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 {0,0.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
That would make sense - I see a lot of iCloud related lookups from these hosts as well.
Also, app.snapchat.com generally seems to follow just after the NTP pool DNS lookups. I don't have an iPhone to test that though.
Thanks,
