ITSP requires Invite via header to have a public IP- How To?

Discussion in '3CX Phone System - General' started by helia, Jun 21, 2017.

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  1. helia

    Nov 1, 2016
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    We're having an issue with some calls not completing based on how an end carrier transfers calls using a re-invite. I'm told that the via header in the invite must have a public ip.

    Here is an invite fragment from a call initiating from 3CX Phone on ver 15.5

    20 Jun 18:03:10.641/GLOBAL/ser[78068]: RECEIVED message from
    INVITE sip:14168004747@ SIP/2.0
    Via: SIP/2.0/UDP;branch=z9hG4bK-524287-1---aa2a8d3c8d523877;rport
    Max-Forwards: 70
    Contact: <sip:helia@>
    To: <sip:14168004747@>
    From: "4037751490"<sip:4037751490@>;tag=c906bb2a

    The is the internal IP of 3CX.

    How can I get this via header to show the static public ip address of 3cx instead of the private ip address?
  2. cobaltit

    cobaltit Active Member

    Mar 22, 2012
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    This would be the 'Options' tab of your SIP trunk....
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    YiannisH_3CX likes this.
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