IP Passthrough settings
I am exploring IP Passthrough in order to use an RPi Pi-Hole and DNS resolver. Without instruction from ATT, I have a router set up with Static IP, mirroring the ATT Fiber Gateway settings:
copied the WAN IP address and gateway;
and I guessed the subnet mask to be 255.255.254.0;
and tried 184.108.40.206 for Static DNS. I also created my own Hostname and Domain Name.
It seems to work for my purposes. However, are there better settings that I should have consulted ATT about?