Why can't I query Pi-Hole using dig?

[jfb]

@eggbean

when I use the dig command without specifying the DNS server, it uses the second DNS server, which is 1.1.1.1.

You should not have a second DNS server.

Why should Pi-hole be my only DNS server?

Reduced Ad Blocking Capability The main reason you should Pi-hole as your only DNS server is that you will see increased performance in the blocking of ads. If you have two DNS servers (Pi-hole and something else), your network clients may not always query Pi-hole for name resolution. If a query happens to be answered from a non-Pi-hole DNS server, your block lists will not apply (since that DNS server doesn't know about them). All Queries Need To Go Through Pi-hole First Since other DNS serv…