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WHY OCS CAN'T SUPPORT SIP LISTENING on UDP 5060?WHY RRS feed

  • Question

  • WHY OCS CAN'T SUPPORT SIP LISTENING on UDP 5060?WHY

     

    Friday, June 15, 2007 3:50 AM

Answers

  • For security and networking reasons.  The below quote written by Jeremy Bush (MSFT) on the microsoft.public.livecomm.general group is the best quick explanation that I've seen on this topic.

     

    "UDP is not valuable on the Internet where firewalls/NATs prevent
    non-connection-based protocols from traversing the network.  Additionally it
    does not provide enough session-level mechanics to prevent us from
    connecting back to random entities because we couldn't really verify who we
    were talking with in the first place if they happened to spoof messages."

    Friday, June 15, 2007 4:56 AM
    Moderator

All replies

  • For security and networking reasons.  The below quote written by Jeremy Bush (MSFT) on the microsoft.public.livecomm.general group is the best quick explanation that I've seen on this topic.

     

    "UDP is not valuable on the Internet where firewalls/NATs prevent
    non-connection-based protocols from traversing the network.  Additionally it
    does not provide enough session-level mechanics to prevent us from
    connecting back to random entities because we couldn't really verify who we
    were talking with in the first place if they happened to spoof messages."

    Friday, June 15, 2007 4:56 AM
    Moderator
  • YES,I Think so,But microsoft forget this fact:many VOIP Gateways only support UDP,why not  MS support UDP?

    may be MS think i'm  a big man,others are childrens. so.......

     

    Friday, June 15, 2007 6:29 AM
  • I agree that SIP over UDP would be nice as it would unlock more connectivity scenarios. But at the same time, the securtiy considerations, firewall considerations plus the lack of session controls make SIP over UDP less than wonderful. I suspect that MS is unlikely to ever support SIP over UDP.
    Friday, June 15, 2007 12:07 PM
  •  

    I think Mediation server support sip over udp is Necessary & important, because it will connect to VOIP gateway,

    and in that case,The security problem is basic nonexistent.

    Monday, June 18, 2007 3:14 AM