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  1. #1
    Registered User
    Join Date
    Apr 2007

    VIA header not being correctly set


    Recently got a Nokia E65 phone. I have VoIP working perfectly with it with a number of Sip Servers.

    I am attempting to get the E65 to register to a Lucent/Alcatel IMS. The E65 is being NAT'd router, and succesfully detects its external IP. I can see this in the Contact/SDP info in the initial Invite.

    It is however incorrectly (from what I understand of the VIA header) setting the VIA header.

    The E65s External IP & Port after NAT is:

    The E65s Internal IP & Port

    Reading the RFCs - the VIA header on a Register should look like:

    Via: SIP/2.0/UDP Z:48380;rport;branch=...

    It doesn't however. Looking at the REGISTER request, it has:

    Via: SIP/2.0/UDP;branch=z9hG4bK7ksvl47qi0jvnnao94mqbab;rport

    Is this correct?

    I've looked at the REGISTER requests from a couple of other phones, and they all set the Via header correctly after doing with a NAT? Or is there an option to not include the VIA option in there?

    User Datagram Protocol, Src Port: 48374 (48374), Dst Port: sip (5060)
    Session Initiation Protocol
    Request-Line: REGISTER sip:sip.X.Y SIP/2.0
    Message Header
    Via: SIP/2.0/UDP;branch=z9hG4bK7ksvl47qi0jvnnao94mqbab;rport
    From: <sip:+X@sip.X.Y>;tag=k07kibbp69hc7g560dub
    To: <sip:+X@sip.X.Y>
    Contact: <sip:+X@Z:48374>;expires=3600
    CSeq: 1319 REGISTER
    Call-ID: -GJ9bu0loIcnTMdYk3e9hcQbZzQIBa
    Supported: sec-agree
    User-Agent: Nokia RM-208 1.0633.18.01
    Max-Forwards: 70
    Content-Length: 0
    sean@Sean ~ %
    Last edited by seanwg; 2007-04-22 at 14:13.

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