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<p class=MsoNormal><span style='color:#1F497D'>Thank you</span><span
lang=EN-US style='color:#1F497D'>!<o:p></o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>
Bogdan-Andrei Iancu [mailto:bogdan@opensips.org] <br>
<b>Sent:</b> Friday, April 05, 2013 5:43 PM<br>
<b>To:</b> users@lists.opensips.org; a.gogichashvili@ptl.ru<br>
<b>Subject:</b> Re: [OpenSIPS-Users] Trouble with nat handling.<o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><tt><span style='font-size:10.0pt'>Hello,</span></tt><span
style='font-size:10.0pt;font-family:"Courier New"'><br>
<br>
<tt>Not clear from the diagram, but the UAC2 is behind the NAT, not OpenSIPS
and UAC1, right ?</tt><br>
<br>
<tt>As Laszlo suggested, you need a force_rport(), but not only for INVITE, but
for all requests coming from behind the NAT - like the BYE, in your case.</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre><pre>OpenSIPS Founder and Developer<o:p></o:p></pre><pre><a
href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre>
<p class=MsoNormal><br>
On 04/04/2013 05:29 PM, Гогичашвили Андрей wrote: <o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>Hello! I have some trouble with nat
handling.</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>I have such scheme:</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>uac1---opensips---(NAT)---uac2</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>I call to UAC2 and signaling establishment
is ok. When UAC2 sends BYE opensips translates 200OK (received from
UAC1) to the wrong port. </span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>BYE generated by UAC2 has such via header:</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>“Via: SIP/2.0/UDP
192.168.18.137:5060;branch=z9hG4bK8b517b11a415”</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>and the BYE comes from U 2013/04/04
17:21:50.287792 1.1.1.1:59292 -> 2.2.2.2:5068</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>Where 1.1.1.1 – nat, 2.2.2.2 -
opensips</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>Opensips adds one more via header to the
BYE:</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>Via: SIP/2.0/UDP
2.2.2.2;branch=z9hG4bK7f45.debc1592.0. </span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>and changes first via header by adding
received field:</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>Via: SIP/2.0/UDP
192.168.18.137:5060;received=1.1.1.1;branch=z9hG4bK8b517b11a415</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>200 OK got from UAC1 opensips tries to send
not to 1.1.1.1:59292 but to 1.1.1.1:5060</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>The question is how can we make opensips to
send 200 OK to 59292 port?</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US>Thank you for any help.</span><o:p></o:p></p>
<p class=MsoNormal><span lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<pre><o:p> </o:p></pre><pre><o:p> </o:p></pre><pre>_______________________________________________<o:p></o:p></pre><pre>Users mailing list<o:p></o:p></pre><pre><a
href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a><o:p></o:p></pre><pre><a
href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><o:p></o:p></pre></div>
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