Port Forwarding on Arris G36

I have been trying to port forward on my Arris G36, it does not show up in the app, so I cannot port forward from there. When I set the port forward on the Arris is seems like everything is fine, but there no access to the port from Canyouseeme.org. I get the following message.

Error: I could not see your service on (Ip is hidden for privacy)  on port (30000)
Reason: Connection timed out

I will be running my own virtual table top game and the port MUST be open. Any help would be appreciated.