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<p class="MsoNormal"><span lang="EN-US">Hello<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">My company updated their unbound installation a few days ago and I see some strange behavior after that.<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">Unbound is installed on a Centos 7 machine and the version we had was 1.9.0 from yum.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This version had some issues validating host names so I was asked to update to latest (1.13.2)<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">I compiled it with no extra flags and installed it, used our old config and started unbound.<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">To my confusion traffic was blocked in our firewall (port 853 only open to ssl and DoT) and when I reviewed the logs I see the traffic is identified as DoH but nothing like that is configured. And I was under the impression
that in order to make DoH work you have to pass some extra compilation flag which I have not done.<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">When I capture all traffic on the host I can only see DoT traffic so I suspect the firewall is identifying the traffic wrong. Have anyone else seen this? It’s a paloalto fw of some model.<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">The strangest thing of all is that before I upgraded the installation all traffic was identified as DoT, but no hostname verification.<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">I’m starting to think that the problem could actually be that the firewall is doing something wrong.<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">I hope someone can give me a push in the right direction in order to solve this.<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">BR<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Johan<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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