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Roku OS home screen is getting video ads for the first time
(arstechnica.com)
This is a most excellent place for technology news and articles.
Then you block that too at the router level (port 853 if my memory is correct)
DNS over TLS (aka DoT) uses port 853. DNS over HTTPS (aka DoH) uses port 443 so that it looks the same as any other web traffic for privacy reasons.
Yeah, that’s going to be an issue.