From:
Linux.com :: Installing a firewall on Ubuntu
gnome-lokkit
OR guarddog (trying guarddog) gksudo guarddog
gnome-lokkit — this is a wizard that asks you a few questions and blocks ports — does not even show you your current settings
lokkit — does not give an option for samba (so no windows file shares) — I also had an issue with DNS being blocked when I changed networks 🙁
guarddog is advanced but looks like a pain for personal use
