<div dir="ltr">Hi,<div>Thanks for your response. <br></div><div><br></div><div>I've added the network trace <a href="https://pastebin.com/raw/Lxi0SRZ4">here</a>. I've masked some of the IPs for security.</div><div><a href="https://pastebin.com/raw/rCLdemG4">This</a> is what the ACK looks like from the OpenSIPs server. Please let me know if I need to share more information.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Nov 15, 2023 at 5:05 PM Bogdan-Andrei Iancu <<a href="mailto:bogdan@opensips.org">bogdan@opensips.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
  
    
  
  <div>
    <font face="monospace">Hi,<br>
      <br>
      Ideally you should provide a network capture (pcap) from the
      OpenSIPS server, covering both incoming and outgoing traffic -
      this is the only way to understand what is wrong with the call.<br>
      <br>
      As attachments are limited to 40K here, consider using some
      pastebin or other file sharing service.<br>
      <br>
      Regards,<br>
    </font>
    <pre cols="72">Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
  <a href="https://www.opensips-solutions.com" target="_blank">https://www.opensips-solutions.com</a>
  <a href="https://www.siphub.com" target="_blank">https://www.siphub.com</a></pre>
    <div>On 11/13/23 1:26 PM, Sreeram Narayanan
      via Users wrote:<br>
    </div>
    <blockquote type="cite">
      
      <div dir="ltr">Hello,
        <div><br>
        </div>
        <div>I am trying to use OpenSIPs with the load_balancer module
          to balance inbound calls between 2 Asterisk servers. The setup
          sits behind a NAT. The OpenSIPs server has a public IP and a
          private IP. When an INVITE arrives, it can forward it to one
          of the Asterisk servers and Asterisk responds with a 200 OK.
          The problem starts when I receive the ACK (from Twilio). The
          ACK starts bouncing between the public IP and Private IP of
          the OpenSIPs server. It doesn't reach the Asterisk server and
          eventually times out. I hope someone can help me with this.
          Thanks in advance.</div>
        <div><br>
        </div>
        <div>Here is my configuration:</div>
        <div><br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">#######
          Routing Logic ########<br>
          route {<br>
          <br>
              if (is_method("INVITE")) {<br>
                  rtpproxy_engage();<br>
              }<br>
          <br>
              if ($rm=="INVITE") {<br>
          <br>
                  lb_start_or_next(1,"pstn");<br>
              }<br>
          <br>
              t_check_trans();<br>
              record_route();<br>
          <br>
              t_on_failure("GW_FAILOVER");<br>
          <br>
              # route the request<br>
              if (!t_relay()) {<br>
                  sl_reply_error();<br>
              }<br>
          <br>
              exit;<br>
          }<br>
          <br>
          route[RELAY] {<br>
              if (!t_relay()) {<br>
                  sl_reply_error();<br>
              }<br>
              exit;<br>
          }<br>
          <br>
          failure_route[GW_FAILOVER] {<br>
              if (t_was_cancelled()) {<br>
                  exit;<br>
              }<br>
              # failure detection with redirect to next available trunk<br>
              if (t_check_status("(408)|([56][0-9][0-9])")) {<br>
                  xlog("Failed trunk $rd/$du detected \n");<br>
              }<br>
          }<br>
        </blockquote>
        <div>
          <div><br>
          </div>
          <span class="gmail_signature_prefix">-- </span><br>
          <div dir="ltr" class="gmail_signature">
            <div dir="ltr">- Sreeram</div>
          </div>
        </div>
      </div>
      <br>
      <fieldset></fieldset>
      <pre>_______________________________________________
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</pre>
    </blockquote>
    <br>
  </div>

</blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">- Sreeram</div></div>