Hi Shaun,
I’m not sure how the link provided is relative. Maybe I’m missing something.
I researched “force clients to use ipfire dns” and ended back up with the aforementioned Forcing all DNS traffic from the LAN to the firewall - #45 by jon.
I did run across this git.ipfire.org Git - ipfire-2.x.git/commit. But I do not know if this is included, or if it must be implemeted.
Thanks