The SPIRO-Linux EZ-Way Firewall allows you to setup and maintain a firewall easily, and without much strain on resources. It can be set up on a 486 with 8MB RAM, although a much more robust system is recommended for larger networks. This is meant to be a drop in replacement for the expensive and restrictive Firewall products available on the commercial market today.
8d6d1966bba150a3e05cf9d920d1e66b8925c4f538115995f91ff8983dc5898f