pool.ntp.org


pool.ntp.org: public ntp time server for everyone

Introduction

Active Servers

As of 2017-02-27

The pool.ntp.org project is a big virtual cluster of timeservers providing reliable easy to use NTP service for millions of clients.

The pool is being used by millions or tens of millions of systems around the world. It's the default "time server" for most of the major Linux distributions and many networked appliances (see information for vendors).

Because of the large number of users we are in need of more servers. If you have a server with a static IP address always available on the internet, please consider adding it to the system.

The project is maintained and developed by Ask Bjørn Hansen and a great group of contributors on the mailing lists. The source code for the system is available.

Hosting and bandwidth for the "hub" servers are provided by Develooper and Phyber Communications.

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News

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  • January 1, 2017

    NTP Pool Forum

    There’s a new forum for discussion related to the NTP Pool at community.ntppool.org. Please come join us. There are a couple interesting threads about the recent leap second and lots of empty space for your questions or suggestions. :-)

    The NTP Pool mailing lists are generously hosted on lists.ntp.org on the Network Time Foundation infrastructure. Those servers moved this summer and it’s been a bit of “rough seas” since. Over the summer hundreds of people got unsubscribed because mail deliveries were failing and the lists were bouncing all mails for a while in the second half of December.

    We’ll keep having the mailing list, too. In particular for people new to the project having us build out the new forum will be better (search, better access to archives, getting more mail in your email inbox is optional, etc).

    Happy new year!

  • December 19, 2016

    Excessive load on NTP servers

    Since last Tuesday some countries have seen an excessive number of queries to the NTP Pool.

    After much detective work on nanog (conclusion) and the #NTP IRC channel it was determined to be a buggy Snapchat app update.

    Hopefully the Snapchat developers will fix it soon (and sign up for a vendor zone!).

    (Yes, the first link is to a new forum).

  • November 29, 2016

    Equipment failure

    A network switch failed causing an outage for the management system and the NTP Pool website. The DNS and NTP services should only be minorly affected, even if the outage lasts a little while.

    I’ll update status website with updates.

  • November 4, 2016

    NTP Best Current Practices

    The IETF has published a new version of NTP Best Current Practices documenting learned best practices on how to run NTP servers and clients.

    If you know a little about the NTP protocol reading it will be a quick way to learn more about how it works “in the wild” (including on your own systems).

    Some of it is specific to the “reference” ntpd implementation, but much of it will apply to other clients or servers, too.

  • August 27, 2016

    System status page

    Thanks to the kind folks at statuspage.io we now have a system status page. It’s also available at an alternate domain.

    Most of the data is updated manually, so it won’t be any better than the busy humans can manage, but it’ll be a better system for giving system updates than posting here (or on the dicussion mailing list).

    Update Whoops, I completely forgot that ntppool.org is in the HSTS preload list.

    The site was working for me in the browsers I tested. I’ve contacted statuspage.io about getting a TLS cert added, in the meantime ntppool.statuspage.io works.

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Links

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Status | Comments and questions to Ask Bjørn Hansenask@develooper.com