Chapter 10; Universal Plug And Play Overview; Cautions With Upnp - Telkom ADSL 5100 Instruction Manual

This chapter introduces the UPnP feature in the web configurator.

10.1 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.
10.1.1 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.
10.1.2 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 Network Address Translation (NAT) chapter for further information about NAT.

10.2 Cautions with UPnP

The automated nature of NAT traversal applications in establishing their own services may
present network security issues. Network information and configuration may also be obtained and
modified by users in some network environments.
Universal Plug-and-Play (UPnP)

Chapter 10

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