IPFilter resources
IP Filter is a great little firewall package. It does just about everything other free firewalls (ipfwadm, ipchains, ipfw) do, but it's also portable and does neat stuff the others don't.
Discover How To Secure My Firewall HOWTOs
How to Set Up a Linux-Based Firewall for a SOHO: part 1 of a 3-part series
This documentation will show you how to set up a Linux-based personal firewall for the SOHO (small office, home office), broadband-attached network. It also takes a look at several SOHO firewalls and determines whether or not they can keep your syste
Shoreline Firewall
The Shoreline Firewall (Shorewall) is an iptables based firewall that can be used on a dedicated firewall system, a multi-function masquerade gateway/server or on a standalone Linux system.
