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<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F5F5F;mso-fareast-language:EN-US">With dnsdist you can use a pool of resolvers in the background and set several options. Like:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F5F5F;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F5F5F;mso-fareast-language:EN-US">setUDPTimeout(num)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F5F5F;mso-fareast-language:EN-US"> Set the maximum time dnsdist will wait for a response from a backend over UDP, in seconds. Defaults to 2<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F5F5F;mso-fareast-language:EN-US">See
<a href="https://dnsdist.org/">https://dnsdist.org/</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Verdana",sans-serif;color:#5F5F5F;mso-fareast-language:EN-US">Br,<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="DE" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Von:</span></b><span lang="DE" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Unbound-users <unbound-users-bounces@lists.nlnetlabs.nl>
<b>Im Auftrag von </b>Frank Cusack via Unbound-users<br>
<b>Gesendet:</b> Dienstag, 4. Juni 2024 01:32<br>
<b>An:</b> Scott Q. <qmail@top-consulting.net><br>
<b>Cc:</b> unbound-users@lists.nlnetlabs.nl<br>
<b>Betreff:</b> Re: Backup resolver after X seconds<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">How about pointing unbound to a local dnsmasq instance, configured to use parallel upstreams?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><a href="https://serverfault.com/questions/732920/how-to-do-parallel-queries-to-the-upstream-dns-using-unbound">https://serverfault.com/questions/732920/how-to-do-parallel-queries-to-the-upstream-dns-using-unbound</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If you don't need some specific feature of unbound, you could just use dnsmasq by itself.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Jun 3, 2024 at 2:02<span style="font-family:"Arial",sans-serif"> </span>PM Scott Q. <<a href="mailto:qmail@top-consulting.net">qmail@top-consulting.net</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="color:black">Some apps have even longer and don't even try a backup resolver</span><br>
<br>
On Monday, 03/06/2024 at 15:57 Frank Cusack wrote:<br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">Sorry that this isn't actually an answer, but does it matter? What client has a 5s timeout before the client moves on to its own next resolver?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Jun 3, 2024 at 8:28<span style="font-family:"Arial",sans-serif"> </span>AM Scott Q. via Unbound-users <<a href="mailto:unbound-users@lists.nlnetlabs.nl" target="_blank">unbound-users@lists.nlnetlabs.nl</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Is there a way to configure within Unbound a backup resolver for all queries that take over 5 seconds for example ?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Aka, I'd like to forward to 8.8.8.8 all queries that I can't resolve for whatever reason: network issues, firewalls, etc.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">For example: dig +trace 77.184.100.61.in-addr.arpa<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This sometimes takes 10 seconds to resolve, other times it times out completely but 8.8.8.8 can return an answer within 1 second.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I also don't want to implement a per-host/network/domain solution, I just want to forward all queries that take longer than 5 seconds.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Is it possible or is there an alternative ?<br>
<br>
Thank you<o:p></o:p></p>
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