Draytek 2900 - Manual (Page 109)

Vigor2900 Series User’s Guide 103
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.
The reminder as regards concern about Firewall and UPnP -
Can't work with Firewall Software
Enabling firewall applications on your PC may cause the UPnP function not
working properly. This is because these applications will block the accessing
ability of some network ports.
Security Considerations
Activating the UPnP function on your network may incur some security threats.
You should consider carefully these risks before activating the UPnP function.