Before I go into the rant I need to state that overall, the Apple Airport Extreme Base Station is a very good residential router, in most cases. In my experience, it’s very stable and most of the features work very well.
But not all of the features… and this one’s a real pain to work with and could be a deal-breaker for many considering purchasing this device. If you plan to use Microsoft VPN PPTP to connect to a system within your network then I suggest that you do not purchase an AEBS.
The description states that it supports VPN PPTP pass-through. Well, I guess that’s only guaranteed for outgoing connections (not specified) or it’s an incompatibility with Microsoft PPTP connections. It would take too long to describe the various forum posts, support documents, and other resources I’ve combed through trying to figure out how to make this work. I’ve spent countless hours trying to find a work-around but I just can’t make it work.