I have users traveling around the world that require to use VPN connection to access company file server.
However users reported that in certain countries, they are able to connect to VPN without any problem. But in some other countries, they are not able to connect to VPN.
The more recent reported case is having Error 721 which says the remote computer is not responding. The VPN connection get disconnected when the login reach the Verify user and password screen.
Our Server is Windows Server 2008 Standard R2 and using the built in VPN service provided by the Windows 2008.
The port open for VPN is only PPTP.
I have allowed Port TCP Port 47 and TCP Port 1723 NAT in my Firewall.
Does any one have this problem and how do you solve it?