[dns-operations] DNS over TCP query uptick with iOS 13?

David opendak at shaw.ca
Wed Oct 9 13:51:50 UTC 2019

On 2019-10-09 3:28 a.m., Vladimír Čunát wrote:
> On 10/9/19 8:53 AM, Xavier Beaudouin wrote:
>> I saw that DNS over TLS (not TCP) eg port 853/TCP is more and more used.
> I expect that's due to newer Androids getting to more people? (i.e. it 
> seems unrelated to OP)
> https://android-developers.googleblog.com/2018/04/dns-over-tls-support-in-android-p.html 

Yeah we see that too but you are correct we are referring to normal 
plain-old DNS over TCP. We're now at 10x the query rates compared to 
pre-iOS 13, which is still not a lot but is growing each day.

> --Vladimir
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