Setup a Software Firewall in Linux using Firestarter

From Techthrob.com: One of the great features included in Linux is the IPtables firewall. Unfortunately, its command-line use is rather complex, and it can be intimidating for even experienced Linux users to configure it. Firestarter is a friendly graphical interface that allows you to configure a software firewall in Linux using the built-in IPtables/IPchains utilities. Read More at Techthrob.com