The Windows 10 laptop my son uses keeps on changing its Wifi MAC address, which in turn makes the DHCP server give it a new IP. It’s annoying. (I tried some registry changes I found on some website but didn’t work.)

Doing this kind of thing requires the child to have a consistent IP. (I tried a static IP, it causes problems if he ever takes the laptop out of our house.)

(Thinking about a scheduled task which reports its IP to the home server, so at least I know what it is all the time...)