What is the ip of ntp server that ios devices use ?? [ V urgent pl ]

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Level 1

5 points

What is the ip of ntp server that ios devices use ?? [ V urgent pl ]

Hi Apple team , i am a Cisco TAC engineer and i am working with one of my customers, they have an issue where they are syncing there cisco devices to a public ntp server and that ntp server is giving them time difference of three minutes with their ios devices, which is leading to some accounting failures for them.

They need to sync their cisco devices to the same ntp source as their ios devices.

Thus letting me know what ntp server ip IOS devices are using will be very helpful.

Regards

Kushagra Kaushik

iPhone 6 Plus

Posted on Sep 10, 2015 8:03 PM

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Answer 1

FelipeV

Level 6

10,636 points

Sep 10, 2015 8:07 PM in response to kukaushi

I think it is time.apple.com but don't quote me.

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Answer 2

kukaushi Author

Level 1

5 points

Sep 10, 2015 8:50 PM in response to FelipeV

i did a nslookup on time.apple.com and got following ip

KUKAUSHI-M-Q08Y:~ kushagra$ nslookup time.apple.com

Server: 72.163.128.140

Address: 72.163.128.140#53

Non-authoritative answer:

Name: time.apple.com

Address: 17.253.84.253

Name: time.apple.com

Address: 17.253.6.253

Name: time.apple.com

Address: 17.253.82.253

There are so many ip(s) here , i would need one defininte one which i can let the customer know to configure on the box, in US.

Also if time.apple.com it's will it provide time to non iOS devices as well ?

I would need it for definite and certainty as customer will make change in production based on it.

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Answer 3

cnichs27

Level 1

0 points

Nov 20, 2015 9:57 AM in response to kukaushi

Any chance you received a good answer to your question? I am developing an iOS application and need all iOS devices to receive the same master clock. Right now, we have testing and our clocks our sometimes 5 seconds off using NTP. Thanks!

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Answer 4

FelipeV

Level 6

10,636 points

Nov 22, 2015 6:01 AM in response to cnichs27

Try posting your question in the developer forums. They might be able to help you there.

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