Step 1: Login to the ZyXEL router via the default gateway address.
Step 2: Click on “Network” and then “NAT.”
Step 3: Once on the “NAT” page click “Application” or “Port Forwarding”, depending on your router.
Step 4: Click on “Active.” Enter a Service Name, Port Number and Server IP Address. Then click “Apply.”
You should now be able to connect to your device via a web browser. Simply enter your hostname followed by the port number into the address bar. For example http://hostname.ddns.net:8000
Please Note: If you are using a mobile application, you will simply need to use your hostname to connect. The application should already specify the port when attempting to make the connection.