2 points
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I haven’t experienced this. I have the Chromecast with Google TV dongle and use a DST Nat to redirect all traffic from 8.8.8.8 and 8.8.4.4 to my own DNS server.
I also did this with my old Chromecast only from phone version
4 points
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Maybe I should have specifically mentioned that it’s the ultras.
https://www.reddit.com/r/Chromecast/comments/pmt4cw/chromecast_ultra_just_updated_and_now_wont_work/
https://xdaforums.com/t/chromecast-ultra-issue-with-custom-dns.4396853/
https://discourse.pi-hole.net/t/custom-dns-group-for-chromecast/50996
It’s a bit of niche arrangement, so finding out what happened when it suddenly stopped working was a challenge.
3 points