Hi, small question: I have set OpenDNS as primary DNS and Google (8.8.4.4.) as the secondary one in PiHole. I always thought that the secondary DNS is a fall-back solution; only used in case the primary DNS fails. However, looking at the admin page it seems that the Pi is simply using both at the …

Following the regulations, there is nothing like a primary and secondary DNS server. These indications are quite misleading but many systems adopted it this way. We only list the DNS servers as primary and secondary, because this is what the providers write on their pages. The bad phrasing is suppor…

Thanks for the fast reply. I always thought wrongly about primary and secondary DNS servers I guess. I can't seem to find this specific information for my router (Nighthawk R7000, if anyone knows). Since I run the PiHole on a RPi1 and the MicroUSB and SDCard reader sometimes have problems staying i…

[image] apexalpha: It seems the only way to find out if it uses both servers at the same time, like the Pi, is to wait and see if ads appear. You can also specifically blacklist some domain and try to access it several times a day from different client devices.

[image] apexalpha: Nighthawk R7000 I had a look at its manual . There seems to be no info about that.

Good idea! Thanks for the help. Still a bit dazzled that there are no 'real' primary and secondary DNS servers and that they simply co-exist. Would it also be possible to use more than 2 DNS servers? And how does PiHole decide what query to send where? Random? instant edit: yes, I checked their o…

[image] apexalpha: Would it also be possible to use more than 2 DNS servers? And how does PiHole decide what query to send where? Random? Yes. With the current version of Pi-hole you can use any number of servers (one or more). Pi-hole will query all of them from time to time and look for whi…

OpenDNS is faster than Google? Or do you not have that one activated, because that'd be a surprise! Danke schön for the perfect explanation.

[image] apexalpha: OpenDNS is faster than Google? Yes, OpenDNS seems to be faster than Google using Telekom DSL in between Cologne and Eifel. NB: Level3 is also better than Google but slightly worse than OpenDNS.

Just for anyway wondering: I've tested in and blacklisted a website in PiHole while also having a secondary DNS in my router. So far I only get the PiHole block page. Which, by the way, doesn't scale well on mobile resolutions, it seems. ( click ). I have tried on phone and laptop, and flushed DNS a…

I found this very interesting, as i was also under the assumption the primary DNS server would always be used, unless unavailable. I stand corrected. Given this new knowledge, I updated my DNScrypt setup ( no longer using dns-crypt-loader ) to use four resolvers. When I check te pi-hole log, dnsmasq s…

Pi-hole Userspace

Primary vs. Secondary DNS

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