I have an ISA 2006 standard edtion with PPTP VPN access configured. It was working fine until the last reboot. Eversince then PPTP is no longer working.
There is no process listening on port 1723. Checking the RRAS configuration reveals that there are no PPTP miniports configured anymore.
- They are not configurable via the RRAS console.
- Removing and reinstalling the PPTP miniport using devcon.exe did not help.
- Reconfiguring the NICs did not help.
Restoring the server from a backup made at a point of time where the PPTP was still working shows up the same problem now.