Question: zyxel how to open ports?
Answer: 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.”