Easy firewall setup for Ubuntu.
This is the easy way to setup a firewall in linux, in case you afraid someone might hack into your computer. Well, unlike Mac OS X 10.5.2 which were hacked in 2 minute flat, ubuntu distribution are pretty secure out o the box. And if you wanna secure it more, just apply this firewall installation.
Well, after installing, open it in Application > Internet > Firestarter. It got a nice GUI. And you can customize the connection that you desire.
sudo apt-get install firestarter