Born as a fork of SmoothWall Linux, IPCop is a distro that intends to offer the home and small office user a really easy-to-use firewall, managed from a simple web interface.
No evil packets will go beyond this point.
The application comes along with just enough applications to work as a firewall, without showboating in terms of its features that can be improved by installing different add-ons that allow us to block traffic, filter URLs or add a more advanced proxy.
How IPCop works
As you've probably gathered from its name, it's basically an IP policeman that determines which data packets can go through and which ones can't, discarding those that seem suspicious and protecting the user against any kind of intrusion.
IPCop basically divides the different areas into color zones: a red one for the Internet zone, a green one for wired LAN, a blue one for the wireless zone and an orange one for the DMZ, establishing a series of protocols and settings that regulate the communications between all four interface.