Recent NTP pool traffic increase

Jan Tore Morken nanog at jantore.net
Mon Dec 19 20:55:56 UTC 2016


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
> {0,0.uk,0.us,asia,europe,north-america,south-america,oceania,africa,europe}.pool.ntp.org
> 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] https://github.com/jbenet/ios-ntp/blob/d5eade6a99041094f12f0c976dd4aaeed37e0564/ios-ntp-rez/ntp.hosts
[2] https://github.com/jbenet/ios-ntp/blob/5cc3b6e437a6422dcee9dec9da5183e283eff9f2/ios-ntp-lib/NetworkClock.m#L122

-- 
Jan Tore Morken


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