having issues port forwarding on nh20t

[wireless]

Hi I've been trying to port forward a game server on a new desktop I have but even though it's locally accessible at that port, people externally aren't able to connect. The weird thing is if I move the game server to another desktop I have, and change the destination IP in the firewall rules it works. Does anyone have any ideas what could be the cause?

More... (https://forum.telus.com/t5/Internet-Home-Phone/having-issues-port-forwarding-on-nh20t/m-p/145025#M35307)