I used Free sense for a long time. I even wrote some of the documentation for the project. Now its forked into Open sense but I have only played with it in a lab format. That's probably what I would go with if I was building a from-scratch setup today. Archive: https://archive.today/2xk9W From the post: >>Although we have many types of networking equipment with many unique names, at their core they can usually be reduced to just a computer with some specific peripherals. This is especially the case for something like a router, a device found in just about any home these days. Certain consumer-grade routers may contain something special like a VDSL modem, but most of them just have a WAN Ethernet jack on one end and one or more LAN-facing Ethernet ports. All further functionality is implemented in software, including any firewall, routing and DHCP features. What this means is that any old PC with at least two Ethernet ports or equivalent can be a router as long as you install the appropriate software.