Oh, now that you mention it I’ve never tried to map a static DNS entry to a device without DNS. Welp, time to get thousands of raspberry pi’s to act as IP KVMs!

On my home network I make sure that my PDs are the same as my VLAN IDs so that I can at least know where a device is based on its IP. If I was smart I would also line them up with the IPv4 subnets as well.

I was going to say, my friend has to maintain some fucking DOS systems because their ancient embroidery machines only want to talk to software as old as they are, over connections as old as they are.

If you set up your DNS correctly then you don’t even need the IPs. Just give devices unique, human-readable names and maybe do separate sub-domains for each site or something.

it’s not a browser extension, its a SLAAC thing https://www.internetsociety.org/resources/deploy360/2014/privacy-extensions-for-ipv6-slaac.

TL;DR is that SLAAC used to use part of your device MAC to form it’s IP, which would be trackable/fingerprintable. Now devices just pick the last 48-bits at complete random on the assumption that no other device is going to have that specific address out of the 4 quintilion available addresses.

edit the RFC https://datatracker.ietf.org/doc/html/rfc4941

ah yes, the forbidden curl hack