Hi, I hit a small problem when setting up a Site-to-site VPN within TMG 2010.
I've created a Site-to-site PPTP VPN connection as advised here, http://www.isaserver.org/tutorials/Configuring-PPTP-Site-to-Site-VPN-Microsoft-Forefront-TMG.html However, the Site to Site doesn't connect. If you go into Routing and Remote Access you see the new Demand-dial Network Interface, with the connection state as Disconnected.
If you try to connect you receive the below error.
'An error occurred during connection of the interface. The network connection between your computer and the VPN server was interrupted. This Can be caused by a problem in the VPN transmission and is commonly the result of internet latency or simply that your VPN server has reached capacity. Please try to reconnect to the VPN server. If the problem persists, Contact the VPN administrator and analyze quality of network connectivity.' Then within Routing and remote access the connection state changes to Unreachable.
This is the first and only VPN connection created on the TMG server (VPN-HO) and network connectivity is fine. I've deleted the Site-to-site VPN and re-created it but still get the same error. The TMG server (TMG-RO) at the other end of the Site to site can connect to this TMG (TMG-HO) fine but any outgoing connections from TMG-HO to other TMG servers receive the above message.
Hope this makes sense and any ideas or help is most welcome.
Kind Regards
For5six
