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TANDBERG VIDEO COMMUNICATIONS SERVER ADMINISTRATOR GUIDE
Firewall Traversal and Dual Network Interfaces |
| Firewall Configuration |
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The Dual Network Interfaces option enables the LAN 2 interface on your VCS Expressway (the option is not available on a VCS Control). The LAN 2 interface is used in situations where your VCS Expressway is located in a DMZ that consists of two separate networks - an inner DMZ and an outer DMZ - and your firewall rules prevent communication between the two.
With the LAN 2 interface enabled, you can configure the VCS with two separate IP addresses, one for each network in the DMZ. Your VCS then acts as a proxy server between the two networks, allowing calls to pass between the internal and outer firewalls that make up your DMZ.
All ports configured on the VCS, including those relating to firewall traversal, will apply to both IP addresses; it is not possible to configure these ports separately for each IP address.
In order for Expressway™ firewall traversal to function correctly, the firewall must be configured to:
•allow initial outbound traffic from the client to the ports being used by the VCS Expressway
•allow return traffic from those ports on the VCS Expressway back to the originating client.
TANDBERG offers a downloadable tool, the Expressway Port Tester, that allows you to test your firewall configuration for compatibility issues with your network and endpoints. It will advise if necessary which ports may need to be opened on your firewall in order for the Expressway™ solution to function correctly. The Expressway Port Tester currently only supports H.323. Contact your TANDBERG representative for more information.
We recommend that you turn off any H.323 and SIP protocol support on the firewall: these ! are not needed in conjunction with the TANDBERG Expressway™ solution and may interfere
with its operation.
Introduction | Getting Started |
| Overview and |
| System |
| VCS |
| Zones and |
| Call |
| Bandwidth | Firewall | Applications |
| Maintenance |
| Appendices |
| Status |
| Configuration |
| Configuration |
| Neighbors |
| Processing |
| Control | Traversal |
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D14049.04 |
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JULY 2008 |
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