Recent NTP pool traffic increase

David opendak at
Mon Dec 19 21:12:27 UTC 2016

On 2016-12-19 1:55 PM, Jan Tore Morken wrote:
> On Mon, Dec 19, 2016 at 01:32:50PM -0700, David wrote:
>> I found devices doing lookups for all of these at the same time
>> {0,,,asia,europe,north-america,south-america,oceania,africa,europe}
>> and then it proceeds to use everything returned, which explains why
>> everyone is seeing an increase.
> Thanks, David. That perfectly matches the list of servers used by
> older versions of the ios-ntp library[1][2], which would point toward
> some iPhone app being the source of the traffic.
> [1]
> [2]

That would make sense - I see a lot of iCloud related lookups from these 
hosts as well.

Also, generally seems to follow just after the NTP pool 
DNS lookups. I don't have an iPhone to test that though.


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