Hotspot with PPTP support

Hi All

I’ve got the Hotspot up and running talking nice to Radiator RADIUS and all is well.

I’d like to provide PPTP VPN access to the Mikrotik box from the public-hotspot wireless network to provide a level of security.

What I’d like is that users on the wireless hotspot can PPTP to the Mikrotik box and then NAT behind the Mikrotik in the same way they would by not using PPTP. This would then provide security across the wireless network.

Has anybody done anything similar? I’ve had a quick play with the PPTP server but I havent yet managed to get things up and running. Obviously they’ll be rules required to allow GRE etc?