Dears

Good evening, I have problem about video conferencing issue,
I have one machine fro my side ( inside network ), and other machine
Locates at other side ( outside or internet ). When we try to initaite the conference
We couldn't complete.
We monitor the traffic from hope to next hope, we find that the traffic reachs the other side,
But once it reaches our firewall it stopped. We open access list ip any any from outside
To all ports. Why the trafiic stopes. All ports are opened from any ip from outside.
Does video conference have special configuration on firewall ?

Please I need help

You need what is called a Firewall Traversal device.

It will have a port connected to your DMZ and another to your LAN and on to your MCU. This will allow the secure H.323 traffic from your Internet address to your multipoint controller (MCU) for your Video Conferencing equipment. They will often extend the number of multipoint licenses as well. I do not know what equipment you use but I do know that Radvision (http://www.radvision.com/), Tandberg (http://www.tandberg.com/) and PolyComm (http://www.polycomm.com/) each offer a Firewall Traversal device.