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    <p>Thanks everybody for help! The problem was in wrong listen
      address in kamailio.cfg. Alex Balashov, thanks a million for help!
      <br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 01.09.2017 20:04, Karsten Horsmann
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAFArqsZhy5uh3peLxvFvSD33RXbOHzT0wp3dULFwLK8FhhdK3w@mail.gmail.com">
      <div dir="ltr">Hi Mykyta,
        <div><br>
        </div>
        <div>since you are plain sip without encryption you can see your
          sip-traffic on the wire,</div>
        <div>use sngrep on the kamailio box to figure out whats with the
          sip-dialogs - it helps a lot.<br>
        </div>
        <div><a href="https://github.com/irontec/sngrep"
            moz-do-not-send="true">https://github.com/irontec/sngrep</a><br>
        </div>
        <div>and if its more an kamailio config problem, it would be
          better to stay at sr-users@.<br>
        </div>
        <div><br>
        </div>
        <div>Or you can setup an webhomer for debugging.</div>
        <div><br>
        </div>
        <div>Kind Regards</div>
        <div><br>
        </div>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">2017-09-01 17:49 GMT+02:00 Sean
            Ingham <span dir="ltr"><<a
                href="mailto:sean@missionlabs.co.uk" target="_blank"
                moz-do-not-send="true">sean@missionlabs.co.uk</a>></span>:<br>
            <blockquote class="gmail_quote" style="margin:0px 0px 0px
              0.8ex;border-left:1px solid
              rgb(204,204,204);padding-left:1ex">
              <div dir="ltr">Once a call is answered FreeSWITCH sends a
                200 OK SIP message to your Kamailio loadbalancer. As per
                the SIP spec your kamailio box should respond to a 200
                OK with an ACK. The FS logs show that it never receives
                an ACK, and it repeatedly tries sending the 200 OK with
                no response. After 30 seconds without an ACK FS will
                assume the call has failed and hangup.<br>
                <br>
                Looking at your Kamailio SIP logs you can see the 200
                OKs getting through okay, and no attempt to send an ACK
                back to FS. I think this indicates an issue with your
                kamailio.cfg rather than FreeSWITCH.<br>
                <div class="gmail_extra"><br>
                </div>
                <div class="gmail_extra"><br>
                </div>
                <div class="gmail_extra">Sean<br>
                  <a href="http://www.wirex-precision.co.uk"
                    target="_blank" moz-do-not-send="true">www.wirex-precision.co.uk</a><br>
                  <br>
                  <div class="gmail_quote">
                    <div>
                      <div class="gmail-h5">On Fri, Sep 1, 2017 at 3:40
                        PM, Микита Нікітенко <span dir="ltr"><<a
                            href="mailto:nikitanikitenko@gmail.com"
                            target="_blank" moz-do-not-send="true">nikitanikitenko@gmail.com</a>></span>
                        wrote:<br>
                      </div>
                    </div>
                    <blockquote class="gmail_quote" style="margin:0px
                      0px 0px 0.8ex;border-left:1px solid
                      rgb(204,204,204);padding-left:1ex">
                      <div>
                        <div class="gmail-h5">
                          <div dir="ltr">
                            <div class="gmail_quote"><br>
                              <div dir="ltr">Hello! I have server at
                                digital ocean with a floating ip address
                                and I have routed sip traffic to this
                                floating ip. At this server installed
                                kamailio which balancing between
                                freeswitch servers. I have a problem
                                that call drops after 32 seconds with
                                error ACK Timeout. Traffic comming
                                throug the kamailio proxy. 
                                <div><br>
                                </div>
                                <div>kamailio.cfg - <a
                                    href="https://pastebin.com/x0CL3TEZ"
                                    target="_blank"
                                    moz-do-not-send="true">https://pastebin.com/x0CL3TE<wbr>Z</a></div>
                                <div>kamailio sip messages log - <a
                                    href="https://pastebin.com/wyT3cBbD"
                                    target="_blank"
                                    moz-do-not-send="true">https://pastebin.com/wyT3cBb<wbr>D</a></div>
                                <div>freeswitch logs with sip debug - <a
                                    href="https://pastebin.com/zPysfQkV"
                                    target="_blank"
                                    moz-do-not-send="true">https://pastebin.com/zPysfQkV</a></div>
                                <div><br>
                                </div>
                                <div>I'm struggling for a week and have
                                  no idea how to fix it. </div>
                                <div>Thank you very much.</div>
                                <div>Mykyta Nikitenko</div>
                                <div><br>
                                </div>
                              </div>
                            </div>
                            <br>
                          </div>
                          <br>
                        </div>
                      </div>
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                  </div>
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          </div>
          <br>
          <br clear="all">
          <div><br>
          </div>
          -- <br>
          <div class="gmail_signature">Mit freundlichen Grüßen<br>
            *Karsten Horsmann*<br>
          </div>
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      <pre wrap="">_______________________________________________
Kamailio (SER) - Users Mailing List
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</pre>
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