Draytek Vigor 2200V, User Manual

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Application Setup
7-12
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.