server firewall ubuntu

How to install and configure a graphical firewall client in Ubuntu 10.10
LinuxBSDos: "In Ubuntu, the firewall's original command line interface has been replaced by ufw, a more user-friendly command line script. Ufw, the Uncomplicated FireWall, has a graphical interface that is also a lot simpler to use than other graphical firewall interfaces in Linux."
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Basic Squid Proxy Server Tutorial Part 3 of 3
