I'm blocking private IPv4 addresses on my servers by default from now on

Yesterday, I was setting up a new Raspberry Pi Zero 2W in my home network. I'm going to use it to revive an old Brother printer I have lying around and install CUPS on it, so that I can use said printer as a network printer on the cheap. I just had the Pi flashed with a headless Ubuntu, and preconfigured it to connect to my home network via WiFi. I even gave it an example.local hostname so that I…