ZyXEL NBG420N Manuel d'utilisateur télécharger pdf (Page 215)

NBG420N User’s Guide

215

CHAPTER 19

Universal Plug-and-Play (UPnP)

This chapter introduces the UPnP feature in the web configurator.

19.1 Introducing Universal Plug and Play

Universal Plug and Play (UPnP) is a distributed, open networking standard that uses TCP/IP

for simple peer-to-peer network connectivity between devices. A 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.

See Section 19.3 on page 216 for configuration instructions.

19.1.1 How do I know if I'm using UPnP?

UPnP hardware is identified 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.

19.1.2 NAT Traversal

UPnP NAT traversal automates the process of allowing an application to operate through NAT.

UPnP network devices can automatically configure 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 NAT chapter for more information on NAT.

19.1.3 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.

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ZyXEL NBG420N Manuel d'utilisateur Page 215