Have you considered just blocking outgoing on port 53 on your network? There are a few too many devices out there that have hardcoded DNS and don't respect the resolver communicated to it. (Chromecast is an easy…
Have you considered just blocking outgoing on port 53 on your network? There are a few too many devices out there that have hardcoded DNS and don't respect the resolver communicated to it. (Chromecast is an easy…