The 2100 CF is a dedicated content filtering appliance. It has three Fast Ethernet ports – two sit transparently inline with your internet, the third is a dedicated management port.
Fortinet's FortiGate-800 is the company's mid-range firewall. It uses FortiOS 3.0 (this is a correction from the incorrect v2.5 printed in the original article) and comes with antivirus and intrusion prevention as standard, both regularly updated.
St. Bernard's iPrism 1200 is a 1U rack-mountable appliance. With clearly labelled network ports, it is very simple to connect to the network. St. Bernard also sells the iPrism 3000, which is aimed at larger organizations, with Gigabit Ethernet.