Have a bit of a problem that would appreciate any assistance with.
I have a 7402x router. We are using it on a BT cable line plugged into port one on the Router.
I can see the outside world and access the router via the external IP address.
The issue i have is with port forwarding. For the life of me I can’t seem to get it working.
I am trying to port forward to a server on the Lan side of the network but it just keeps dropping. I have another line installed and can port forward ok from that line. It is also using a Billion Router all be it a older model.
I think the issue may be with the BT modem but they are telling me that the modem by default has everything open.
Any help appreciated before I go completely grey

Cheers
Cheers