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D14049.05
February 2009
Grey Headline
(continued)
TANDBERG
VIDEO COMMUNICATIONS SERVER
ADMINISTRATOR GUIDE
Introduction
Getting started
Overview and
status
System
configuration
VCS
configuration
Zones and
neighbors
Call
processing
Bandwidth
control
Firewall
traversal
Appendices
Applications
Maintenance
Registration control
Authentication using LDAP
Overview
If the VCS is using an LDAP server for authentication, the process is as follows:
The endpoint presents its username and authentication credentials (these are generated using
1.
its password) to the VCS, and the alias(es) with which it wishes to register
The VCS looks up the username in the LDAP database and obtains the authentication and alias
2.
information for that entry.
If the authentication credentials match those supplied by the endpoint, the registration will
3.
continue.
The VCS will then determine which alias(es) the endpoint will be allowed to attempt to register with,
based on the
alias origin
setting. For H.323 endpoints, you can use this setting to override the
aliases presented by the endpoint with those in the H.350 directory, or you can use them in addition
to the endpoint’s aliases. For SIP endpoints, you can use this setting to reject a registration if the
endpoint’s AOR does not match that in the LDAP database.
Configuring the LDAP server directory
The directory on the LDAP server should be configured to implement the
ITU H.350 specification [2
]
to store credentials for devices with which the VCS communicates. The directory should also be
configured with the aliases of endpoints that will register with the VCS.
For instructions on how to configure common LDAP servers, see the Appendix
LDAP
Configuratio
n
.
Securing the LDAP connection with TLS
The traffic between the VCS and the LDAP server can be encrypted using Transport Layer Security
(TLS).
To use TLS:
LDAP
•
Encryption
must be set to
TLS
the LDAP server must have a valid certificate installed, verifying its identity
•
The VCS must trust the certificate installed on the LDAP server.
•
The link
Upload a CA Certificate file for TLS
will take you to the
Security
page, where you can upload
a file that contains the trusted CA certificate for the LDAP server. This is required if the connection
between the VCS and the LDAP server is encrypted.
For more information on how to configure the VCS to trust the certificate installed on the LDAP
server, see the
Security
section.
!
TLS can be difficult to configure, so we recommend that you confirm that your LDAP
database is working correctly before you attempt to secure the connection with TLS. We
also recommend that you use a third party LDAP browser to verify that your LDAP server is
correctly configured to use TLS.
