Belkin Wireless G Router User Manual page 92

Using the Web-Based Advanced User Interface
Enabling/Disabling Network Address Translation (NAT)
Note: This advanced feature should be modified by advanced users only.
NAT is the method by which the Router shares the single IP address
assigned by your ISP with the other computers on your network and is
enabled by default. NAT should only be disabled if your ISP assigns you
multiple IP addresses or you need NAT disabled for an advanced system
configuration. If you have a single IP address and you turn NAT off,
the computers on your network will not be able to access the Internet.
Other problems may also occur. Turning off NAT will disable your firewall
functions.
Enabling/Disabling UPnP
UPnP (Universal Plug-and-Play) is yet another advanced feature offered
by your Belkin Router. It is a technology that offers seamless operation of
voice messaging, video messaging, games, and other applications that
are UPnP-compliant. Some applications require the Router's firewall to
be configured in a specific way to operate properly. This usually requires
opening TCP and UDP ports. An application that is UPnP-compliant has
the ability to communicate with the Router, basically "telling" the Router
which way it needs the firewall configured. The Router ships with the
UPnP feature disabled. If you are using any applications that are
UPnP-compliant, and wish to take advantage of the UPnP features,
you can enable the UPnP feature. Simply select "Enable" in the "UPnP
Enabling" section of the "Utilities" page. Click "Apply Changes" to save
the change.
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