Sedwards 

Guarddog is an easy to use, yet powerful, firewall for Linux machines running KDE 2 or 3. Guarddog isn't just a pretty GUI face thrown over the standard command-line firewalling utilities, it allows you to quickly and easily specify your firewall policy at a high-level, and then takes care of the rest. The first release candidate, version 1.9.15, is out and now needs heavy user testing. Everyone is encouraged to test it on as many weird and wonderful network setups as possible and report their experiences before the final official 2.0 release. The full announcement follows. Read More