IPCop is one of the most full-featured SOHO firewalls on the market and by now you should be familiar with most of the features, but you may have noticed some shortfalls. There may be areas where IPCop doesn't perform a function in exactly the right way or doesn't have a specific function we require. So what can we do? We can customize IPCop with some essential addons.
At its core IPCop is a collection of Linux-based tools held together with impressive script-based glue. So it's not surprising that we can modify, extend, and improve the system to suit our needs. This is where the community part of open-source software becomes important as we find that users of the system have developed a variety of addons that can be installed and used on IPCop.
Addons are generally developed by third parties, i.e. people other than the IPCop developers. They are usually developed in order to fill some gap that a user found with the software, and then released so that other...