Port Configuration For Applications And Services - Technicolor TC8717C Setup And User Manual

7.1 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
The Gateway allows you to assign a port to a device.

For more information, see
54
"7.1.1 UPnP" on page 56.
"7.1.2 Port forwarding" on page 58.
DMS-CTC-20131021-0004 v1.0