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Page 116 / 244 Scroll up to view Page 111 - 115
Chapter 13 Remote Management
NBG-416N User’s Guide
116
Page 117 / 244
NBG-416N User’s Guide
117
C
HAPTER
14
Universal Plug-and-Play (UPnP)
14.1
Overview
This chapter introduces the UPnP feature in the Web Configurator.
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.
14.2
What You Need to Know
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.
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.
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Chapter 14 Universal Plug-and-Play (UPnP)
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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 NBG-416N 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.
14.3
UPnP Screen
Use this screen to enable UPnP. Click the
Management > UPnP
to open the
following screen.
Figure 68
Management > UPnP > General
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Chapter 14 Universal Plug-and-Play (UPnP)
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The following table describes the labels in this screen.
14.4
Technical Reference
The sections show examples of using UPnP.
14.4.1
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 NBG-416N.
Make sure the computer is connected to a LAN port of the NBG-416N. Turn on
your computer and the NBG-416N.
14.4.1.1
Auto-discover Your UPnP-enabled Network Device
1
Click
start
and
Control Panel
. Double-click
Network Connections
. An icon
displays under Internet Gateway.
Table 46
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 NBG-416N'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 NBG-416N so that they can
communicate through the NBG-416N, 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 NBG-416N.
Reset
Click
Reset
to begin configuring this screen afresh.
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Chapter 14 Universal Plug-and-Play (UPnP)
NBG-416N User’s Guide
120
2
Right-click the icon and select
Properties
.
Figure 69
Network Connections
3
In the
Internet Connection Properties
window, click
Settings
to see the port
mappings there were automatically created.
Figure 70
Internet Connection Properties

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