That RFC is about DNS in the context of zones for domain names (DNS zones). Not for a DNS client running DNS queries like an operating system.
Comment on Noob question about PiHole
SimonSaysStuff@lemmy.world 10 months agoRFC 2182 details the operation and functionality of secondary DNS servers. Which defines/influences how resolvers behave with multiple DNS servers.
TCB13@lemmy.world 10 months ago
AtariDump@lemmy.world 10 months ago
When it comes to a “secondary”DNS… there is nothing like a primary and secondary DNS server. These indications are quite misleading but many systems adopted it this way. Pihole only list the DNS servers as primary and secondary, because this is what the providers write on their pages. The bad phrasing is supported especially by how Windows handles it.
Most operating systems implement DNS servers as alternatives, not as fallbacks, i.e. they will query any of both servers from time to time, so it is quite likely that you will loose your Pi-hole filtering capabilities (at least partially) [if you specify a secondary DNS server on your network].
The ONLY DNS server you should have set on your network is a/the PiHole(s).