In a sleepy haze, I selected “Disable Routing and Remote Access” instead of just “All Tasks > Restart” and ever since then, I’ve had a problem.
The Server is running Terminal Server and now when I start the VPN, Terminal Server is un-ping-able. When I Stop the VPN process, Terminal Server is available again.
None of the outside networking was changed so I have to believe it’s an internal problem with the server settings. I’ve modified the In/Out Filters to include UDP Ports 3389, 50 and 51 just in case.
So the question is what have I done wrong?