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    <tt>Hi, Rodrigo!<br>
      <br>
      Make sure you are calling the fix_nated_contact() function on 200
      OK, otherwise OpenSIPS might try to send the ACK to whatever bogus
      IP the client sets in the Contact header.<br>
      <br>
      Best regards,<br>
    </tt>
    <pre class="moz-signature" cols="72">Răzvan Crainea
OpenSIPS Developer
<a class="moz-txt-link-abbreviated" href="http://www.opensips-solutions.com">www.opensips-solutions.com</a></pre>
    <div class="moz-cite-prefix">On 10/05/2017 03:12 PM, Rodrigo Pimenta
      Carvalho wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CY4PR02MB232592D38952DD6526CCC5BAB5700@CY4PR02MB2325.namprd02.prod.outlook.com">
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        <p>Dear OpenSIPS users,</p>
        <p><br>
        </p>
        <p>According to the OpenSIPS log, a callee answered a caller
          with SIP OK.</p>
        <p>Such SIP OK has the following contact:</p>
        <p><br>
        </p>
        <p><span>                  Contact: "Group"
            <a class="moz-txt-link-rfc2396E" href="mailto:sip:g1r2u3p4o5@127.0.0.1:40348;transport=TLS;ob"><sip:g1r2u3p4o5@127.0.0.1:40348;transport=TLS;ob></a>;+sip.ice</span><br>
        </p>
        <p><br>
        </p>
        <p>However, it seems that there is no available connection to
          port 40348. That is, opensips cann't send any message to that
          port.</p>
        <p>So, after opensips relaying a SIP ACK to <span>g1r2u3p4o5</span>,
          it caused the following error:</p>
        <p><br>
        </p>
        <div>Jan 09 17:48:54 colibri-imx6 opensips[23115]: Jan  9
          17:48:54 [23135] <a class="moz-txt-link-freetext" href="INFO:core:probe_max_sock_buff">INFO:core:probe_max_sock_buff</a>: using snd
          buffer of 320 kb<br>
          Jan 09 17:48:54 colibri-imx6 opensips[23115]: Jan  9 17:48:54
          [23135] <a class="moz-txt-link-freetext" href="INFO:core:init_sock_keepalive">INFO:core:init_sock_keepalive</a>: TCP keepalive enabled
          on socket 22<br>
          Jan 09 17:48:54 colibri-imx6 opensips[23115]: Jan  9 17:48:54
          [23135] ERROR:core:tcp_connect_blocking: poll error: flags 28
          - 4 8 16 32<br>
          Jan 09 17:48:55 colibri-imx6 opensips[23115]: Jan  9 17:48:54
          [23135] ERROR:core:tcp_connect_blocking: failed to retrieve
          SO_ERROR [server=127.0.0.1:40348] (111) Connection refused<br>
          Jan 09 17:48:55 colibri-imx6 opensips[23115]: Jan  9 17:48:54
          [23135] ERROR:proto_tls:tls_sync_connect: tcp_blocking_connect
          failed<br>
          Jan 09 17:48:55 colibri-imx6 opensips[23115]: Jan  9 17:48:54
          [23135] ERROR:proto_tls:proto_tls_send: connect failed<br>
          Jan 09 17:48:55 colibri-imx6 opensips[23115]: Jan  9 17:48:54
          [23135] ERROR:core:msg_send: send() for proto 3 failed<br>
        </div>
        <p><br>
        </p>
        <p>What is happening here?</p>
        <p>How can a peer lost its connection or lost connect to
          opensips?</p>
        <p>How to avoid this issue or recover from it?</p>
        <p><br>
        </p>
        <p>I have no idea on what to do. Any hint will be very helpful!</p>
        <p><br>
        </p>
        <p>Thanks a lot.<br>
        </p>
        <p><br>
        </p>
        <p><br>
        </p>
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                <div class="PlainText">RODRIGO PIMENTA CARVALHO<br>
                  Inatel Competence Center<br>
                  Software<br>
                  Ph: +55 35 3471 9200 RAMAL 979<br>
                </div>
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      <pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a>
<a class="moz-txt-link-freetext" href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a>
</pre>
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