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    <tt>Sure, let me know if you have any questions.<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 04.08.2015 20:22, Rodrigo Pimenta
      Carvalho wrote:<br>
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      <p>Thank you Bogdan.</p>
      <p><br>
      </p>
      <p>Let' me read more about these things and try to summarize the
        all new gotten knowledge in a script code written by myself, as
        simple as possible.</p>
      <p>Maybe I will put some new question here tomorrow.</p>
      <p>Best regards.</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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        <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
            color="#000000" face="Calibri, sans-serif"><b>De:</b>
            Bogdan-Andrei Iancu <a class="moz-txt-link-rfc2396E" href="mailto:bogdan@opensips.org">&lt;bogdan@opensips.org&gt;</a><br>
            <b>Enviado:</b> terça-feira, 4 de agosto de 2015 13:39<br>
            <b>Para:</b> Rodrigo Pimenta Carvalho;
            <a class="moz-txt-link-abbreviated" href="mailto:users@lists.opensips.org">users@lists.opensips.org</a><br>
            <b>Assunto:</b> Re: [OpenSIPS-Users] Minimal example of NAT
            traversing. How could it be done? No need for MediaProxy at
            first glance.</font>
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        <div><tt>Rodrigo,<br>
            <br>
            In OpenSIPS you have 2 type of NAT modules:<br>
            - for NAT detection, mangling SIP signaling and for doing
            the NAT keepalive: you have here the NAT_traversal and
            nathelper, 2 similar modules as capabilities;<br>
            - for media relay - modules that interact with an external
            media relay for RTP; and here you have again 2 modules, the
            mediaproxy and rtpproxy.<br>
            <br>
            Regards,<br>
          </tt>
          <pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
          <div class="moz-cite-prefix">On 04.08.2015 16:51, Rodrigo
            Pimenta Carvalho wrote:<br>
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            <p>Hi Bogdan,</p>
            <p><br>
            </p>
            <p>Thank you. Very well remembered!</p>
            <p><br>
            </p>
            <p>Let me ask you conceptual question, please:</p>
            <p><br>
            </p>
            <p>When should I use MediaProxy, not being necessary to use
              NAT_TRAVERSAL and NATHELPER?</p>
            <p><br>
            </p>
            <p>When should I use NAT_TRAVERSAL, no being necessary to
              use MediaProxy and NATHELPER?</p>
            <p><br>
            </p>
            <p>When should I use NATHELPER, not being necesary to use
              MediaProxy and NAT_TRAVERSAL?</p>
            <p><br>
            </p>
            <p>When should I use some kind of mix of these 3?</p>
            <p><br>
            </p>
            <p>Best regards. <br>
            </p>
            <p><br>
            </p>
            <p><br>
            </p>
            <p> <br>
            </p>
            <p><br>
            </p>
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                <div class="BodyFragment"><font size="2">
                    <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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              <div id="divRplyFwdMsg" dir="ltr"><font
                  style="font-size:11pt" color="#000000" face="Calibri,
                  sans-serif"><b>De:</b> Bogdan-Andrei Iancu
                  <a moz-do-not-send="true"
                    class="moz-txt-link-rfc2396E"
                    href="mailto:bogdan@opensips.org">&lt;bogdan@opensips.org&gt;</a><br>
                  <b>Enviado:</b> terça-feira, 4 de agosto de 2015 09:21<br>
                  <b>Para:</b> OpenSIPS users mailling list; Rodrigo
                  Pimenta Carvalho<br>
                  <b>Assunto:</b> Re: [OpenSIPS-Users] Minimal example
                  of NAT traversing. How could it be done? No need for
                  MediaProxy at first glance.</font>
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              <div><tt>Hi Rodrigo,<br>
                  <br>
                  User "make menuconfig" in order to auto-generate
                  scripts - the residential script has an options for
                  NAT support.<br>
                  <br>
                  Regards,<br>
                </tt>
                <pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
                <div class="moz-cite-prefix">On 04.08.2015 00:00,
                  Rodrigo Pimenta Carvalho wrote:<br>
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                  <p>Dear OpenSIPS-users,</p>
                  <p><br>
                  </p>
                  <p>I'm studying about NAT traversal with OpenSIPS,
                    since last week. I also have found the documentation
                    about the software MediaProxy (in
                    <a moz-do-not-send="true"
                      href="http://mediaproxy.ag-projects.com/">http://mediaproxy.ag-projects.com/</a>).</p>
                  <p><br>
                  </p>
                  <p>As long as I'm still getting 'kind of first steps'
                    knowledge base about NAT traversal, I'm not
                    interested, at least for a while,
                    in MediaProxy software functionalities.</p>
                  <p>By the way, as a first contact with the NAT
                    traversal mechanism, I just would like to let
                    the INVITE from a caller reaches the callee,
                    with caller behind a NAT. For this purpose I have 2
                    questions:</p>
                  <p><br>
                  </p>
                  <p>a) Am I free of using a kind of mediaproxy
                    software, whether I want to build a prototype schema
                    that will just creates and sends an simple INVITE,
                    from caller behind a NAT, to a callee? That is, if I
                    want just to run a simple test of NAT traversal, I
                    don't have to worry about mediaproxies, have I?</p>
                  <p><br>
                  </p>
                  <p>b) How could be an example of a simplest script
                    code for that, considering that there is only one
                    proxy for all peers and all of it is registered in
                    such proxy using the same domain?</p>
                  <p><br>
                  </p>
                  <p>Any hint will be very helpful!!</p>
                  <p>Thanks a lot. <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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