We have a BM3.8 server with VPN installed and working properly. We now have a vendor that needs access to a resource on our network. He installed the VPN client per our instructions and is able to authenticate to our VPN, but he cannot access the resources he needs. I know the routing is setup properly as I tested everything before we gave him the instructions. Upon talking to him, I learned that his LAN is on a 192.168.0.x network. Our main network is also 192.168.0.x and he would go through our main router to get to the resources he needs (which are located at 192.168.5.x).
I believe that the problem is that his LAN is in the same subnet as ours. Is there any way to fix this other than having him change the subnet of his local LAN?