I did just this in the 90s and into 2000s with an amd dx4-100, FreeBSD, two network cards and a hub. Best firewall I could have asked for, reports out the wazoo

I did just this in the 90s and into 2000s with an amd dx4-100, FreeBSD, two network cards and a hub. Best firewall I could have asked for, reports out the wazoo, and was very reliable. And it was all free!