Draytek 2910 - Manual (Page 100)

Vigor2910 Series User’s Guide 94
3 3 . . 7 7 . . 4 4 U U P P n n P P
The UPnP (Universal Plug and Play) protocol is supported to bring to network connected
devices the ease of installation and configuration which is already available for directly
connected PC peripherals with the existing Windows 'Plug and Play' system. For NAT
routers, 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 provides the associated support for MSN
Messenger to allow full use of the voice, video and messaging features.
Enable UPNP Service Accordingly, you can enable either the Connection Control
Service or Connection Status Service.
After setting Enable UPNP Service 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.