>>105615212
if you don't put in a dns server it will obviously default to your ip's dns.

>I'm trying to setup my Adguard docker container IP address as the DNS server for all my devices on the router level
is the docker hosted on the same machine as opnsense? typically to do that you leave the dns blank in opnsense and set the upstream in adguard to 127.0.0.1:adguard port like so. there are many tutorials on doing it

opnsense already has a plugin for adguard home so im not sure why you're running it in docker