Open an
Internet Browser and type
192.168.200.1 into the address bar to access the ZyXEL user interface.
Highlight Network Settings, then select
NAT.
Click the
Applications tab at the top of the screen, then click
Add new application.
From the
Application Categorey drop-down menu, select the type of device you want to configure.

From the
Application Forwarded drop-down menu, check to see if your desired device has already been configured with port forwarding.
If you locate your desired service within this drop-down menu, select it and click
Apply to save your changes.
If you DO NOT locate your desired service, close the
Application Configuration window by clicking the
X in the upper right-hand corner.
At the top of the
NAT page, click the
Port Forwarding tab, then click
Add new rule.

In the
Port Forwarding configuration screen, check the box next to
Active.
In the service name field, type a recognizable phrase to describe the application you are configuring.
From the
WAN Interface drop-down menu, select the type of WAN interface you are currently using.
Enter the necessary port numbers from the device's manufacturer.
If you are entering a port range (i.e. 501-509), enter the port number into both the
External Port Start field, and enter the final number in the range into the External Port End field.
NOTE: In most cases, the port numbers you enter in the
External Port fields and the
Internal Port fields will be the same (i.e. if you enter 501 in the
External Port Start and 509 into the
External Port End fields, you will enter 501 into the
Internal Port Start and 509 into the
Internal Port End field.)
From the Protocol drop-down menu, select the protocol associated with the port or port range.
In the
Server IP Address field, enter the IP address of the device. The device manufacturer will provide the IP address for the device.
Click the
Apply button to save your changes.
See Also
How do I set or change my network name (SSID/Encryption Key)?
How do I name my wireless network and set a Wi-Fi password?