ZyXEL P-663H-51 Guia Do Utilizador

Chapter 6 LAN Setup

P-663H-51 User’s Guide

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. 

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.

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 ZyXEL Device allows multicast messages only on the LAN.

All UPnP-enabled devices may communicate freely with each other without additional 
configuration. Disable UPnP if this is not your intention. 

You must have IIS (Internet Information Services) enabled on the Windows web server for 
UPnP to work.

Click Advanced Setup > LAN to open the IP screen. See 

background information. Some fields may not display depending on your WAN configuration.