Thanks!
The pi-hole Pi has a reserved IP address set by the modem/router. Should I be doing something on the Pi itself to secure that internal IP address?
I'm running the Pi OS (Bookworm), and installed pi-hole via the Terminal under that OS. It's not running in Docker or any sort of a virtual machine.
Before I do this -- I'm assuming if things don't go well, I can always turn DHCP back on in the Vincent modem/router? I know when I tried changing the router address it required a factory reset and a lot of work to get things back; I just want to be sure I'm clear on the "undo" steps before trying this.