All the Best Linux Cheat Sheets. Linux Security Quick Reference Guide - An awesome security checklist reference IP Tables - If you are interested in Linux firewalls this is a must have TCPDump - Great cheat sheet to an awesome security tool Wireshark Filters - An awesome list of filters for the best packet sniffing utility IP Access Lists - Cheat sheet for IP Access Lists Common Ports - In case you don’t have all common ports memorized netcat - Reference to the swiss army knife of networking.
Pentoo. Basic Iptables - Debian/RedHat. Summary You can find an easier to read version here: 5dollarwhitebox.org Alot of people are freaked out by IPTables and find it hard to understand.
However, once you get the grasp of it the basics are easy. This document will serve as a basic how-to on using iptables. Lignes de défense.