N100 wold run in BSD in x86 compatibility mode, but I don’t run BSD because its generally about 9 months behind keeping up with Linux.
That is one of the reasons why I picked IPFire because it runs a Linux core.
The difference between running a gateway server, which what I call using a server as a router, and a store bought router is you get better functionality with VPN, Intrusion Protection and better throughput on the firewall side with a server.
But since I’m more of a traditionalist, I use a gateway server motherboard. I put together one at a reasonable price. Granted, my X10 server pulls more power than a modern server motherboard. But It only cost me $60 for the board and another $50 for processor compared $700 new server board + processor. Supermicro X10SLH-N6-ST031 router boards builds