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

Greg Choules gregchoules at googlemail.com
Fri Oct 4 17:19:52 UTC 2019

>From a mobile operator in the UK, we saw an increase in TCP queries
starting on 20 Sept and ramping up. The current level (though not huge) is
almost double what it was before iOS 13 came out.

cheers, Greg

On Fri, 4 Oct 2019 at 15:25, David <opendak at shaw.ca> wrote:

> Hello,
> We have recently observed an uptick in clients doing DNS queries over
> TCP that started around the release date of iOS 13 and has grown since
> then. Most of the qnames seem to be Apple related which points in that
> direction.
> Has anyone else seen the same in their environment?
> Thanks,
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> dns-operations at lists.dns-oarc.net
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