Firewall Building

Building a firewall on a Linux system with a 2.6 series kernel involves the Netfilter iptables command. The 2.4 series kernel uses the ipchains command. The configuration of a Linux system’s firewall is often held in a script that is run at system boot. Crafting complex firewall script can take a long time, however there are some software projects to help make creating and managing your Linux firewalls easier.

• http://www.fwbuilder.org
• http://www.hideaway.net/iptables/ (seems to be aimed at RedHat)
• http://www.simonzone.com/software/guarddog/ (KDE)
• http://firehol.sourceforge.net/ (more than just a script-builder)