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Thread: RTP UDP port negotiation - expected behavior

  1. #1

    Default RTP UDP port negotiation - expected behavior

    Wowza Media Server 3 Perpetual Edition 3.6.2.17 build7663

    What is the expected behavior of the UDP ports negotiated by RTSP?

    We are sending live streams to Wowza from mobile devices via RTSP/UDP and have noticed the server giving out pairs of ports for each SETUP but continuing on to 10000-10001 once it reaches what I thought was the upper limit of 9999.

    Should the server cycle back to the beginning of what is in DatagramStartingPort or continue past 9999 as we are observing?

    <DatagramStartingPort>6970</DatagramStartingPort>
    In our case we changed it to 9992

    <DatagramStartingPort>9992</DatagramStartingPort>
    Here is the response we got after sending the SETUP:

    RTSP/1.0 200 OK
    Date: Wed, 23 Oct 2013 12:20:52 PDT
    Transport: RTP/AVP/UDP;unicast;client_port=5000-5001;mode=receive;source=0.0.0.0;server_port=10000-10001
    Session: 1254165248;timeout=60
    Expires: Wed, 23 Oct 2013 12:20:52 PDT
    Cseq: 4
    Server: Wowza Media Server 3.6.2.17 build7739
    Cache-Control: no-cache
    We need to understand the behavior in order to open our firewall to the correct range. Currently it's open from UDP 9992 to 9999 only.

    Thanks,
    Robert

  2. #2
    Join Date
    Jul 2012
    Posts
    299

    Default

    This issue has been submitted in ticket #70684.

    -Tim
    Last edited by tim_d; 10-24-2013 at 09:06 PM.

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