User's Manual

Chapter 11 Network Address Translation (NAT)
NBG-460N User’s Guide
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11.4 NAT Application Screen
Port forwarding allows you to define the local servers to which the incoming
services will be forwarded.
A port forwarding set is a list of inside (behind NAT on the LAN) servers, for
example, web or FTP, that you can make accessible to the outside world even
though NAT makes your whole inside network appear as a single machine to the
outside world.
Use the Application screen to forward incoming service requests to the server(s)
on your local network. You may enter a single port number or a range of port
numbers to be forwarded, and the local IP address of the desired server. The port
number identifies a service; for example, web service is on port 80 and FTP on
port 21. In some cases, such as for unknown services or where one server can
support more than one service (for example both FTP and web service), it might
be better to specify a range of port numbers.
In addition to the servers for specified services, NAT supports a default server. A
service request that does not have a server explicitly designated for it is
forwarded to the default server. If the default is not defined, the service request is
simply discarded.
Note: Many residential broadband ISP accounts do not allow you to run any server
processes (such as a Web or FTP server) from your location. Your ISP may
periodically check for servers and may suspend your account if it discovers any
active services at your location. If you are unsure, refer to your ISP.
Server IP
Address
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 Application screen.
If you do not assign a Default Server IP address, the NBG-460N
discards all packets received for ports that are not specified in the
Application screen or remote management.
Wake up this
target by Wake
On LAN
Select this to use WoL (Wake On LAN) to turn on the server specified in
the Server IP Address field when packets are received on ports not
specified in the Application screen.
Note: For more information on Wake On LAN see Section 22.6 on
page 295.
Apply Click Apply to save your changes back to the NBG-460N.
Reset Click Reset to begin configuring this screen afresh.
Table 58 Network > NAT > General
LABEL DESCRIPTION