Hi Is there a way control manually configured dns settings on devices , the adblock home works perfect but if i configure my laptop to use google dns instead opensense it passes all dns filtering.
You have to implement firewall rules to block any DNS requests to servers other than your own.
I talk about it in part two of the blog post I did for DNS security and ad blocking.
https://www.cjross.net/dns-security-and-adblock-with-opnsense-part-2/
Perfect it works like a charm :)