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Solved Proxy authentication required

Discussion in '3CX Phone System - General' started by THCO, Oct 20, 2017.

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  1. THCO

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    Hi All,

    I have a local pbx with local ip phones. Everything is working correctly and I am currently having no issues. I was playing with the new capture tool and looking at the pcap files using wireshark.

    I have noticed that I am getting a 407 - Proxy authentication required originating from my 3cx server to each extension that is making a call.

    Is this something I need to worry about or just let it go. The pbx has been online for more than 6 + months and I have not had any issues.
     
  2. Panayiotis_3CX

    Panayiotis_3CX Support Team
    Staff Member 3CX Support

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    Hello @THCO,

    The "407 Proxy Authentication Required" SIP message is sent from the PBX to the phone, to obtain authentication from the user.
    You can find more info on SIP messages here >> https://www.3cx.com/pbx/sip-responses/
     
  3. THCO

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    Is this something I need to worry about as I am not seeing any issues at the moment.

    Also how do I resolve it?
     
  4. Panayiotis_3CX

    Panayiotis_3CX Support Team
    Staff Member 3CX Support

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    @THCO,

    No this is not something that should be worrying you.

    When a phone makes a call, after the initial invite to the PBX, the PBX will always reply to the phone with a "407 Proxy Authentication required" message. The phone sends an "ACK" message and authenticates.

    Check the below capture of a call from an extension to another. This is the normal flow of a SIP call.
     

    Attached Files:

  5. THCO

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    I see now what you are saying. Thank you so much for answering that for me.

    This is why I chose 3cx as a voip solution because this forum is amazing.
     
    YiannisH_3CX and Panayiotis_3CX like this.
  6. Panayiotis_3CX

    Panayiotis_3CX Support Team
    Staff Member 3CX Support

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    Glad we could clarify this for you.
    Thank you for your feedback, it is greatly appreciated :)
     
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