Notes for my own little network...

I found a few interesting things while looking for a cheap and easy firewall/routing solution.

Coyote Linux Floppy Firewall - A single floppy distribution of Linux that is designed for the sole purpose of sharing an Internet connection.

PORTKNOCKING - A system for stealthy authentication across closed ports.

Router Design Project - Information on building a low cost router.

Floppix - A very small distribution of Debian/GNU Linux that fits on two 3.5" 1.4Mb diskettes. It provides a platform to practice linux commands and experiment with simple system administration. Floppix has no hard drive support; you cannot access, modify, damage or destroy anything installed on the hard drive. For this reason, Floppix works safely in the lab, at home or at work.