Name and IP don't match
E.g. If I use ping I get the wrong IP. This happens an all clients (UNIX/Windows) in my network.
PING broadlink-schlafen.fritz.box (192.168.178.49) 56(84) bytes of data.
But the real IP is 192.168.178.29. And 49 is my Laptop.
I have already executed restartdns and arpflush. Nothing changed.
Model name: ARMv7 Processor rev 4 (v7l)
Distributor ID: Raspbian
Description: Raspbian GNU/Linux 9.13 (stretch)
My router is a FritzBox 7590.
What I have changed since installing Pi-hole:
I think the cause lies in a hardware change of my router. Where the old and the new router have been connected simultaneously.