Fwbuilder is a unique graphical firewall tool that allows the user to create objects and then drag and drop those objects into firewalls, to build a powerful security system for a single PC or a network of PCs. Fwbuilder supports a wide range of firewalls (Cisco ASA/PIX, Linux iptables, FreeBSD's ipfilter, OpenBSD's pf, and more), so its rules can be deployed on multiple platforms.
Let's take a look at using Fwbuilder on Linux, which might just become a life-long affair with a powerful security system.

Installation of Fwbuilder is as simple as searching for "fwbuilder" (no quotes) in your Add/Remove Software tool (such as Package-Kit, Synaptic, etc) and marking Fwbuilder for installation. However, if you're installing Fwbuilder on Ubuntu, the package that will install is out of date and will not work. In order to get a working, updated Fwbuilder installed on Ubuntu, follow these steps (You will either have to su to the root user or use sudo for this to work):

The link for this article located at Linux.com is no longer available.