I have a WRVS4400N with .13 fw installed. It is setup with a static WAN ip and mostly works fine. The problems appear when two people here are trying to connect via vpn to a SBS 2003 (static ip) in another location. The can each connect without a problem, but they cannot be connected both at the same time. PPTP PassThrough is enabled, but looking at the log in the router it's obviously a GRE problem. I'm guessing the router don't know how to handle two sessions using GRE at the same time. I've read some posts here at the forum where people talk about GRE/Nat-T compliance. I'm guessing the WRVS4400N isn't. Can this be fixed in a future fw update? Do I have to buy another router, or is there some workaround I can try?