Install a graphical firewall client on Ubuntu 9.10
(ServerLinux) Although Ubuntu 9.10 (aka Karmic Koala) ships with a command line firewall script - ufw (Uncomplicated FireWall) - for configuring IPTables (netfilter), the firewall application built into the Linux kernel, it does not come with a graphical firewall
Articles from: Linux Server Security Secrets (ServerLinux)