Genral Assistance in making Pi-Hole the main DHCP server

[deHakkelaar]

Some Ubuntu hints in below thread:

Modem Vodafone Station Wi-Fi 6 does not allow to set address pool to 1 IP

Hello everybody, I would love to setup pihole with my internet, but I have a problem: According to this post, I should restrain my modem´s pool to just one address, but my modem (Modem Vodafone Station Wi-Fi 6) doesn´t allow me to do so: Here is my modem´s LAN settings (Static DHCP 192.168.0.2 is my pihole device), and here is my Pihole DHCP setting - those should be according to that post, but for some reason, modem does not allow me to change this (highlighted in red) number to 2. I tried …