I had previously setup a few FreeBSD systems to act as PPTP servers for places that I had them acting as firewalls using mpd. However, I was constantly running into problems with “No buffer space available” and packets would drop, connections would be sluggish, etc.
I was just doing some system upgrades and decided to look at other options. I found a port called poptop “the pptp server for linux” in the ports distribution, and even a howto online detailing what my configs should look like. So I gave it a shot: