LinuxDevCenter.com: Feather Linux for Firewalls: “Feather Linux makes it easy to create and configure a firewall. When would you do this? Consider setting up an ad hoc network for a LAN party or a trade show, where you want a good connection to the internet but don’t want to expose everything on the local network to the world at large. Having a customizable, bootable LiveCD makes it easy to turn any single machine into the firewall.”

-m