Overview

NAT (Network Address Translation) is the translation of the IP address of a host in a packet.  Use port forwarding to make computers on a private network behind the ZyXEL router available outside the private network.  If the router has only one public IP address, you can make the computers in the private network available by using ports to forward packets to the appropriate private IP address.  Below is a step-by-step list of instructions on creating port forwarding rules on P660R devices.

Supported Devices

P-660R-F1
P-660R-51
P-660R-D1

Accessing the Web Configurator

To access the device web configuration screen to configure the modem/router, please connect your computer directly to an available LAN port.  A wired computer is needed to minimize downtime when making changes to the configuration.  During the configuration process the device may reboot to apply changes successfully, this means a temporary loss of connection to the network, this is why it is not recommended to make any configuration changes via wireless.

Open an internet browser (Internet Explorer, Mozilla Firefox, Google Chrome, etc.) and delete the contents of the address bar.  Type http://192.168.1.1 on the address bar and hit the enter/return key on the keyboard.  192.168.1.1 is the ZyXEL default IP address, if your ZyXEL modem/router was provided to you by the internet service provider it may be running proprietary firmware/software based on your provider's standards for operation.  If this is the case you may need to contact the service provider to obtain the IP address for the web configurator and login credentials (administrative credentials).  Once the correct web configurator address is entered on the browser, the following screen will appear requesting the administrator credentials.

Enter the ZyXEL administrative credentials:  password=1234 (if prompted for username=admin)

Or, enter the ISP proprietary administrator credentials:  must be obtained from the ISP

After the ZyXEL default credentials are entered a screen will appear asking to create a new administrator password.  Please create a new password to secure the configuration screen or click the Ignore button to skip the password change and continue to the configuration screen.

Depending on the modem model you may see a prompt asking to apply the default certificate.  Applying the ZyXEL default certificate, this is a self-signed certificate, is recommended to secure the configuration screen using HTTPS protocol.  This will allow you to make changes to the settings on the device while info between your machine and the modem/router are encrypted.  Click the Ignore button if you wish to continue using HTTP protocol to configure the device.

Port Forwarding

To create port forwarding rules for your favorite services please go to, Network → NAT.

In the NAT menu you will find about four tabs (depending on modem model), General, Port Forwarding, ALG and DMZ Hosting.  Click on the Port Forwarding tab to add rules to allow desired services through the router.

From the "Service Name" dropdown select one of the predefined services, or, select user defined to manually add your service.

• Check the box "Active" to activate the rule.
• Service Name – Provide a name for the port forward service.
• Start Port – Provide the start port number.
• End Port – Provide and end port number.  If only opening one port, start and end port should be the same.
• Server IP Address – Provide the IP address of the computer/server the P660R router needs to forward the traffic to.
• Click Apply to save the settings.
• Repeat the process to enter more forwarding rules.