Pi-Hole and iptables

[jfb]

@MountFX

FritzBox cannot use raspberry pi anymore as DNS server and uses the fallback DNS sever.

There is no effective concept of a "fallback DNS server", and if you have a second DNS server listed in the router (that is not a Pi-Hole), then some of your network traffic will route to that DNS and bypass Pi-Hole.

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…