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, DSL, Cable, or LAN setup. It is
restrictive to outside attacks while still being
as transparent as possible to those inside.