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    <p>It is not about an external network interface, but external
      traffic/devices. The NAT in this case is a port forwarding
      firewall, like Amazon or Google cloud, where you have a local
      address on server and the firewall is forwarding by port all
      traffic from an assigned public address.</p>
    <p>Such scenario is quite common in enterprise environment, the
      devices on local network connect by private IP, and the external
      devices connect to the firewall ip and this one does port
      forwarding.</p>
    <p>Cheers,<br>
      Daniel<br>
    </p>
    <div class="moz-cite-prefix">On 05.12.18 16:56, Sergiu Pojoga wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAJZsGCmy_+kZAgdJhD=05j1XSh2wOexVDh34MQmdrpb87ykv=g@mail.gmail.com">
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      <div dir="ltr">Slightly confused here... didn't he say that
        Kamailio and PBX are behind NAT? If so, what external interface
        are we talking about?</div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr">On Wed, Dec 5, 2018 at 9:18 AM Daniel-Constantin
          Mierla <<a href="mailto:miconda@gmail.com"
            moz-do-not-send="true">miconda@gmail.com</a>> wrote:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0
          .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
          <br>
          you do not need a second kamailio, the same instance can
          listen on<br>
          multiple sockets. You can also use a single ip, just listen on
          one port<br>
          for traffic from local network and on another port for
          external traffic<br>
          (this socket with advertise address).<br>
          <br>
          If the router cannot handle dns query based on local traffic,
          most<br>
          devices support so called outbound proxy address, you can set
          that to<br>
          the sip server address with ip.<br>
          <br>
          Cheers,<br>
          Daniel<br>
          <br>
          On 05.12.18 13:02, Kjeld Flarup wrote:<br>
          > That might work, provided that the router can handle a
          local DNS.<br>
          ><br>
          > It would, however still require adding an extra Kamailio
          instance with<br>
          > another IP. Plus a branch of the invite to both local and
          public<br>
          > instance. Plus an extra location table.<br>
          ><br>
          > -------------------- Med Liberalistiske Hilsner
          ----------------------<br>
          >    Civilingeniør, Kjeld Flarup - Mit sind er mere åbent
          end min tegnebog<br>
          >    Sofienlundvej 6B, 7560 Hjerm, Tlf: 40 29 41 49<br>
          >    Den ikke akademiske hjemmeside for liberalismen - <a
            href="http://www.liberalismen.dk" rel="noreferrer"
            target="_blank" moz-do-not-send="true">www.liberalismen.dk</a><br>
          ><br>
          > On 12/5/18 12:11 PM, Daniel Tryba wrote:<br>
          >> On Wed, Dec 05, 2018 at 09:40:38AM +0100, Kjeld
          Flarup wrote:<br>
          >>> Yes, the Phones may be on either local LAN (Wifi)
          and Internet via<br>
          >>> mobile<br>
          >>> data.<br>
          >> How about use different local address, 1 with an
          advertise for external<br>
          >> clients, 1 without. Have local DNS resolv to the 1 ip
          without advertise.<br>
          >><br>
          >> _______________________________________________<br>
          >> Kamailio (SER) - Users Mailing List<br>
          >> <a href="mailto:sr-users@lists.kamailio.org"
            target="_blank" moz-do-not-send="true">sr-users@lists.kamailio.org</a><br>
          >> <a
            href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users"
            rel="noreferrer" target="_blank" moz-do-not-send="true">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a><br>
          ><br>
          > _______________________________________________<br>
          > Kamailio (SER) - Users Mailing List<br>
          > <a href="mailto:sr-users@lists.kamailio.org"
            target="_blank" moz-do-not-send="true">sr-users@lists.kamailio.org</a><br>
          > <a
            href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users"
            rel="noreferrer" target="_blank" moz-do-not-send="true">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a><br>
          <br>
          -- <br>
          Daniel-Constantin Mierla -- <a href="http://www.asipto.com"
            rel="noreferrer" target="_blank" moz-do-not-send="true">www.asipto.com</a><br>
          <a href="http://www.twitter.com/miconda" rel="noreferrer"
            target="_blank" moz-do-not-send="true">www.twitter.com/miconda</a>
          -- <a href="http://www.linkedin.com/in/miconda"
            rel="noreferrer" target="_blank" moz-do-not-send="true">www.linkedin.com/in/miconda</a><br>
          Kamailio World Conference -- <a
            href="http://www.kamailioworld.com" rel="noreferrer"
            target="_blank" moz-do-not-send="true">www.kamailioworld.com</a><br>
          Kamailio Advanced Training, Nov 12-14, 2018, in Berlin -- <a
            href="http://www.asipto.com" rel="noreferrer"
            target="_blank" moz-do-not-send="true">www.asipto.com</a><br>
          <br>
          <br>
          _______________________________________________<br>
          Kamailio (SER) - Users Mailing List<br>
          <a href="mailto:sr-users@lists.kamailio.org" target="_blank"
            moz-do-not-send="true">sr-users@lists.kamailio.org</a><br>
          <a
            href="https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users"
            rel="noreferrer" target="_blank" moz-do-not-send="true">https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users</a><br>
        </blockquote>
      </div>
    </blockquote>
    <pre class="moz-signature" cols="72">-- 
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Kamailio World Conference -- <a class="moz-txt-link-abbreviated" href="http://www.kamailioworld.com">www.kamailioworld.com</a>
Kamailio Advanced Training, Nov 12-14, 2018, in Berlin -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a></pre>
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