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7
ADVANCED CONFIGURATION
DMS3-CTC-25-114 v1.0
7.1 Port configuration for applications and services
Introduction
The MediaAccess 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 MediaAccess Gateway receives an incoming message, the MediaAccess 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
MediaAccess Gateway sends the incoming message to this computer.
But the MediaAccess Gateway will not be able to resolve the destination if:
The incoming message arrives on a different port as the outgoing message. Then the MediaAccess Gateway will not know
that the two messages are related.
There is no outgoing message.
Solutions
To avoid this problem, the MediaAccess Gateway offers the following solutions:
The MediaAccess Gateway supports automatic device discovery and port configuration for UPnP-enabled devices.
For more information, see “7.1.1 UPnP” on page 56.