OCS + NAT RRS feed

  • Question

  • hello
    Is it possible to establish connection between two communicators (one is behind the NAT) ?
    I don't have Edge server. But it works in 95%. How is it possible?

    Sunday, September 7, 2008 7:34 PM

All replies

  • Connections between two communicator clients will be working in some cases and is peer to peer. Once you start a video conference via Communicator or Live meeting the video streams will be broadcasted from the MCU on the web conferencing server. If the clients are behind NAT A/V conferencing will not work without an Edge Server. The Edge Server supports STUN/ICE which is required to route audio/video streams to clients that are behind firewall via NAT.

    Sunday, September 7, 2008 8:38 PM
  • I have OCS server  (, client computer  ( other client computer ( - behind the NAT)

    it look like :

    | ocs server|  --------  | Client 1  |  --------------- | NAT| ------------|client 2|

    A/V conferencing works  without Edge server !  (Sometime it is impossible to establish connection, but generally it works i )
    I don't know how !


    Sunday, September 7, 2008 10:10 PM

    Have you also tried if a/v works with more then two (Communicator and Live Meeting) clients in a session?



    Monday, September 8, 2008 11:30 AM
  • yes, I have, but it works

    now I have something which looks like this:

    | OCS  |   ------------  | (     NAT 1  (   |  --------| client 1 ( |
    \__________| ( NAT 2 ( | -------| client 2 (|
    \___ |client 3 (|

    now client 3 can establish connection with client 1 and client 2 (not always but generally can  )
    client 1 and client 2 can't communicate a/v
    Where do I have connect Edge server? Just in network ?


    Monday, September 8, 2008 6:59 PM
  • It's possible because you are port-forwarding traffic through the firewall to the internal Front-End server.  This configuration is not supported or recommended for mulitple security reasons, hence why the Edge role was defined and created in the first place.  And using NAT on the A/V role will still function, just not 100%, which is what you seem to be seeing.




    Monday, September 8, 2008 7:38 PM
  • The (new) Edge Planning tool can help you to answer the question where to put the Edge Server in your network. The tool also provides links to the OCS/Edge documentation.





    Tuesday, September 9, 2008 6:35 AM
  • thank you for replay, and what is the best configuration for testing OCS + NAT I'd like to make lab for testing how A/V Edge server works. Do I need something like this :   client1  -  edge server - ocs 2007 - client 2 ? Where do I have to "put" NAT ?

    Thursday, September 11, 2008 12:30 PM