133
D14049.07
March 2010
Grey Headline
(continued)
TANDBERG
VIDEO COMMUNICATION SERVER
ADMINISTRATOR GUIDE
Introduction
Overview and
status
System
configuration
VCS
configuration
Zones and
neighbors
Clustering and
peers
Call
processing
Bandwidth
control
Firewall
traversal
Appendices
Applications
Maintenance
Firewall traversal and authentication
Overview
Client
Server
VCS Control or VCS Expressway
•
The VCS client provides its
Authentication username
and
Authentication password
. These are set on the traversal client zone
by using
VCS configuration > Zones > Edit zone
, in the
Configuration
section.
VCS Expressway
•
The traversal server zone for the VCS client must be configured
with the
Client authentication username
. This is set on the VCS
Expressway by using
VCS configuration > Zones > Edit zone
, in the
Configuration
section.
•
There must also be an entry in the VCS Expressway’s authentication
database with the corresponding client username and password.
Endpoint
•
The endpoint client provides its
Authentication ID
and
Authentication
Password
.
VCS Expressway
•
There must be an entry in the VCS Expressway’s authentication
database with the corresponding client username and password.
TANDBERG Gatekeeper (version 5.2 and earlier)
•
The Gatekeeper looks up its
System Name
in its own authentication
database and retrieves the password for that name. It then provides
this name and password.
VCS Expressway
•
The traversal server zone for the Gatekeeper client must be configured
with the Gatekeeper’s
System Name
in the
Client authentication
username
field. This is set on the VCS Expressway by using
VCS
configuration > Zones > Edit zone
, in the
Configuration
section.
•
There must be an entry in the VCS Expressway’s authentication
database that has the Gatekeeper’s System name as the username,
along with the corresponding password.
TANDBERG Gatekeeper (version 6.0 or later; 6.1 or later is the
recommended version)
•
The Gatekeeper provides its
Authentication Username
and
Authentication Password
. These are set on the Gatekeeper by
using
Gatekeeper Configuration > Authentication
, in the
External
Registration Credentials
section.
VCS Expressway
•
The traversal server zone for the Gatekeeper client must be configured
with the Gatekeeper’s
Authentication Username
. This is set on the
VCS Expressway by using
VCS configuration > Zones > Edit zone
, in
the
Configuration
section.
•
There must also be an entry in the VCS Expressway’s authentication
database with the corresponding client username and password.
VCS Control or VCS Expressway
•
If Authentication is On on the Border Controller, the VCS client provides
its
Authentication username
and
Authentication password
. These are
set on the traversal client zone by using
VCS configuration > Zones >
Edit zone
, in the
Configuration
section.
•
If the Border Controller is in
Assent
mode, the VCS client provides its
Authentication username
. This is set on the traversal client zone by
using
VCS configuration > Zones > Edit zone
, in the
Configuration
section.
TANDBERG Border Controller
•
If Authentication is On on the Border Controller, there must be an entry
in the Border Controller’s authentication database that matches the
VCS client’s
Authentication username
and
Authentication password
.
•
If the Border Controller is in
Assent
mode, the traversal zone
configured on the Border Controller to represent the VCS client must
use the VCS’s
Authentication username
in the Assent
Account name
field. This is set on the Border Controller via
TraversalZone > Assent >
Account name
.
To control which systems can use the VCS
Expressway as a traversal server, each VCS
Control or Gatekeeper that wants to be its
client must first authenticate with it.
Upon receiving the initial connection request
from the traversal client, the VCS Expressway
asks the client to authenticate itself by
providing its authentication credentials. The
VCS Expressway then looks up the client’s
credentials in its own authentication database.
If a match is found, the VCS Expressway
accepts the request from the client.
The settings used for authentication depend
on the combination of client and server being
used. These are detailed in the table opposite.
All VCS and Gatekeeper traversal
clients must authenticate with the VCS
Expressway, regardless of the VCS
Expressway’s
Authentication mode
setting.
However, endpoint clients are only required to
authenticate if the VCS Expressway’s
Authentication mode
is
On
.
All VCS and Gatekeeper traversal clients that
support H.323 must authenticate with the
VCS Expressway. The authentication process
makes use of timestamps and requires that
each system uses an accurate system time.
The system time on a VCS is provided by a
remote NTP server. Therefore, for firewall
traversal to work, all systems involved must be
configured with details of an NTP server
.
Authentication and NTP
