My college roommates and I used to run m0n0wall (which pfSense was forked from) on a Pentium 3, running from a 400MB hard drive from a stack of very old compute

My college roommates and I used to run m0n0wall (which pfSense was forked from) on a Pentium 3, running from a 400MB hard drive from a stack of very old computers in my parents' garage. I turned it on, assigned the network interfaces, and left it alone for about 9 months at a time. Security wasn't really the point. One device per student was allowed on the dorm network. We had three computer science students living in that room, so obviously that wouldn't fly for long.