NAT problems...

Jorge Luis
  • Jorge Luis

    Jorge Luis - 2011-03-07

    Hi all,
    I have a simple scenario with the follow problem:

    A OpenSIPS server with public address
    A pair UAC behind NAT, A ->  and  B ->
    NAT public address ->

    If i try to call from A to B using Mediaproxy no problem.
    But if no use Mediaproxy there is not dialog, no hear nothing.

    When parse the sip traffic can see that both UAC are sending RTP to
    Further in the contact column on the location table, we can see:
    sip:A@   and  sip:B@

    when i think that would must be:  A@  and  B@
    or no? What's happening?

    Very Thanks.
    Jorge Luis.

  • Jorge Luis

    Jorge Luis - 2011-03-10

    Hi all,

    I checked that some gateways rewrite the Contact field of SIP Message Header. This can be parsed by SER to order divert RTP for Mediaproxy.

    Thanks, bye


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