ZyXEL Communications 2 Plus User Manual

Chapter 22 UPnP

ZyWALL 2 Plus User’s Guide

When a UPnP device joins a network, it announces its presence with a multicast message. For 
security reasons, the ZyWALL 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. 

ZyXEL has achieved UPnP certification from the Universal Plug and Play Forum  UPnP™ 
Implementers Corp. (UIC). ZyXEL's UPnP implementation supports IGD 1.0 (Internet 
Gateway Device). 
See the following sections for examples of installing and using UPnP.

Click ADVANCED > UPnP to display the UPnP screen. 

Figure 265   ADVANCED > UPnP

The following table describes the fields in this screen.  

Table 128   ADVANCED > UPnP

UPnP Setup

Device Name

This identifies the ZyXEL device in UPnP applications.

Enable the Universal 

Plug and Play (UPnP) 

feature 

Select this check box to activate UPnP. Be aware that anyone could use a 

UPnP application to open the web configurator's login screen without 

entering the ZyWALL's IP address (although you must still enter the 

password to access the web configurator).

Allow users to make 

configuration 

changes through 

UPnP

Select this check box to allow UPnP-enabled applications to automatically 

configure the ZyWALL so that they can communicate through the ZyWALL, 

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 configure port 

forwarding for the UPnP enabled application. 

Allow UPnP to pass 

through Firewall

Select this check box to allow traffic from UPnP-enabled applications to 

bypass the firewall. 

Clear this check box to have the firewall block all UPnP application packets 

(for example, MSN packets).