Speaking as a pfSense user, it isn't hard to build a rack mountable router. I used an Intel Rangeley C2758 and put it and a power supply, and a pair of SSDs to

Speaking as a pfSense user, it isn't hard to build a rack mountable router. I used an Intel Rangeley C2758 and put it and a power supply, and a pair of SSDs to mirror the install in a 2U chassis. Nothing would have stopped me using a 1U chassis, but I have no experience with smaller power supplies yet.