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<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hello. Yes, we use it in “Invite method”.<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
voipfreak.net@gmail.com [mailto:voipfreak.net@gmail.com] <b>On Behalf Of </b>Laszlo<br>
<b>Sent:</b> Thursday, April 04, 2013 9:07 PM<br>
<b>To:</b> 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 style='margin-bottom:12.0pt'>Hi Andrei,<o:p></o:p></p>
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<p class=MsoNormal>Do you use force_rport(); in the config?<o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p>
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<p class=MsoNormal>2013/4/4 Гогичашвили Андрей <<a
href="mailto:a.gogichashvili@ptl.ru" target="_blank">a.gogichashvili@ptl.ru</a>><o:p></o:p></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Hello! I have some trouble with nat handling.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>I have such scheme:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>uac1---opensips---(NAT)---uac2</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>BYE generated by UAC2 has such via header:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>and the BYE comes from U 2013/04/04 17:21:50.287792 <a
href="http://1.1.1.1:59292" target="_blank">1.1.1.1:59292</a> -> <a
href="http://2.2.2.2:5068" target="_blank">2.2.2.2:5068</a></span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Where 1.1.1.1 – nat, 2.2.2.2 - opensips</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Opensips adds one more via header to the BYE:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>and changes first via header by adding received field:</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>200 OK got from UAC1 opensips tries to send not to <a
href="http://1.1.1.1:59292" target="_blank">1.1.1.1:59292</a> but to <a
href="http://1.1.1.1:5060" target="_blank">1.1.1.1:5060</a></span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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 style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Thank you for any help.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
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