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Figure 18 Configuration > WAN > NAT > General
The following table describes the labels in this screen.
Table 13 Configuration > WAN > NAT > General
LABEL
DESCRIPTION
General
Network Address
Network Address Translation (NAT) allows the translation of an Internet protocol address used
Translation (NAT)
within one network (for example a private IP address used in a local network) to a different IP
address known within another network (for example a public IP address used on the
Internet).
Select Enable to activate NAT. Select Disable to turn it off.
Default Server Setup
Default Server
You can decide whether you want to use the default server or specify a server manually. In
addition to the servers for specified services, NAT supports a default server. A default server
receives packets from ports that are not specified in the port forwarding summary table
below.
Select this to use the default server.
Change To Server
Select this and manually enter the server's IP address.
Port Forwarding (Max Limit : 16)
#
This is the number of an individual port forwarding server entry.
Name
Select a pre-defined service from the drop-down list box. The pre-defined service port
number(s) and protocol will be displayed in the port forwarding summary table. Otherwise,
select User define to manually enter the port number/range and select the Protocol.
Protocol
Select the transport layer protocol supported by this virtual server. Choices are TCP, UDP, or
TCP_UDP.
If you have chosen a pre-defined service in the Name field, the protocol will be configured
automatically.
External Port
This shows the port number(s) that identifies the service if you select a pre-defined service. If
you select User define in the Name field, enter the port number(s) manually.
Server IP Address
Select User define to manually enter the inside IP address of the virtual server here.
Internal Port
This shows the port number(s) that identifies the service if you select a pre-defined service. If
you select User define in the Name field, enter an internal port number manually or leave the
field blank for port range forwarding.
Add
Click
Delete
Click
Chapter 6 WAN
to add the rule in the port forwarding summary table.
to remove a rule.
EMG2881-T20A User's Guide
48
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