Field
Description
Trials
Enter the number of ping tests to be performed until Destina-
tion IP Address as
=
applies.
The default value is
C
.
15.8 UPnP
Universal Plug and Play (UPnP) makes it possible to use current messenger services
(e.g. real time video/audio conferencing) as peer-to-peer communication where one of the
peers lies behind a NAT-enabled gateway.
UPnP enables (mostly) Windows-based operating systems to take control of other
devices with UPnP functionality on the local network. These include gateways, access
points and print servers. No special device drivers are needed as known common proto-
cols are used, such as TCP/IP, HTTP and XML.
Your gateway makes it possible to use the subsystem of the Internet Gateway Device
(IGD) from the UPnP function range.
In a network behind a NAT-enabled gateway, the UPnP-configured computers act as LAN
UPnP clients. To do this, the UPnP function on the PC must be enabled.
The pre-configured port used for UPnP communication between LAN UPnP clients and
the gateway is
DFE
. The LAN UPnP client acts as a so-called service control point, i.e. it
recognizes and controls the UPnP devices on the network.
The ports assigned dynamically by, for example, MSN Messenger, lie in the range from
-
to
DC
. The ports are released internally to the gateway on demand, i.e. when an
audio/video transfer is started in Messenger. When the application is closed, the ports are
immediately closed again.
The peer-to-peer-communication is initiated via public SIP servers with only the informa-
tion from the two clients being forwarded. The clients then communicate directly with one
another.
For further information about UPnP, see
15.8.1 Interfaces
In this menu, you configure the UPnP settings individually for each interface of your gate-
way.
You can determine whether UPnP requests from clients are accepted by each interface
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15 Local Services
hybird 120 Gigaset Edition
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