Vcs As A Firewall Traversal Server - Cisco TelePresence Administrator's Manual

You do this by adding a new traversal client zone on the VCS client
configuring it with the details of the traversal server. See
information. You can create more than one traversal client zone if you want to connect to multiple traversal
servers.
Note that:
In most cases, you will use a VCS Control as a firewall traversal client. However, a VCS Expressway can
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also act as a firewall traversal client.
The firewall traversal server used by the VCS client can be a VCS Expressway, or (for H.323 only) a
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TANDBERG Border Controller.

VCS as a firewall traversal server

The VCS Expressway has all the functionality of a VCS Control (including being able to act as a firewall
traversal client). However, its main feature is that it can act as a firewall traversal server for other Cisco
systems and any traversal-enabled endpoints that are registered directly to it. It can also provide TURN relay
services to ICE-enabled endpoints.
Configuring traversal server zones
For the VCS Expressway to act as a firewall traversal server for Cisco systems, you must create and
configure a traversal server zone on the VCS Expressway
with the details of the traversal client. See
Note that you must create a separate traversal server zone for every system that is its traversal client.
Configuring other traversal server features
For the VCS Expressway to act as a firewall traversal server for traversal-enabled endpoints (such as
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Cisco MXP endpoints and any other endpoints that support the ITU H.460.18 and H.460.19 standards), no
additional configuration is required. See
To enable TURN relay services and find out more about ICE, see
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To reconfigure the default ports used by the VCS Expressway, see
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Cisco VCS Administrator Guide (X7.1)
Configuring traversal client zones
(VCS configuration >
Configuring traversal server zones
Configuring traversal for endpoints
Firewall traversal
(VCS configuration > Zones) and
for more
Zones) and configure it
for more information.
for more information.
About ICE and TURN services.
Configuring traversal server ports.
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