Chapter 18 Universal Plug-and-Play (UPnP)
NBG4604 User’s Guide
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• Dynamic port mapping
• Learning public IP addresses
• Assigning lease times to mappings
Windows Messenger is an example of an application that supports NAT traversal
and UPnP.
See the NAT chapter for more information on NAT.
Cautions with UPnP
The automated nature of NAT traversal applications in establishing their own
services and opening firewall ports may present network security issues. Network
information and configuration may also be obtained and modified by users in some
network environments.
When a UPnP device joins a network, it announces its presence with a multicast
message. For security reasons, the NBG4604 allows multicast messages on the
LAN only.
All UPnP-enabled devices may communicate freely with each other without
additional configuration. Disable UPnP if this is not your intention.
18.4 UPnP Screen
Use this screen to enable UPnP. Click the Management > UPnP to open the
following screen.
Figure 97 Management > UPnP > General
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