Comment by eqvinox

18 days ago

> I don’t have any idea how they got the ip,

You might've been using DHCPv6 assigning sequential addresses starting at 1?

Remember: friends don't let friends use DHCPv6[*]. Help out, uninstall DHCPv6 today.

[*] in IA_NA mode (address assignment). PD and stateless info-only are fine.

3 comments

eqvinox

Reply
basilikum  17 days ago

What's so bad about DHCPv6?

  • eqvinox  17 days ago

    In IA_NA mode, you're at the mercy of the DHCPv6 server for any kind of address privacy. And good luck getting a second address if you want to run a CLAT for 464. You don't want this in a home network.

    As for servers, you mostly won't want it either, considering (a) you might rather configure things statically, and (b) it's easier to just deal out whole /64s per server, especially since that gives space for VMs.

    So where's the niche for DHCPv6? Maybe assigning addresses for telco or OOB equipment… idk.

    And just to be clear: DHCPv6 information-only ("stateless") and DHCPv6 prefix delegation modes are perfectly fine. It's the individual address assignment (IA_NA) mode that should just never have been invented.