Draytek Vigor2100V User Manual page 97

UPnP service Setup
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. ‡
1.Some Microsoft operating systems have found out the UPnP weaknesses and
hence you need to ensure that you have applied the latest service packs and
patches. ‡
2.Non-privileged users can control some router functions, including removing and
adding port mappings. ‡
3.The UPnP function dynamically adds port mappings on behalf of some
UPnP-aware applications. When the applications terminate abnormally, these
mappings may not be removed. ‡
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