ZyXEL Communications P-2812HNU-51c, User Manual

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Chapter 8 Network Address Translation (NAT)
P-2812HNU-51c User’s Guide
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The following table describes the labels in this screen.
Table 42 NAT Port Forwarding
LABEL DESCRIPTION
Service Name Select a pre-defined service from the drop-down list box. The pre-
defined service port number(s) and protocol will display in the External
port, Internal port and Protocol fields.
Otherwise, select User Define to open the Rule Setup screen where
you can manually enter the port number(s) and select the IP protocol.
WAN Interface Select the WAN interface through which the service is forwarded.
You must have already configured a WAN connection with NAT enabled.
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 Enter the port number to which you want the P-2812HNU-51c to
translate the incoming port.
To forward only one port, enter the port number again in the Internal
Port End field.
For a range of ports, enter the first number of the range to which you
want the incoming ports translated.
Internal Port
End Enter the last port of the translated port range.
Protocol This is the transport layer protocol used for the service.
Add Click this button to add a rule to the table below.
No. 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.
Server Name This field displays the name of the service used by the packets for this
virtual server.
WAN Interface This field displays 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.