ZyXEL Communications p-2612HNU-FX User Manual

Chapter 8 Network Address Translation (NAT)

P-2612HNU-Fx User’s Guide

Server IP 
Address

Enter the IP address of the server for the specified service.

External Port 
Start 

Enter the original destination port for the packets.

To forward only one port, enter the port number again in the External 
Port End field. 

To forward a series of ports, enter the start port number here and the 
end port number in the External Port End field.

External Port 
End 

Enter the last port of the original destination port range. 

To forward only one port, enter the port number in the External Port 
Start field above and then enter it again in this field. 

To forward a series of ports, enter the last port number in a series that 
begins with the port number in the External Port Start field above.

Internal Port 
Start 

This shows the port number to which you want the ZyXEL Device to 
translate the incoming port.

Internal Port 
End 

This shows the last port of the translated port range.

Protocol

Select the protocol supported by this virtual server. Choices are TCP, 
UDP, or TCP/UDP.

Add

Click this button to add a rule to the table below.

The table below shows a summary of the values entered in the previous fields.
#

This is the rule index number (read-only).

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.

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.

External Start 
Port 

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

External End 
Port 

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

Internal Start 
Port 

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

Internal 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.

Table 34   Network > NAT > Port Forwarding