We have a Dell laptop that connects via a Belkin F5D8635 router that doesn't appear to let the VPN function on the laptop to the remote office.
We have tried this in other locations (other homes, office etc) and it works fine so it is definatly down to the router.
We are going to open the PPTP ports on it (which are under the virtual servers options) but it specifies that you need to put the LAN ip of the target (the laptop) to router the port to.
My question is what if i want to just 'allow' this port through to the internal network and not to a specific machine ? it does allow me to put in 192.168.0.0 as the IP but i'm not confident this is doing what i think.