I have a windows server 2003 machine which is connected directly to the internet. It is performing the function of a NAT server/ router / DHCP server, as well as a VPN server. It is not on a domain. I am using Rogers High-speed internet as my ISP.
I live in the same city as the server. When I try to ping the server from my home, it works fine, and I can connect to the VPN.
When I travel to the next city and try to connect from a more remote location, the ping fails to go through, and the VPN fails.
After some talks with Rogers, I discovered that DISABLING the "Basic Firewall" in RRAS for the WAN connection suddenly made the pings go through!
Well... clearly I can't just disable the firewall, but it is what is causing the problem and I don't see anywhere obvious that would cause this kind of blocking to occur.
Attached is a few screenshots of the configuration. Any help would be greatly appreciated.