Firestarter is an easy to use firewall for Ubuntu that includes a GUI administration tool. Installation of this firewall is as easy as using it. In this HowTo we will cover how to install the firewall. Open a terminal window, and type in the following command: sudo apt-get install firestarter After the installation is finished, you can find the administration GUI at System \ Administration \ Firestarter: When you launch the GUI for the first time, it will take you through a setup wizard: Click forward, and you will be able to select the network device. If you are using DHCP for your machine, make sure you select that checkbox here: Click Forward, and then Forward again. You will see the final screen of the wizard: Click the save button and you will see the normal GUI screen: This GUI is accessible from the tray icon, shown here: The firewall is now installed. The firewall will continue running whether or not you are running the GUI, but the G...