed_Attack_Proxy_Project"><b>OWASP Zed Attack Proxy</b></a> - intercepting proxy to replay, inject, scan and fuzz HTTP requests.<br>
- :small_orange_diamond: <a href="http://w3af.org/"><b>w3af</b></a> - is a Web Application Attack and Audit Framework.<br>
- :small_orange_diamond: <a href="https://mitmproxy.org/"><b>mitmproxy</b></a> - an interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.<br>
- :small_orange_diamond: <a href="https://cirt.net/Nikto2"><b>Nikto2</b></a> - web server scanner which performs comprehensive tests against web servers for multiple items.<br>
- :small_orange_diamond: <a href="http://sqlmap.org/"><b>sqlmap</b></a> - tool that automates the process of detecting and exploiting SQL injection flaws.<br>
- :small_orange_diamond: <a href="https://www.faradaysec.com/"><b>Faraday</b></a> - an Integrated Multiuser Pentest Environment.<br>
- :small_orange_diamond: <a href="https://github.com/zardus/ctf-tools"><b>ctf-tools</b></a> - some setup scripts for security research tools.<br>
- :small_orange_diamond: <a href="https://github.com/bl4de/security-tools"><b>security-tools</b></a> - collection of small security tools created mostly in Python. CTFs, pentests and so on.<br>
- :small_orange_diamond: <a href="https://github.com/fuzzdb-project/fuzzdb"><b>fuzzdb</b></a> - dictionary of attack patterns and primitives for black-box application fault injection and resource discovery.<br>
- :small_orange_diamond: <a href="https://github.com/google/syzkaller"><b>syzkaller</b></a> - is an unsupervised, coverage-guided kernel fuzzer.<br>
- :small_orange_diamond: <a href="https://github.com/longld/peda"><b>GDB PEDA</b></a> - Python Exploit Development Assistance for GDB.<br>
- :small_orange_diamond: <a href="https://www.hex-rays.com/products/ida/index.shtml"><b>IDA</b></a> - multi-processor disassembler and debugger useful for reverse engineering malware.<br>
- :small_orange_diamond: <a href="https://github.com/radare/radare2"><b>radare2</b></a> - framework for reverse-engineering and analyzing binaries.<br>
- :small_orange_diamond: <a href="https://github.com/salesforce/vulnreport"><b>Vulnreport</b></a> - open-source pentesting management and automation platform by Salesforce Product Security.<br>
- </p>
-
- ##### :black_small_square: Pentests bookmarks collection
-
- <p>
- :small_orange_diamond: <a href="http://www.pentest-standard.org/index.php/Main_Page"><b>PTES</b></a> - the penetration testing execution standard.<br>
- :small_orange_diamond: <a href="http://www.amanhardikar.com/mindmaps/Practice.html"><b>Pentests MindMap</b></a> - amazing mind map with vulnerable apps and systems.<br>
- :small_orange_diamond: <a href="http://www.amanhardikar.com/mindmaps/webapptest.html"><b>WebApps Security Tests MindMap</b></a> - incredible mind map for WebApps security tests.<br>
- :small_orange_diamond: <a href="https://brutelogic.com.br/blog/"><b>Brute XSS</b></a> - master the art of Cross Site Scripting.<br>
- :small_orange_diamond: <a href="https://jivoi.github.io/2015/07/03/offensive-security-bookmarks/"><b>Offensive Security Bookmarks</b></a> - security bookmarks collection, all that things I need to pass OSCP.<br>
- :small_orange_diamond: <a href="https://github.com/danielmiessler/SecLists"><b>SecLists</b></a> - collection of multiple types of lists used during security assessments, collected in one place.<br>
- :small_orange_diamond: <a href="https://github.com/coreb1t/awesome-pentest-cheat-sheets"><b>Awesome Pentest Cheat Sheets</b></a> - collection of the cheat sheets useful for pentesting.<br>
- :small_orange_diamond: <a href="https://github.com/Hack-with-Github/Awesome-Hacking"><b>Awesome Hacking by HackWithGithub</b></a> - awesome lists for hackers, pentesters and security researchers.<br>
- :small_orange_diamond: <a href="https://github.com/carpedm20/awesome-hacking"><b>Awesome Hacking by carpedm20</b></a> - a curated list of awesome hacking tutorials, tools and resources.<br>
- :small_orange_diamond: <a href="https://github.com/vitalysim/Awesome-Hacking-Resources"><b>Awesome Hacking Resources</b></a> - collection of hacking/penetration testing resources to make you better.<br>
- :small_orange_diamond: <a href="https://github.com/enaqx/awesome-pentest"><b>Awesome Pentest</b></a> - collection of awesome penetration testing resources, tools and other shiny things.<br>
- :small_orange_diamond: <a href="https://github.com/ksanchezcld/Hacking_Cheat_Sheet"><b>Hacking Cheat Sheet</b></a> - author hacking and pentesting notes.<br>
- :small_orange_diamond: <a href="https://github.com/The-Art-of-Hacking/h4cker"><b>Cyber Security Resources</b></a> - includes thousands of cybersecurity-related references and resources.<br>
- :small_orange_diamond: <a href="https://github.com/jhaddix/pentest-bookmarks"><b>Pentest Bookmarks</b></a> - there are a LOT of pentesting blogs.<br>
- :small_orange_diamond: <a href="https://github.com/swisskyrepo/PayloadsAllTheThings"><b>PayloadsAllTheThings</b></a> - a list of useful payloads and bypass for Web Application Security and Pentest/CTF.<br>
- :small_orange_diamond: <a href="https://github.com/foospidy/payloads"><b>payloads</b></a> - git all the Payloads! A collection of web attack payloads.<br>
- :small_orange_diamond: <a href="https://highon.coffee/blog/penetration-testing-tools-cheat-sheet/"><b>Pentesting Tools Cheat Sheet</b></a> - a quick reference high level overview for typical penetration testing engagements.<br>
- :small_orange_diamond: <a href="https://media.defcon.org/"><b>DEF CON Media Server</b></a> - great stuff from DEFCON.<br>
- :small_orange_diamond: <a href="https://github.com/rshipp/awesome-malware-analysis"><b>Awesome Malware Analysis</b></a> - a curated list of awesome malware analysis tools and resources.<br>
- :small_orange_diamond: <a href="https://www.netsparker.com/blog/web-security/sql-injection-cheat-sheet/"><b>SQL Injection Cheat Sheet</b></a> - detailed technical information about the many different variants of the SQL Injection.<br>
- :small_orange_diamond: <a href="http://kb.entersoft.co.in/"><b>Entersoft Knowledge Base</b></a> - great and detailed reference about vulnerabilities.<br>
- :small_orange_diamond: <a href="http://html5sec.org/"><b>HTML5 Security Cheatsheet</b></a> - a collection of HTML5 related XSS attack vectors.<br>
- :small_orange_diamond: <a href="http://evuln.com/tools/xss-encoder/"><b>XSS String Encoder</b></a> - for generating XSS code to check your input validation filters against XSS.<br>
- :small_orange_diamond: <a href="https://gtfobins.github.io/"><b>GTFOBins</b></a> - list of Unix binaries that can be exploited by an attacker to bypass local security restrictions.<br>
- :small_orange_diamond: <a href="https://guif.re/"><b>Guifre Ruiz Notes</b></a> - collection of security, system, network and pentest cheatsheets.<br>
- :small_orange_diamond: <a href="http://blog.safebuff.com/2016/07/03/SSRF-Tips/index.html"><b>SSRF Tips</b></a> - a collection of SSRF Tips.<br>
- :small_orange_diamond: <a href="http://shell-storm.org/repo/CTF/"><b>shell-storm repo CTF</b></a> - great archive of CTFs.<br>
- :small_orange_diamond: <a href="https://github.com/bl4de/ctf"><b>ctf</b></a> - CTF (Capture The Flag) writeups, code snippets, notes, scripts.<br>
- :small_orange_diamond: <a href="https://github.com/OWASP/owasp-mstg"><b>MSTG</b></a> - The Mobile Security Testing Guide (MSTG) is a comprehensive manual for mobile app security testing.<br>
- </p>
-
- ##### :black_small_square: Bounty programs
-
- <p>
- :small_orange_diamond: <a href="https://bountyfactory.io/"><b>Bounty Factory</b></a> - European bug bounty platform based on the legislation and rules in force in European countries.<br>
- :small_orange_diamond: <a href="https://www.openbugbounty.org/"><b>Openbugbounty</b></a> - allows any security researcher reporting a vulnerability on any website.<br>
- :small_orange_diamond: <a href="https://www.hackerone.com/"><b>hackerone</b></a> - global hacker community to surface the most relevant security issues.<br>
- :small_orange_diamond: <a href="https://www.bugcrowd.com/"><b>bugcrowd</b></a> - crowdsourced cybersecurity for the enterprise.<br>
- :small_orange_diamond: <a href="https://crowdshield.com/"><b>Crowdshield</b></a> - crowdsourced Security & Bug Bounty Management.<br>
- </p>
-
- ##### :black_small_square: Web Training Apps (local installation)
-
- <p>
- :small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_Vulnerable_Web_Applications_Directory_Project"><b>OWASP-VWAD</b></a> - comprehensive and well maintained registry of all known vulnerable web applications.<br>
- :small_orange_diamond: <a href="https://metasploit.help.rapid7.com/docs/metasploitable-2"><b>Metasploitable 2</b></a> - vulnerable web application amongst security researchers.<br>
- :small_orange_diamond: <a href="http://www.dvwa.co.uk/"><b>DVWA</b></a> - PHP/MySQL web application that is damn vulnerable.<br>
- :small_orange_diamond: <a href="https://sourceforge.net/projects/mutillidae/"><b>OWASP Mutillidae II</b></a> - free, open source, deliberately vulnerable web-application.<br>
- :small_orange_diamond: <a href="https://www.owasp.org/index.php/OWASP_Juice_Shop_Project"><b>OWASP Juice Shop Project</b></a> - the most bug-free vulnerable application in existence.<br>
- :small_orange_diamond: <a href="https://www.owasp.org/index.php/Category:OWASP_WebGoat_Project"><b>OWASP WebGoat Project</b></a> - insecure web application maintained by OWASP designed to teach web app security.<br>
- :small_orange_diamond: <a href="https://github.com/opendns/Security_Ninjas_AppSec_Training"><b>Security Ninjas</b></a> - open source application security training program.<br>
- :small_orange_diamond: <a href="https://github.com/rapid7/hackazon"><b>hackazon</b></a> - a modern vulnerable web app.<br>
- :small_orange_diamond: <a href="https://github.com/appsecco/dvna"><b>dvna</b></a> - damn vulnerable NodeJS application.<br>
- :small_orange_diamond: <a href="https://google-gruyere.appspot.com/"><b>Google Gruyere</b></a> - web application exploits and defenses.<br>
- :small_orange_diamond: <a href="https://github.com/amolnaik4/bodhi"><b>Bodhi</b></a> - is a playground focused on learning the exploitation of client-side web vulnerabilities.<br>
- </p>
-
- ##### :black_small_square: Labs (ethical hacking platforms/trainings/CTFs)
-
- <p>
- :small_orange_diamond: <a href="https://www.offensive-security.com/"><b>Offensive Security</b></a> - true performance-based penetration testing training for over a decade.<br>
- :small_orange_diamond: <a href="https://www.hackthebox.eu/"><b>Hack The Box</b></a> - online platform allowing you to test your penetration testing skills.<br>
- :small_orange_diamond: <a href="https://www.hacking-lab.com/index.html"><b>Hacking-Lab</b></a> - online ethical hacking, computer network and security challenge platform.<br>
- :small_orange_diamond: <a href="http://pwnable.kr/index.php"><b>pwnable.kr</b></a> - non-commercial wargame site which provides various pwn challenges regarding system exploitation.<br>
- :small_orange_diamond: <a href="https://pwnable.tw/"><b>Pwnable.tw</b></a> - is a wargame site for hackers to test and expand their binary exploiting skills.<br>
- :small_orange_diamond: <a href="https://picoctf.com/"><b>picoCTF</b></a> - is a free computer security game targeted at middle and high school students.<br>
- :small_orange_diamond: <a href="https://ctflearn.com/"><b>CTFlearn</b></a> - is an online platform built to help ethical hackers learn and practice their cybersecurity knowledge and skills.<br>
- :small_orange_diamond: <a href="https://silesiasecuritylab.com/"><b>Silesia Security Lab</b></a> - high quality security testing services.<br>
- :small_orange_diamond: <a href="https://practicalpentestlabs.com/"><b>Practical Pentest Labs</b></a> - pentest lab, take your Hacking skills to the next level.<br>
- :small_orange_diamond: <a href="https://www.root-me.org/?lang=en"><b>Root Me</b></a> - the fast, easy, and affordable way to train your hacking skills.<br>
- :small_orange_diamond: <a href="https://rozwal.to/login"><b>rozwal.to</b></a> - a great platform to train your pentesting skills.<br>
- :small_orange_diamond: <a href="https://tryhackme.com/"><b>TryHackMe</b></a> - learning Cyber Security made easy.<br>
- :small_orange_diamond: <a href="https://hackxor.net/"><b>hackxor</b></a> - is a realistic web application hacking game, designed to help players of all abilities develop their skills.<br>
- :small_orange_diamond: <a href="http://overthewire.org/wargames/"><b>OverTheWire</b></a> - can help you to learn and practice security concepts in the form of fun-filled games.<br>
- :small_orange_diamond: <a href="https://labs.wizard-security.net/"><b>Wizard Labs</b></a> - is an online Penetration Testing Lab.<br>
- :small_orange_diamond: <a href="https://pentesterlab.com/"><b>PentesterLab</b></a> - provides vulnerable systems that can be used to test and understand vulnerabilities.<br>
- :small_orange_diamond: <a href="https://ringzer0ctf.com/"><b>RingZer0</b></a> - tons of challenges designed to test and improve your hacking skills.<br>
- :small_orange_diamond: <a href="https://www.ubeeri.com/preconfig-labs"><b>Ubeeri</b></a> - preconfigured lab environments.<br>
- :small_orange_diamond: <a href="https://lab.pentestit.ru/"><b>Pentestit</b></a> - emulate IT infrastructures of real companies for legal pen testing and improving penetration testing skills.<br>
- :small_orange_diamond: <a href="https://microcorruption.com/"><b>Microcorruption</b></a> - reversal challenges done in the web interface.<br>
- :small_orange_diamond: <a href="https://crackmes.one/"><b>Crackmes</b></a> - download crackmes to help improve your reverse engineering skills.<br>
- </p>
-
- ##### :black_small_square: Other resources
-
- <p>
- :small_orange_diamond: <a href="https://github.com/bugcrowd/bugcrowd_university"><b>Bugcrowd University</b></a> - open source education content for the researcher community.<br>
- :small_orange_diamond: <a href="https://github.com/rewardone/OSCPRepo"><b>OSCPRepo</b></a> - a list of resources and scripts that I have been gathering in preparation for the OSCP.<br>
- :small_orange_diamond: <a href="https://medium.com/@cxosmo/owasp-top-10-real-world-examples-part-1-a540c4ea2df5"><b>OWASP Top 10: Real-World Examples</b></a> - test your web apps with real-world examples (two-part series).<br>
- </p>
-
- #### Your daily knowledge and news [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### :black_small_square: RSS Readers
-
- <p>
- :small_orange_diamond: <a href="https://feedly.com/"><b>Feedly</b></a> - organize, read and share what matters to you.<br>
- </p>
-
- ##### :black_small_square: Security
-
- <p>
- :small_orange_diamond: <a href="https://securitynewsletter.co/"><b>Security Newsletter</b></a> - security news as a weekly digest (email notifications).<br>
- :small_orange_diamond: <a href="https://security.googleblog.com/"><b>Google Online Security Blog</b></a> - the latest news and insights from Google on security and safety on the Internet.<br>
- :small_orange_diamond: <a href="https://blog.qualys.com/"><b>Qualys Blog</b></a> - expert network security guidance and news.<br>
- :small_orange_diamond: <a href="https://www.darkreading.com/"><b>DARKReading</b></a> - connecting the Information Security Community.<br>
- :small_orange_diamond: <a href="https://twitter.com/disclosedh1"><b>publiclyDisclosed</b></a> - public disclosure watcher who keeps you up to date about the recently disclosed bugs.<br>
- :small_orange_diamond: <a href="https://packetstormsecurity.com/"><b>Packet Storm</b></a> - information security services, news, files, tools, exploits, advisories and whitepapers.<br>
- :small_orange_diamond: <a href="https://sekurak.pl/"><b>Sekurak</b></a> - about security, penetration tests, vulnerabilities and many others (PL/EN).<br>
- :small_orange_diamond: <a href="https://nfsec.pl/"><b>nf.sec</b></a> - basic aspects and mechanisms of Linux operating system security (PL).<br>
- </p>
-
- #### Other Cheat Sheets [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ###### Build your own DNS Servers
-
- <p>
- :small_orange_diamond: <a href="https://calomel.org/unbound_dns.html"><b>Unbound DNS Tutorial</b></a> - a validating, recursive, and caching DNS server.<br>
- :small_orange_diamond: <a href="https://www.ctrl.blog/entry/knot-dns-resolver-tutorial"><b>Knot Resolver on Fedora</b></a> - how to get faster and more secure DNS resolution with Knot Resolver on Fedora.<br>
- :small_orange_diamond: <a href="https://www.aaflalo.me/2018/10/tutorial-setup-dns-over-https-server/"><b>DNS-over-HTTPS</b></a> - tutorial to setup your own DNS-over-HTTPS (DoH) server.<br>
- :small_orange_diamond: <a href="https://zwischenzugs.com/2018/01/26/how-and-why-i-run-my-own-dns-servers/"><b>DNS Servers</b></a> - how (and why) i run my own DNS Servers.<br>
- </p>
-
- ###### Build your own Certificate Authority
-
- <p>
- :small_orange_diamond: <a href="https://jamielinux.com/docs/openssl-certificate-authority/"><b>OpenSSL Certificate Authority</b></a> - build your own certificate authority (CA) using the OpenSSL command-line tools.<br>
- </p>
-
- ###### Build your own System/Virtual Machine
-
- <p>
- :small_orange_diamond: <a href="https://github.com/cfenollosa/os-tutorial"><b>os-tutorial</b></a> - how to create an OS from scratch.<br>
- :small_orange_diamond: <a href="https://justinmeiners.github.io/lc3-vm/"><b>Write your Own Virtual Machine</b></a> - how to write your own virtual machine (VM).<br>
- </p>
-
- ###### DNS Servers list (privacy)
-
- | <b><u>IP</u></b> | <b><u>URL</u></b> |
- | :--- | :--- |
- | **`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://www.cloudflare.com/dns/), [1.1.1.1](https://1.1.1.1/) |
- | **`94.130.110.185`** | [dnsprivacy.at](https://dnsprivacy.at/) |
-
- ###### TOP Browser extensions
-
- | <b><u>Extension name</u></b> | <b><u>Description</u></b> |
- | :--- | :--- |
- | **`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
-
- | <b><u>Extension name</u></b> | <b><u>Description</u></b> |
- | :--- | :--- |
- | **`Autorize`** | Automatically detects authorization enforcement. |
- | **`Reflection`** | An efficient blocker: easy on memory and CPU footprint. |
- | **`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. |
- | **`Active Scan++`** | Extends Burp's active and passive scanning capabilities. |
- | **`HTML5 Auditor`** | Scans for usage of risky HTML5 features. |
- | **`Software Vulnerability Scanner`** | Software vulnerability scanner based on Vulners.com audit API. |
-
- #### One-liners [<sup>[TOC]</sup>](#anger-table-of-contents)
-
- ##### Table of Contents
-
- - **[System](#system)**
- * [terminal](#tool-terminal)
- * [mount](#tool-mount)
- * [fuser](#tool-fuser)
- * [ps](#tool-ps)
- * [top](#tool-top)
- * [strace](#tool-strace)
- * [kill](#tool-kill)
- * [find](#tool-find)
- * [diff](#tool-diff)
- * [tail](#tool-tail)
- * [cpulimit](#tool-cpulimit)
- * [pwdx](#tool-pwdx)
- * [tr](#tool-tr)
- * [chmod](#tool-chmod)
- * [who](#tool-who)
- * [last](#tool-last)
- * [screen](#tool-screen)
- * [du](#tool-du)
- * [inotifywait](#tool-inotifywait)
- * [openssl](#tool-openssl)
- * [gnutls-cli](#tool-gnutls-cli)
- * [secure-delete](#tool-secure-delete)
- * [dd](#tool-dd)
- - **[HTTP/HTTPS](#http-https)**
- * [curl](#tool-curl)
- * [httpie](#tool-httpie)
- - **[Network](#network)**
- * [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)
- * [lsof](#tool-lsof)
- * [netstat](#tool-netstat)
- * [rsync](#tool-rsync)
- * [host](#tool-host)
- * [dig](#tool-dig)
- * [network-other](#tool-network-other)
- - **[Programming](#programming)**
- * [awk](#tool-awk)
- * [sed](#tool-sed)
- * [grep](#tool-grep)
-
- <a name="system"><b>System</b></a>
-
- ##### 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[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | \
- grep -v "./" | \
- column -c3 -s " " -t | \
- sort -nr | nl | head -n 20
- ```
-
- ###### Quickly backup a file
-
- ```bash
- cp filename{,.orig}
- ```
-
- ###### Empty a file (truncate to 0 size)
-
- ```bash
- >filename
- ```
-
- ###### Delete all files in a folder that don't match a certain file extension
-
- ```bash
- rm !(*.foo|*.bar|*.baz)
- ```
-
- ###### Pass multi-line string to a file
-
- ```bash
- # cat >filename ... - overwrite file
- # cat >>filename ... - append to file
- cat > filename << __EOF__
- data data data
- __EOF__
- ```
-
- ###### Edit a file on a remote host using vim
-
- ```bash
- vim scp://user@host//etc/fstab
- ```
-
- ###### Create a directory and change into it at the same time
-
- ```bash
- mkd() { mkdir -p "$@" && 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
- ```
-
- ___
-
- ##### 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))
-
- ###### Kills a process that is locking a file
-
- ```bash
- fuser -k filename
- ```
-
- ###### Show what PID is listening on specific port
-
- ```bash
- fuser -v 53/udp
- ```
-
- ___
-
- ##### 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
- ```
-
- ___
-
- ##### 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
-
- ```bash
- find . -user <username> -print
- ```
-
- ###### Find files and directories for all without specific user
-
- ```bash
- find . \!-user <username> -print
- ```
-
- ###### 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 </path/to/dir> -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
- ```
-
- ___
-
- ##### 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 , <str>)
- ```
-
- * `<str>` - process containing str (eg. nginx, worker)
-
- ___
-
- ##### Tool: [strace](https://en.wikipedia.org/wiki/Strace)
-
- ###### Track child process
-
- ```bash
- strace -f -p $(pidof glusterfsd)
- ```
-
- ###### Track process after 30 seconds
-
- ```bash
- timeout 30 strace $(< /var/run/zabbix/zabbix_agentd.pid)
- ```
-
- ###### Track child process and redirect output to a file
-
- ```bash
- ps auxw | grep 'sbin/[a]pache' | awk '{print " -p " $2}' | xargs strace -o /tmp/strace-apache-proc.out
- ```
-
- ###### 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 :<port> | awk '{l=$2} END {print l}')
- ```
-
- ___
-
- ##### Tool: [diff](https://en.wikipedia.org/wiki/Diff)
-
- ###### Compare two directory trees
-
- ```bash
- diff <(cd directory1 && find | sort) <(cd directory2 && find | sort)
- ```
-
- ___
-
- ##### Tool: [tail](https://en.wikipedia.org/wiki/Tail_(Unix))
-
- ###### Annotate tail -f with timestamps
-
- ```bash
- tail -f file | while read ; do echo "$(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$(date +%d%m%Y%s).lzo
- ```
-
- ___
-
- ##### Tool: [cpulimit](http://cpulimit.sourceforge.net/)
-
- ###### Limit the cpu usage of a process
-
- ```bash
- cpulimit -p pid -l 50
- ```
-
- ___
-
- ##### Tool: [pwdx](https://www.cyberciti.biz/faq/unix-linux-pwdx-command-examples-usage-syntax/)
-
- ###### Show current working directory of a process
-
- ```bash
- pwdx <pid>
- ```
-
- ___
-
- ##### Tool: [taskset](https://www.cyberciti.biz/faq/taskset-cpu-affinity-command/)
-
- ###### Start a command on only one CPU core
-
- ```bash
- taskset -c 0 <command>
- ```
-
- ___
-
- ##### Tool: [tr](https://en.wikipedia.org/wiki/Tr_(Unix))
-
- ###### Show directories in the PATH, one per line
-
- ```bash
- tr : '\n' <<<$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 [<command>]
- ```
-
- ___
-
- ##### 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 remote host
-
- ```bash
- echo | openssl s_client -connect google.com:443 -showcerts
- ```
-
- ###### Testing connection to remote host (with SNI support)
-
- ```bash
- echo | openssl s_client -showcerts -servername google.com -connect google.com:443
- ```
-
- ###### Testing connection to remote host with specific ssl version
-
- ```bash
- openssl s_client -tls1_2 -connect google.com:443
- ```
-
- ###### Testing connection to remote host with specific ssl cipher
-
- ```bash
- openssl s_client -cipher 'AES128-SHA' -connect google.com:443
- ```
-
- ###### Generate private key
-
- ```bash
- # _len: 2048, 4096
- ( _fd="private.key" ; _len="4096" ; \
- openssl genrsa -out ${_fd} ${_len} )
- ```
-
- ###### Generate private key with password
-
- ```bash
- # _ciph: des3, aes128, aes256
- # _len: 2048, 4096
- ( _ciph="aes128" ; _fd="private.key" ; _len="4096" ; \
- openssl genrsa -${_ciph} -out ${_fd} ${_len} )
- ```
-
- ###### Remove password from private key
-
- ```bash
- ( _fd="private.key" ; _fd_unp="private_unp.key" ; \
- openssl rsa -in ${_fd} -out ${_fd_unp} )
- ```
-
- ###### 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 + csr
-
- ```bash
- ( _fd="private.key" ; _fd_csr="request.csr" ; _len="4096" ; \
- 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 exist 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
- prompt = no
- default_md = sha256
- req_extensions = req_ext
- distinguished_name = dn
-
- [ dn ]
- C=<two-letter ISO abbreviation for your country>
- ST=<state or province where your organization is legally located>
- L=<city where your organization is legally located>
- O=<legal name of your organization>
- OU=<section of the organization>
- CN=<fully qualified domain name>
-
- [ req_ext ]
- subjectAltName = @alt_names
-
- [ alt_names ]
- DNS.1 = <fully qualified domain name>
- DNS.2 = <next domain>
- DNS.3 = <next domain>
- EOF
- ))
- ```
-
- ###### 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} )
- ```
-
- ###### Checking whether the private key and the certificate match
-
- ```bash
- (openssl rsa -noout -modulus -in private.key | openssl md5 ; openssl x509 -noout -modulus -in certificate.crt | openssl md5) | uniq
- ```
-
- ___
-
- ##### 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: [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 <dd_params> status=progress
- watch --interval 5 killall -USR1 dd
- ```
-
- ###### Redirect output to a file with dd
-
- ```bash
- echo "string" | dd of=filename
- ```
-
- <a name="http-https"><b>HTTP/HTTPS</b></a>
-
- ##### 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
-
- ###### 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 --follow --max-redirects 5 --verify no https://www.google.com
- ```
-
- * `-F, --follow` - follow redirects
- * `--max-redirects N` - maximum for `--follow`
- * `--verify no` - skip SSL verification
-
- ```bash
- http -p Hh --follow --max-redirects 5 --verify no --proxy http:http://127.0.0.1:16379 https://www.google.com
- ```
-
- * `--proxy [http:]` - set proxy server
-
- <a name="network"><b>Network</b></a>
-
- ##### Tool: [ssh](https://www.openssh.com/)
-
- ###### 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 $(<cmd.txt)
- ```
-
- ###### Get public key from private key
-
- ```bash
- ssh-keygen -y -f ~/.ssh/id_rsa
- ```
-
- ###### Get all fingerprints
-
- ```bash
- ssh-keygen -l -f .ssh/known_hosts
- ```
-
- ###### Ssh authentication with user password
-
- ```bash
- ssh -o PreferredAuthentications=password -o PubkeyAuthentication=no user@remote_host
- ```
-
- ###### Ssh authentication with publickey
-
- ```bash
- ssh -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes -i id_rsa user@remote_host
- ```
-
- ###### Simple recording SSH session
-
- ```bash
- function _ssh_sesslog() {
-
- _sesdir="<path/to/session/logs>"
-
- mkdir -p "${_sesdir}" && \
- ssh $@ 2>&1 | tee -a "${_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/<proto>/<host>/<port>" >/dev/null 2>&1 ; echo $?
- ```
-
- * `<proto` - set protocol (tcp/udp)
- * `<host>` - set remote host
- * `<port>` - set destination port
-
- ###### Read and write to TCP or UDP sockets with common bash tools
-
- ```bash
- exec 5<>/dev/tcp/<host>/<port>; cat <&5 & cat >&5; exec 5>&-
- ```
-
- ___
-
- ##### Tool: [tcpdump](http://www.tcpdump.org/)
-
- ###### Filter incoming (on interface) traffic (specific <ip:port>)
-
- ```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 <ip:port>) 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 <num>` - pcap will be created every `<num>` seconds
- * `-C <size>` - close the current pcap and open a new one if is larger than `<size>`
-
- ###### 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
- ```
-
- ___
-
- ##### 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.google.com" port 443
- ```
-
- * `-d [iface|any]` - set interface
- * `[domain]` - set hostname
- * `port [1-65535]` - set port number
-
- ```bash
- ngrep -d eth0 "www.google.com" (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.google.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 <scan_type> www.google.com
- ```
-
- * `-V|--verbose` - verbose mode
- * `-p|--destport` - set destination port
- * `-s|--baseport` - set source port
- * `<scan_type>` - 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 <remote_host>
- ```
-
- * `--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,http-waf-detect.aggro,http-waf-detect.detectBodyChanges,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
- server> nc -l 5000 -e /bin/bash
- 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__
- <!doctype html>
- <head>
- <meta charset="utf-8">
- <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
- <title></title>
- <meta name="description" content="">
- <meta name="viewport" content="width=device-width, initial-scale=1">
- </head>
- <body>
-
- <p>
-
- Hello! It's a site.
-
- </p>
-
- </body>
- </html>
- __EOF__
- ```
-
- ```bash
- server> while : ; do \
- (echo -ne "HTTP/1.1 200 OK\r\nContent-Length: $(wc -c <index.html)\r\n\r\n" ; cat index.html;) | \
- nc -l -p 5000 \
- ; done
- ```
-
- * `-p` - port number
-
- ###### Simple HTTP Proxy (single connection)
-
- ```bash
- #!/usr/bin/env bash
-
- if [[ $# != 2 ]] ; then
- printf "%s\\n" \
- "usage: ./nc-proxy listen-port bk_host:bk_port"
- fi
-
- _listen_port="$1"
- _bk_host=$(echo "$2" | cut -d ":" -f1)
- _bk_port=$(echo "$2" | cut -d ":" -f2)
-
- printf " lport: %s\\nbk_host: %s\\nbk_port: %s\\n\\n" \
- "$_listen_port" "$_bk_host" "$_bk_port"
-
- _tmp=$(mktemp -d)
- _back="$_tmp/pipe.back"
- _sent="$_tmp/pipe.sent"
- _recv="$_tmp/pipe.recv"
-
- trap 'rm -rf "$_tmp"' EXIT
-
- mkfifo -m 0600 "$_back" "$_sent" "$_recv"
-
- sed "s/^/=> /" <"$_sent" &
- sed "s/^/<= /" <"$_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: [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:<params>` - 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:<params>` - 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:<params>` - communicates with the specified peer socket
- * `filename` - define socket
-
- ___
-
- ##### 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
- ```
-
- ___
-
- ##### Tool: [netstat](https://en.wikipedia.org/wiki/Netstat)
-
- ###### Graph # of connections for each hosts
-
- ```bash
- netstat -an | \
- grep ESTABLISHED | \
- awk '{print $5}' | \
- awk -F: '{print $1}' | \
- grep -v -e '^[[:space:]]*$' | \
- 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"
- ```
-
- ___
-
- ##### 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: [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 .
- ```
-
- <a name="programming"><b>Programming</b></a>
-
- ##### 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()
- ```
-
- ##### Tool: [awk](http://www.grymoire.com/Unix/Awk.html)
-
- ###### Remove duplicate entries in a file without sorting
-
- ```bash
- awk '!x[$0]++' filename
- ```
-
- ###### Exclude multiple columns using AWK
-
- ```bash
- awk '{$1=$3=""}1' filename
- ```
-
- ###### Get the last hour of Apache logs
-
- ```bash
- awk '/'$(date -d "1 hours ago" "+%d\\/%b\\/%Y:%H:%M")'/,/'$(date "+%d\\/%b\\/%Y:%H:%M")'/ { print $0 }' /var/log/httpd/access_log
- ```
-
- ___
-
- ##### Tool: [sed](http://www.grymoire.com/Unix/Sed.html)
-
- ###### To print a specific line from a file
-
- ```bash
- sed -n 10p /path/to/file
- ```
-
- ###### Remove a specific line from a file
-
- ```bash
- sed -i 10d /path/to/file
- # alternative (BSD): sed -i'' 10d /path/to/file
- ```
-
- ###### Remove a range of lines from a file
-
- ```bash
- sed -i <file> -re '<start>,<end>d'
- ```
-
- ___
-
- ##### Tool: [grep](http://www.grymoire.com/Unix/Grep.html)
-
- ###### Search for a "pattern" inside all files in the current directory
-
- ```bash
- grep -rn "pattern"
- grep -RnisI "pattern" *
- fgrep "pattern" * -R
- ```
-
- ###### Remove blank lines from a file and save output to new file
-
- ```bash
- grep . filename > newfilename
- ```
-
- ###### Except multiple patterns
-
- ```bash
- grep -vE '(error|critical|warning)' filename
- ```
-
- ###### Show data from file without comments
-
- ```bash
- grep -v ^[[:space:]]*# filename
- ```
-
- ###### Show data from file without comments and new lines
-
- ```bash
- egrep -v '#|^$' filename
- ```
|
