Chapter 11 Network Address Translation (NAT)
See Appendix F on page 286 for port numbers commonly used for particular services.
Note: Make sure NAT is activated on the WAN connection before you configure a port forwarding rule for it. For the default WAN connection (PVC0), activate NAT in the Network Setting > NAT > General screen. For other WAN connections (PVC1~PVC7), activate NAT for an individual WAN connection in the Broadband > More Connections > Edit screen.
Figure 71 Network Setting > NAT > Port Forwarding
The following table describes the fields in this screen.
Table 52 Network Setting > NAT > Port Forwarding
LABEL | DESCRIPTION |
WAN Interface | Select a WAN connection for which you want to configure a port forwarding rule. A 3G |
| option is available only when you enable the 3G backup function. |
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Add new rule | Click this button to add a rule to the table below. |
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# | This is the rule index number |
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Active | This field indicates whether the rule is active or not. |
| Clear the check box to disable the rule. Select the check box to enable it. |
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Service Name | This is a service’s name. |
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External Start Port | This is the first port number of a port range that incoming service requests may use to |
| access the service in your local network. |
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External End Port | This is the last port number of a port range that incoming service requests may use to |
| access the service in your local network. |
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Internal Start Port | This is the starting port number that the device translates for the service in your local |
| network. |
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Internal End Port | This is the ending port number that the device translates for the service in your local |
| network. |
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Server IP Address | This is the server’s IP address in your local network. |
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Modify | Click the edit icon to go to the screen where you can edit the port forwarding rule. |
| Click the delete icon to delete an existing port forwarding rule. Note that subsequent |
| address mapping rules move up by one when you take this action. |
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11.3.2 Port Forwarding Rule Add/Edit
Use this screen to add or edit a port forwarding rule. Click the Add new rule button or a rule’s edit icon in the Port Forwarding screen to display the screen as shown next.
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