A while back, we wrote a post about setting up the VPN server in Lion Server. It has been a very popular page and a help to quite a few people. 

Since Mountaion Lion was released, there were some more changes on setting up the VPN service. We reached out to a MMC friend, Rusty Ross and asked him to help us get a new post written specifically for Mountain Lion. So here it is:

Tutorial for setting up VPN Server in Mountain Lion Server

As usual, you can get us on twitter @macminicolo if you have any questions, or if you're looking for a good place to host a VPN server.