I setup a Draytek Vigor 2910 router on my home virgin cable broadband service and tested the VPN connection. All worked fine.
I then take the same router to my customers business where they rent office space and are given internet access from the main network in the building.
Now I can no lomger get my VPN access.
The internet works fine and we can use 'GoToMyPC' just fine too.
The guys who run the main building network swear blind that nothing is being blocked from their end.
On the WAN setup of the Vigor router we get assigned an IP address of 10.0.70.50 from the buildings main network and a gateway IP address of 10.0.70.1. So in theory, as nothing is being blocked, this should be a similar setup to my Virgin cable connection, right?
The router run the small office network on an IP address range of 192.168.3.?.