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ADSL2+ Wireless N150 Modem Router User Guide YML14WN
36 www.netcomm.com.au
Universal Plug-and-Play (UPnP)
Universal Plug and Play Overview
Universal Plug and Play (UPnP) is a distributed, open networking standard that uses TCP/IP for simple peer-to-peer network connectivity
between devices. An UPnP device can dynamically join a network, obtain an IP address, convey its capabilities and learn about other
devices on the network. In turn, a device can leave a network smoothly and automatically when it is no longer in use.
How do I know if I’m using UPnP?
UPnP hardware is identied as an icon in the Network Connections folder (Windows XP). Each UPnP compatible device installed on your
network will appear as a separate icon. Selecting the icon of a UPnP device will allow you to access the information and properties of that
device.
NAT Traversal
UPnP NAT traversal automates the process of allowing an application to operate through NAT. UPnP network devices can automatically
congure network addressing, announce their presence in the network to other UPnP devices and enable exchange of simple product and
service descriptions. NAT traversal allows the following:
• 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 Network Address Translation (NAT) chapter for further information about NAT.
Cautions with UPnP
The automated nature of NAT traversal applications in establishing their own services may present network security issues. Network
information and conguration may also be obtained and modied by users in some network environments.
All UPnP-enabled devices may communicate freely with each other without additional conguration. Disable UPnP if this is not your
intention.
UPnP broadcasts are only allowed on the LAN.
See later sections for examples of installing UPnP in Windows XP and Windows Me as well as an example of using UPnP in Windows.
Conguring UPnP
From the Site Map in the main menu, click UPnP under Access Management to display the screen shown next.
The following table describes the labels in this screen.
LABEL DESCRIPTION
UPnP Select this checkbox to activate UPnP. Be aware that anyone could use a UPnP application to open the web conguration’s login screen without
entering NB14WN’s IP address (although you must still enter the password to access the web conguration).
Auto congured Select this check box to allow UPnP-enabled applications to automatically congure the NB14WN so that they can communicate through the
device. For example by using NAT traversal, UPnP applications automatically reserve a NAT forwarding port in order to communicate with another
UPnP enabled device; this eliminates the need to manually congure port forwarding for the UPnP enabled application.
Apply Click Apply to save your settings back to home screen.