If you have a Lion server behind a NAT router (for example, an Airport Extreme or Time Capsule) that is running a VPN service you may have difficulties connecting to it with Windows 7 using L2TP despite the correct setup. I won’t go into the deep dive on this now, but just a total quick tip. You need to change the encapsulation parameters on Windows 7. Do that by setting a registry key:
After a tremendous ordeal of trying to install OS X Lion on my January 2008 Mac Pro, I finally had a breakthrough. I discovered what appears to be a hardware incompatibility. To properly tell this story we’ll have to go back in time. In January of 2008 when this model of Mac Pro was available (version 3.1) it was definitely the cat’s meow. I bought a true boss of a system too.