So, check this little idea that I have - I want to browse the internet without all sorts of unscrupulous actors collecting every little bit of metadata on me and my family they can possibly get their hands on.
The way secondary DNS works is that a client distributes DNS requests across the primary and secondary DNS servers. So if you have pihole as your primary DNS and, say, 8.8.8.8 as your secondary DNS, you’re sending half of your DNS requests to google unfiltered. And if your pihole DNS goes down, half of your DNS queries time out.
The way to have redundancy with DNS is with a standby server that takes over the IP of the primary server if it goes down. You can do this with keepalived.
Secondary DNS is not for redundancy!
The way secondary DNS works is that a client distributes DNS requests across the primary and secondary DNS servers. So if you have pihole as your primary DNS and, say, 8.8.8.8 as your secondary DNS, you’re sending half of your DNS requests to google unfiltered. And if your pihole DNS goes down, half of your DNS queries time out.
The way to have redundancy with DNS is with a standby server that takes over the IP of the primary server if it goes down. You can do this with keepalived.
That’s so weird wtf why don’t they call it something like “DNS pool” then?