I tested the VPN internally using the local ip address and it works fine. As soon as I try it from the wan on a remote computer it will not work. Gives me this "error 789: The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with remote computer" This is on a server 2008 r2 platform with a L2TP\IPSEC VPN with a preshared key. Port 1701 tcp\udp mapped over the local server address. Are there and other ports the need to be mapped? What I have checked so far I have mapped over the port in the router, However when I use the online open port checker tool it cant find the service. I tested a http file server on that port and it saw my service to the port is not being block by my router. The Firewall is a set to allow the connection over the correct network interface. Edge translation is allowed Any ideas?