I got a "home" Verizon box, and the first thing I did was change the DNS setting... 1.1.1.1 wasn't working, and I wanted to change it back to default. Verizon's tech support are idiots... they literally wouldn't give me the default DNS IP because they were concerned about security.

Google's DNS worked fine, but Cloudflare's didn't. No idea if they ever fixed it... I'm using it as a backup for my main connection, eventually I'll setup autofailover on my router (OpnSense). For now, I just swap the cables.

Quantenna used 1.1.1.1 for RPC to their wifi chip in their SDK by default. Should not have been exposed to global routing but of course people screwed that up.

https://medium.com/@mrtcve/atts-misuse-of-cloudflare-dns-ip-...