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    <tt>Hi Dragomir,<br>
      <br>
      I guess you Topo Hiding on OpenSIPS (I see only one VIA in the BYE
      sent out by OpenSIPS to the SBC) ?<br>
      <br>
      Anyhow, I see nothing wrong with the BYE sent by OpenSIPS. Do you
      have access to the logs/traces on the SBC ?<br>
      <br>
      Regards,<br>
    </tt>
    <pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
  OpenSIPS Founder and Developer
  <a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a>
</pre>
    <div class="moz-cite-prefix">On 10/16/2017 10:46 PM, Dragomir
      Haralambiev wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CADzurOKpQ3y7qQ+hS_Fdd9QeXP0qJvNs-dgMEP=KZVwhywY=RA@mail.gmail.com">
      <div dir="ltr">Hello,
        <div><br>
        </div>
        <div>I use Opensips 2.3 in follow scheme:</div>
        <div><br>
        </div>
        <div>SBC -------Opensips ------Zoiper</div>
        <div><br>
        </div>
        <div>When Opensips Send BYE to SBC, SBC not return 200 OK.<br>
          <br>
          Zoiper send BYE to Opensips. </div>
        <div><br>
        </div>
        <div>
          <div>    BYE <a class="moz-txt-link-freetext" href="sip:Opensips_IP:Opensips_port;did=363.27c9faa4">sip:Opensips_IP:Opensips_port;did=363.27c9faa4</a>
            SIP/2.0</div>
          <div>    Via: SIP/2.0/UDP
            Zoiper_IP:32346;branch=z9hG4bK-524287-1---fed42b1d179cd7b0;rport</div>
          <div>    Max-Forwards: 70</div>
          <div>    Contact:
            <a class="moz-txt-link-rfc2396E" href="sip:555222@Zoiper_IP:32346;transport=UDP"><sip:555222@Zoiper_IP:32346;transport=UDP></a></div>
          <div>    To:
<a class="moz-txt-link-rfc2396E" href="sip:555300@SBC_IP;user=phone"><sip:555300@SBC_IP;user=phone></a>;tag=ff435000ff02ff10ff00000c2916ffff</div>
          <div>    From:
            <a class="moz-txt-link-rfc2396E" href="sip:555222@Opensips_IP:Opensips_port;user=phone"><sip:555222@Opensips_IP:Opensips_port;user=phone></a>;tag=fc281b10</div>
          <div>    Call-ID: <a
              href="mailto:90425000ee02e5108000000c2916c1ef@sbc.site.com"
              moz-do-not-send="true">90425000ee02e5108000000c2916c1ef@sbc.site.com</a></div>
          <div>    CSeq: 2 BYE</div>
          <div>    User-Agent: Z 5.1.7 rv2.8.51</div>
          <div>    Content-Length: 0</div>
        </div>
        <div><br>
        </div>
        <div>Opensips send BYE to SBC.</div>
        <div><br>
        </div>
        <div>
          <div>    BYE <a class="moz-txt-link-freetext" href="sip:555300@SBC_IP;user=phone">sip:555300@SBC_IP;user=phone</a> SIP/2.0</div>
          <div>    Via: SIP/2.0/UDP
            Opensips_IP:Opensips_port;branch=z9hG4bK7931.161e4d25.0</div>
          <div>    Max-Forwards: 69</div>
          <div>    Contact:
            <a class="moz-txt-link-rfc2396E" href="sip:Opensips_IP:Opensips_port;did=363.27c9faa4"><sip:Opensips_IP:Opensips_port;did=363.27c9faa4></a></div>
          <div>    To:
<a class="moz-txt-link-rfc2396E" href="sip:555300@SBC_IP;user=phone"><sip:555300@SBC_IP;user=phone></a>;tag=ff435000ff02ff10ff00000c2916ffff</div>
          <div>    From:
            <a class="moz-txt-link-rfc2396E" href="sip:555222@Opensips_IP:Opensips_port;user=phone"><sip:555222@Opensips_IP:Opensips_port;user=phone></a>;tag=fc281b10</div>
          <div>    Call-ID: <a
              href="mailto:90425000ee02e5108000000c2916c1ef@sbc.site.com"
              moz-do-not-send="true">90425000ee02e5108000000c2916c1ef@sbc.site.com</a></div>
          <div>    CSeq: 2 BYE</div>
          <div>    User-Agent: Z 5.1.7 rv2.8.51</div>
          <div>    Content-Length: 0</div>
          <div><br>
          </div>
          SBC have not return 200 OK.</div>
        <div><br>
        </div>
        <div>How to setup Opensips to improve this problem?</div>
        <div><br>
        </div>
        <div>Best regards,</div>
        <div>Dragomir</div>
        <div> </div>
      </div>
      <br>
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      <br>
      <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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