A simple Linux firewall
This document discusses how to set up a very simple firewall for Linux, to greatly increase the security of your box against outside attacks.
Discover How To Secure My Firewall HOWTOs
IP Filter
This is a programmers guide to IP Filter. Describes stateful properties, design issues, and brief examples.
Protecting Your Linux System with FireStarter and Storm Firewall-Using a GUI to Configure a System
This documentation takes a look at two GUI-based firewalling solutions for Linux: one a commercial offering from Stormix Technologies (Storm Firewall), and the other a free software project that integrates with the GNOME desktop (Firestarter).
