Firestarter is not installed by default when Ubuntu Linux is first installed. The first step in using Firestarter, therefore, is to install it.
To install from the command line, begin by opening a terminal window by selecting the Applications menu and selecting Terminal from the Accessories menu. In the terminal window enter the following command and press enter to execute it:
sudo apt-get install firestarter
Enter your password when prompted to do so and wait while Firestarter is downloaded and installed.
Firestarter will now be listed in the System->Administration desktop menu. To launch Firestarter select this menu option. The first time Firestarter is run it will ask a number of questions about your network environment.