Why TF does it matter so much if you cheat in a single player game that they have to take such drastic measures to prevent it? In multiplayer, competitive games, I sort of get it, depending on context, but single player games, no way. I mod single player games all the time. It’s one of the main reasons I like PC gaming over console. I’d never buy a game that went this far to prevent something that has no effect on them or anyone else.
Cloudflare DDNS updated by ddclient on my OpnSense router. Cloudflare happens to be my current domain registrar. Honestly, my IPv4 doesn’t change that often. And when I used to be on Comcast, they assigned a block of IPv6 addresses and the router dealt with that. Unfortunately, I now have Quantum Fiber who only assign a single IPv6 address, so I gave up on IPv6 for now.