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6 ADVANCED CONFIGURATION
DMS-CTC-20130228-0000 v1.0
6 Advanced configuration
Introduction
This chapters covers the more advanced features. The following topic are available:
Topic
Page
6.1 Port configuration for applications and services
44
6.1.1 UPnP
45
6.1.2 Port forwarding
47
6.1.3 Port triggering
49
6.1.4 Configure a DMZ Host
50
6.2 Assigning a reserved IP to a device
51
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6.1
Port configuration for applications and services
Introduction
The Gateway allows you to use one Internet connection for multiple computers. This means that all your computers share
one public IP address, as if only one computer were connected to the outside world.
Issue
When the Gateway receives an incoming message, the Gateway has to decide to which computer it has to send this
message.
If the incoming message is a response to an outgoing message originating from one of your computers, the Gateway sends
the incoming message to this computer.
But the Gateway will not be able to resolve the destination if:
The incoming message arrives on a different port as the outgoing message. Then the Gateway will not know that the two
messages are related.
There is no outgoing message.
Solutions
To avoid this problem, the Gateway offers the following solutions:
The Gateway supports automatic device discovery and port configuration for UPnP-enabled devices.
For more information, see
“6.1.1 UPnP” on page 45
.
The Gateway allows you to assign a port to a device.
For more information, see
“6.1.2 Port forwarding” on page 47
.
The Gateway allows you to define a number of trigger ports. When a device sends data over one of these ports, the
Gateway will automatically assign a number of related ports to the device. For more information, see
“6.1.3 Port triggering”
on page 49
.
Internet
Internet
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6.1.1 UPnP
Introduction
UPnP is designed to automate the installation and configuration of a (small) network as much as possible. This means that
UPnP-capable devices can join and leave a network without any effort of a network administrator.
Supported operating systems
The following operating systems support UPnP:
Windows 8
Windows 7
Windows Vista
Windows XP
UPnP and the Gateway
UPnP offers you the following functions:
You do not have to manually create port mappings to run services on a computer. The automatic port configuration
mechanism for UPnP-enabled games and applications will do this for you. If the application is UPnP-enabled, UPnP will
create these entries automatically.
You can access the
Admin Tool
without having to remember the address of the Gateway.
Enable UPnP on the Gateway
1
Browse to the Admin Tool.
For more information, see Admin Tool.
2
On the
Advanced
menu, click
Device Discovery
.
3
The
Device Discovery
page appears.
In the
Enable UPnP
list, select
Enabled
.
4
Click
SAVE
.
How use UPnP to access your Gateway on Windows 7/Vista
If you computer runs Windows 7/Vista:
1
On the Windows
Start
menu, click
Computer
.
2
An Explorer window appears. In the panel, click
Network
.
If your computer is running Windows XP, you first have to install the UPnP component. For more information, see
Windows help.
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3
If Explorer prompts you that network discovery and/or file sharing are turned off, click on the message and turn it on.
4
Right-click
Technicolor TC8305C
and click
View device web page
.
5
The Admin Tool appears.
How use UPnP to access your Gateway on Windows XP
If you computer runs Windows XP:
1
Go to
My Network Places
.
2
The
My Network Places
window appears:
3
Double-click
Technicolor TC8305C
.
4
The Admin Tool appears.
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6.1.2 Port forwarding
Introduction
Port forwarding allows you to forward incoming Internet traffic arriving on a specific port to an internal IP address.
For example: if you are running a web server and the Gateway receives a request on port 80, this request should be
forwarded to your web server.
Use a reserved IP address
The target device of the port forwarding rules will be specified by an IP address. Make sure that your device uses a fixed IP
address. If you do not do this, the device might get a new IP address after some time and the port forwarding rule will no
longer be applied to the device. For more information, see
6.2 Assigning a reserved IP to a device
.
Procedure
Proceed as follows to do so:
1
Browse to the Admin Tool.
For more information, see
“Accessing the Admin Tool” on page 25
.
2
On the left menu, click
Advanced
.
3
The
Port Forwarding
page appears.
In the
Enable Port Forwarding
list, click
Enabled
. In the
Port Forwarding
table, click
+ADD SERVICE
.
4
The
Add Service
page appears.
5
In the
Common Services
list, click the service you want to run on the computer or click
Other
if the service is not listed.
6
If you clicked
Other
, complete the following fields:
In the
Other Service
box, type a name for the services that you want to configure.
In the
Service Type
list, click the protocol that is used by the service.
In the
Starting Port
box, type the start port number of the port range.
In the
End port
box, type the last port number of the port range. If you only want to specify one port, use the same
number as in the
Starting Port
box.
7
In the
Service IP address
box, type the IP address of the computer to which you want to assign the service.
8
Click
ADD
.

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