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</o:shapelayout></xml><![endif]--></head><body lang=FR link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Hi Guillaume,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>have you tried to cache your DNS queries with the dns_cache module (<a href="https://opensips.org/html/docs/modules/3.3.x/dns_cache">https://opensips.org/html/docs/modules/3.3.x/dns_cache</a>) ?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:12.0pt;color:black;mso-fareast-language:FR'>De : </span></b><span style='font-size:12.0pt;color:black;mso-fareast-language:FR'>Users <users-bounces@lists.opensips.org> au nom de <guillaume.desgeorge@orange.com><br><b>Répondre à : </b>OpenSIPS users mailling list <users@lists.opensips.org><br><b>Date : </b>mardi 9 janvier 2024 à 10:35<br><b>À : </b>OpenSIPS users mailling list <users@lists.opensips.org><br><b>Objet : </b>[OpenSIPS-Users] DNS could not resolve hostname in dispatcher<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='mso-fareast-language:FR'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Hi everyone,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>We are facing a problem with Opensips 3.3 (but I’ve done tests on opensips 2.4 and it was the same).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>In the dispatcher, if we have a name instead of an IP address in “destination”, and that the DNS falls down, we have an error “could not resolve hostname” in the log. Then, Opensips can’t resolve the name, there is no more OPTIONS message sent to the destination but the state stays as 0 and if a call arrives, Opensips still route the INVITE to the last known IP address.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>I find that’s strange : <o:p></o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo3'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>Either Opensips consider that the DNS is down but the destination may be still up with the last IP address he knows and he could still send OPTIONS messages to the last known IP address<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo3'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>Either Opensips consider that the DNS is down and doesn’t send OPTIONS message but in that case he should not send INVITE to the old IP address.<o:p></o:p></span></li></ul><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>I work with a product that has his own DNS and removes the name of the server in the DNS when the machine is down. So everytime the server is down, Opensips can’t resolve the name and still send calls to that server…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>Is there any parameters I can use to change that way of working ?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'> Guillaume</span><o:p></o:p></p><div style='margin-left:5.0pt;margin-top:5.0pt;margin-right:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal align=center style='text-align:center'><span style='font-size:8.0pt;font-family:"Helvetica 75 Bold";color:#ED7D31'>Orange Restricted<o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial",sans-serif'><o:p> </o:p></span></p><pre>____________________________________________________________________________________________________________<o:p></o:p></pre><pre>Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc<o:p></o:p></pre><pre>pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler<o:p></o:p></pre><pre>a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,<o:p></o:p></pre><pre>Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>This message and its attachments may contain confidential or privileged information that may be protected by law;<o:p></o:p></pre><pre>they should not be distributed, used or copied without authorisation.<o:p></o:p></pre><pre>If you have received this email in error, please notify the sender and delete this message and its attachments.<o:p></o:p></pre><pre>As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified.<o:p></o:p></pre><pre>Thank you.<o:p></o:p></pre><p class=MsoNormal><span style='mso-fareast-language:FR'>_______________________________________________ Users mailing list Users@lists.opensips.org http://lists.opensips.org/cgi-bin/mailman/listinfo/users <o:p></o:p></span></p></div></body></html>