I just set up a VPN server on my Windows server box. It's working perfectly when I try to connect using PPTP on my Mac, iPhone, and Windows laptop, and when I try to use PPTP or L2TP over IPSec on my Windows laptop. But I can't connect to it using my Mac or iPhone and L2TP. Since it's working with my PC laptop, I'm thinking that there's an incorrect setting on my Mac or on the server. Does the Mac require any specific settings, or should the default settings work, and something is just broken? I'm running 10.6.2, fully updated, and Windows Server Enterprise 2008 x64, fully updated. The PC laptop is running a fresh install of Vista Home Edition (no updates).