Port Forwarding Arris TG1672 router

To create a port forwarding entry on your Arris TG1672 router, follow these steps:

Select Add New/Create tab on your router
Enter a name on the Description/ Application name. This name serves as a reminder of the reason for the forward.
Input the static IP address of the device receiving the forwarded ports
Enter the ports you are forwarding in the Global Port Range boxes.
Select the protocol, whether TCP, UDP, or Both, in the Protocol dropdown.
In case you see the External IP addresses field, input 0.0.0.0 in it.
Select the Enable checkbox if available on your router
Once you finish, click Save to enable port forwarding on your Arris TG1672G router.
After creating the port forward entry, test it to ensure the ports are open.