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<p class="MsoNormal"><span lang="EN-CA">Is it possible that if my http client keeps the connection alive with Stunnel then Stunnel would reuse variable/pointers which would have been cleared by previous call and therefore sends an empty name to the name server
resulting in the </span><span lang="EN-CA">EAI_NONAME error?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">We are running with delay = yes option as the endpoint name change IP sometime.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">We use Stunnel on the client side.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">No one having that same problem ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Vincent</span><span lang="EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:EN-AU">From:</span></b><span lang="EN-US" style="mso-fareast-language:EN-AU"> stunnel-users [mailto:stunnel-users-bounces@stunnel.org]
<b>On Behalf Of </b>Vincent Deschenes<br>
<b>Sent:</b> Friday, 6 April 2018 11:35 AM<br>
<b>To:</b> stunnel-users@stunnel.org<br>
<b>Subject:</b> [stunnel-users] Rapid subsequent DNS resolution fails within stunnel<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<span style="font-size:9.0pt;font-family:"Segoe UI",sans-serif;color:#212121;mso-fareast-language:EN-AU">This sender failed our fraud detection checks and may not be who they appear to be. Learn about <a href="http://aka.ms/LearnAboutSpoofing">spoofing</a><o:p></o:p></span></p>
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<span style="font-size:9.0pt;font-family:"Segoe UI",sans-serif;color:#212121;mso-fareast-language:EN-AU"><a href="http://aka.ms/SafetyTipsFeedback">Feedback</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-CA">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">We have had this weird problem for a long time where sometime DNS resolution will fail with this error:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Error resolving 'domain name printed here’: Neither nodename nor servname known (EAI_NONAME)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Today I found out that this will happen when stunnel get 2 calls for the same outgoing endpoint very fast one after the other.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">One call will work no problem. But if you do 2 one after the other then the second one and all other subsequent will fail.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Wait a bit and try again, the first one will pass and then others will fail.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">DNS resolution on the server (linux) itself work without problem, nslookup in loops no problem. But with stunnel we always have the problem.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">The only working solution is to add a record to the server host file.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Any idea ? Could this be a bug in stunnel ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA">Vincent<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-CA"><o:p> </o:p></span></p>
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