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<tt>Hi Rodrigo,<br>
<br>
I feel there might be a confusion somewhere here. what is behind
the NAT ? your opensips ? or the end point ?<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 08.01.2016 13:20, Rodrigo Pimenta
Carvalho wrote:<br>
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<p>Hi Bogdan.</p>
<p><br>
</p>
<p>Thank you very much for the hint! I got more another
explanations here too and I was able to conclude the
following:</p>
<p><br>
</p>
<p><tt>To be sure the traffic sent out by opensips has the
public IP and not the local private one, I will set a stun
server in the softphone behind the NAT. In this case, such
softphone will send SIP messages (that has Contact header
field) already considering the public IP. I guess this
solution will be enough for my case.</tt></p>
<p><tt><br>
</tt></p>
<p><tt>I can't set <tt>advertise_address</tt> and <tt>advertise_port</tt>,
because my project will have lots of copies, to be installed
in lots of homes. In every home, there will be a different
public IP (and another private too).</tt></p>
<p><br>
</p>
<p><tt>Today I will configure a NAT device, put it in my
network, bind the proxy and sofphone to behind it and
execute some tests.</tt></p>
<p><br>
</p>
<p><tt>Best regards.</tt></p>
<p><br>
</p>
<p><br>
</p>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>De:</b>
Bogdan-Andrei Iancu <a class="moz-txt-link-rfc2396E" href="mailto:bogdan@opensips.org"><bogdan@opensips.org></a><br>
<b>Enviado:</b> quinta-feira, 7 de janeiro de 2016 12:43<br>
<b>Para:</b> OpenSIPS users mailling list; Rodrigo Pimenta
Carvalho<br>
<b>Assunto:</b> Re: [OpenSIPS-Users] Is
fix_nated_contact() useful when proxy and callee is behind
NAT?</font>
<div> </div>
</div>
<div><tt>Hi Rodrigo,<br>
<br>
If opensips is behind NAT, you should not use the nat
related modules (as the incoming traffic is correct from
nat perspective, as originating from public network). What
you need to do is to be sure the traffic sent out by
opensips has the public IP and not the local private one.
For this, look at :<br>
advertise_address<br>
advertise_port<br>
(<a moz-do-not-send="true" title="Ctrl+Clique ou toque
para seguir o link" id="LPlnk670445"
class="moz-txt-link-freetext"
href="http://www.opensips.org/Documentation/Script-CoreParameters-2-1#toc25">http://www.opensips.org/Documentation/Script-CoreParameters-2-1#toc25</a>)
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href="http://www.opensips.org/Documentation/Script-CoreParameters-2-1#toc25"
style="text-decoration: none;"
id="LPUrlAnchor_14521855617210.8282630275036953">openSIPS
| Documentation / Core Parameters - 2.1</a></div>
<div style="margin: 10px 0px 16px; color:
rgb(102, 102, 102); font-weight: 400;
font-family:
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overflow: hidden;"
id="LPDescription_14521855617210.15241080238277693">
This section lists the all the parameters
exported by OpenSIPS core for script usage (to
be used in opensips.cfg) This document is for
OpenSIPS 1.12.x</div>
</td>
</tr>
</tbody>
</table>
</div>
<br>
<br>
And be sure you have do port fwd of the SIP port from the
public address of the NAT to the private IP of your
opensips.<br>
<br>
Regards,<br>
</tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a moz-do-not-send="true" title="Ctrl+Clique ou toque para seguir o link" class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 07.01.2016 13:30, Rodrigo
Pimenta Carvalho wrote:<br>
</div>
<blockquote type="cite">
<div id="divtagdefaultwrapper" style="font-size:12pt;
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font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Hi.</p>
<p><br>
</p>
<p>I have read the entire OpenSIPS' documentation about
how to deal with NATs.</p>
<p>I found ways of dealing with messages from client
that is behind NAT. OpenSIPS can fix Contact headers
fields and registers, when SIP messages comes from
clients and cross NATs before reaching this proxy.</p>
<p><br>
</p>
<p>However, my OpenSIPS and callee is behind NAT, not
the client. That is, if a client (caller) calls the
callee, how could OpenSIPS with its functions fixes
Contact header fields in responses that go from callee
to caller, so that the client will be able to send
ACKs? It is still obscure to me.</p>
<p><br>
</p>
<p>Any idea?</p>
<p><br>
</p>
<p>Best regards.<br>
</p>
<p><br>
</p>
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