Change address on every DHCP renewal

Posted Aug 27, 2025 15:34 UTC (Wed) by Wol (subscriber, #4433)
In reply to: Change address on every DHCP renewal by farnz
Parent article: Linux's missing CRL infrastructure

Given that the hosts file has to be updated and shipped around, regenerate the DHCPd persistent state by importing the hosts file and say "if the requester says 'my name is X', look up X in the hosts file and return that IP if found".

Dunno how it worked :-) but one system I worked on, you put the hostname in /etc/hostname, and added the host/IP to /etc/hosts, and that was how it discovered its own (fixed) IP address.

Cheers,
Wol