Information:
PMFirewall is an Ipchains Firewall and Masquerading Configuration Utility for Linux. It is designed to allow a beginner to build a custom firewall with little or no ipchains experience.
This firewall should work for most Workstations, Servers and Dual NIC routers using either a dialup or LAN setup.
It is restrictive to outside attacks while still as transparent as possible to those inside.