ZyXEL Communications P-661HNU-Fx User Manual

 Chapter 11 Network Address Translation (NAT)

ADSL Series User’s Guide

Click Network Setting > NAT to open the Port Forwarding screen.

See 

 for port numbers commonly used for particular services. 

Network Setting > NAT > Port Forwarding

The following table describes the fields in this screen. 

This screen lets you create or edit a port forwarding rule. Click Add new rule in the Port 
Forwarding screen or the Edit icon next to an existing rule to open the following screen.

Network Setting > NAT > Port Forwarding

Add new rule

Click this to add a new port forwarding rule.

#

This is the index number of the entry.

Status

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.

Service Name

This is the service’s name. This shows User Defined if you manually added a service. 
You can change this by clicking the edit icon.

WAN Interface

This shows the WAN interface through which the service is forwarded.

Start Port 

This is the first external port number that identifies a service.

End Port 

This is the last external port number that identifies a service.

Translation Start 
Port

This is the first internal port number that identifies a service.

Translation End 
Port

This is the last internal port number that identifies a service.

Server IP Address

This is the server’s IP address.

Protocol

This shows the IP protocol supported by this virtual server, whether it is TCP, UDP, or 
TCP/UDP.

Modify

Click the Edit icon to 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.

Apply

Click Apply to save your changes.

Cancel

Click Cancel to restore your previously saved settings.