Microsoft Windows 7 PPTP issues: spurious ICMP protocol-unreachable sent
I was recently confronted to a strange issue with a PPTP VPN connection to a central site. Some users could connect and some others could not. They all used Windows 7 with SP1, configured the same way, and all computers were behind NAT/PAT routers but not necessarily on the same site. On the VPN server, the only information I could get was this log stating the GRE protocol was unreachable:...