I have a DIR-665 (Dlink) router that I want to forward VPN via PPTP as well as L2TP to my OS X server. The VPN server is setup correctly, I can connect locally. The router has Virtual Server setup to point port 1701 requests to the proper servers static IP.
The issue is that as the server connects from an external network it simply hangs for a few seconds then faults. I've checked the Firewall settings on the router and it seems to be allowing VPN connections through.
At this point I'm at a complete loss and have no idea. :-(
Hopefully someone has experiences a similar situation.