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Page 166 / 268 Scroll up to view Page 161 - 165
Chapter 17 Universal Plug-and-Play (UPnP)
NBG4604 User’s Guide
166
•
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.
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.
When a UPnP device joins a network, it announces its presence with a multicast
message. For security reasons, the NBG4604 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.
17.4
UPnP Screen
Use this screen to enable UPnP. Click the
Management > UPnP
to open the
following screen.
Figure 98
Management > UPnP > General
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Chapter 17 Universal Plug-and-Play (UPnP)
NBG4604 User’s Guide
167
The following table describes the labels in this screen.
17.5
Technical Reference
The sections show examples of using UPnP.
17.5.1
Using UPnP in Windows XP Example
This section shows you how to use the UPnP feature in Windows XP. You must
already have UPnP installed in Windows XP and UPnP activated on the NBG4604.
Make sure the computer is connected to a LAN port of the NBG4604. Turn on your
computer and the NBG4604.
17.5.1.1
Auto-discover Your UPnP-enabled Network Device
1
Click
start
and
Control Panel
. Double-click
Network Connections
. An icon
displays under Internet Gateway.
Table 67
Management > UPnP > General
LABEL
DESCRIPTION
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 NBG4604's IP address
(although you must still enter the password to access the Web
Configurator).
Allow users to make port
forwarding changes
through UPnP
Select this check box to allow UPnP-enabled applications to
automatically configure the NBG4604 so that they can
communicate through the NBG4604, 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.
Apply
Click
Apply
to save the setting to the NBG4604.
Reset
Click
Reset
to begin configuring this screen afresh.
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Chapter 17 Universal Plug-and-Play (UPnP)
NBG4604 User’s Guide
168
2
Right-click the icon and select
Properties
.
Figure 99
Network Connections
3
In the
Internet Connection Properties
window, click
Settings
to see the port
mappings there were automatically created.
Figure 100
Internet Connection Properties
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Chapter 17 Universal Plug-and-Play (UPnP)
NBG4604 User’s Guide
169
4
You may edit or delete the port mappings or click
Add
to manually add port
mappings.
Figure 101
Internet Connection Properties: Advanced Settings
Figure 102
Internet Connection Properties: Advanced Settings: Add
Note: When the UPnP-enabled device is disconnected from your computer, all port
mappings will be deleted automatically.
5
Select
Show icon in notification area when connected
option and click
OK
.
An icon displays in the system tray.
Figure 103
System Tray Icon
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Chapter 17 Universal Plug-and-Play (UPnP)
NBG4604 User’s Guide
170
6
Double-click on the icon to display your current Internet connection status.
Figure 104
Internet Connection Status
17.5.2
Web Configurator Easy Access
With UPnP, you can access the web-based configurator on the NBG4604 without
finding out the IP address of the NBG4604 first. This comes helpful if you do not
know the IP address of the NBG4604.
Follow the steps below to access the Web Configurator.
1
Click
Start
and then
Control Panel
.
2
Double-click
Network Connections
.

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