Firestarter is an Open Source firewall program that has an easy to use graphical interface. It is available in an RPM package for Fedora, Red Hat, SuSE, and Mandrake Linux distributions. For ubuntu and debian based distributions, it can be installed using the apt-get tool (Type apt-get install firestarter in the Terminal window). Ubuntu users need to have the “universe” repository enabled. Gentoo users can use the Portage system to install. There is a set-up wizard the first time you run Firestarter that allows you to select your firewall preferences.