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.
Unique in this test, the iPrism is actually an appliance. Although these tend to be more expensive than software-only products, they usually have the advantage of a fairly solid configuration since they are factory-build.