Archive for the ‘Networking’ Category
I needed to setup a content filtering firewall a few weeks ago for an office of about 50 people. The existing firewall was a Sonicwall Pro 4060 which is a very solid firewall and is more than adequate for 50 computers. Sonicwall also has a content filter application that installs on the Pro 4060. The drawback to using Sonicwall’s filter is the price. Their filter is billed on a recurring yearly subscription, and would cost about $2,000 per year to use. $2,000 per year was far beyond the budget for such a project, so I went to look for an open source or lower cost setup, hopefully without any annual fee. My first thought was a custom Linux-Debian computer made only to function as a firewall. After some research and a few recommendations, I found a great out-of-the-box Linux operating system, Untangle, that is designed specifically for dedicated firewall applications. This was a much better solution that custom configuring a Linux server.
The following is a quick guide on how to setup a Enterprise class firewall for a small to medium sized business. How good your firewall performs is dependent on the hardware that you use, but if you copied the specs of the one that I setup, it should easily handle 100+ computers and servers.