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the major feature of UPnP on the router is "NAT Traversal". This enables applications inside
the firewall to automatically open the ports that they need to pass through a router. It is more
reliable than requiring a router to work out by itself which ports need to be opened. Further,
the user does not have to manually set up port mappings or a DMZ. UPnP is available on
Windows XP and the router provide the associated support for MSN Messenger to allow full
use of the voice, video and messaging features.
After setting Enable UPnP setting, an icon of IP Broadband Connection on Router on
Windows XP/Network Connections will appear. The connection status and control status will
be able to be activated. The NAT Traversal of UPnP enables the multimedia features of your
applications to operate. This has to manually set up port mappings or use other similar
methods. The screenshots below show examples of this facility.
The UPnP facility on the router enables UPnP aware applications such as MSN Messenger to
discover what are behind a NAT router. The application will also learn the external IP address
and configure port mappings on the router. Subsequently, such a facility forwards packets from
the external ports of the router to the internal ports used by the application.
VigorFly 210 Series User's Guide
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