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DNS through Netguard
(lemmy.ml)
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this post was submitted on 23 Jul 2023
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Privacy
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My understanding is the first one is the primary one, and will be used most of the time. The second one is the fallback and will be used if the primary isn’t reachable
Usually you’d have two different addresses from the same service to configure DNS
Listing addresses from two different services would get you a slightly inconsistent experience, where every once in awhile a different block list will be used
This depends on your OS. Many do it this way, but some (I think Windows is included here) periodically check and use the "fastest" one. I run 2 local DNS, and my windows devices tend to represent about 99% of the the queries showing up on the second DNS (which sees much lower traffic overall).
I have no idea what happens when you have 2 different blocklists though - it feels like you could open yourself up to a scenario where you only get content blocked if it's blocked on BOTH lists, which would be the worst of both worlds in a sense.
Usually your OS will just send dns requests to both servers at once and just accept whichever responds first. UDP isnt very smart.
Not sure about that, maybe that's the an approach for one OS, but most of the devices I have almost exclusively hit the first DNS.
Looking right now my primary DNS has ~29k queries across 17 clients with a fairly even spread across the top 5-6, while secondary shows 2.5k queries across 7 clients, with one client alone (a Mac) representing 2k of those queries.