pool.ntp.org


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

Introduction

Active Servers

As of 2019-05-25

O projeto pool.ntp.org é um grande cluster virtual de servidores de tempo fornecendo um serviço NTP confiável e fácil de usar para milhões de clientes.

A pool está sendo usada por milhões ou dezenas de milhões de sistemas por todo o mundo. É o "servidor de tempo" padrão para a maioria das distribuições Linux e muitos appliances de rede (veja informação para fabricantes).

Por causa do grande número de usuários nós estamos precisando de mais servidores. Se você tem um servidor com um endereço IP estático sempre disponível na Internet, por favor considere adicioná-lo ao sistema.

O projeto é mantido e desenvolvido por Ask Bjørn Hansen e um grande grupo de contribuidores na lista de discussão. O código está disponível.

Hospedagem e largura de banda para os servidores "hub" são atualmente fornecidos por Develooper e Phyber Communications.

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Novidades

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  • April 5, 2019

    GPS rollover

    As you might have seen in the news or from the US CERT, there’s an internal counter in the GPS messages that will “rollover” this week.

    Poorly implemented GPS receivers might lose track of time because of this.

    Many servers in the NTP Pool are using GPS signals to set the time, either directly or indirectly from another server that listens for GPS signals.

    The expected impact on users of the NTP Pool is very little or none at all. The NTP Pool monitoring system will detect any systems that are wildly off and have them removed from DNS responses within typically 10-20 minutes.

    Most servers would also recognize that the “jump” in time from a potentially misbehaving GPS clock is too large and ignore it (the time would be set back to August 1999, most likely).

    Most importantly, reasonably well written clients will poll 3 or 4 IPs and ignore the one that’s an outlier by decades, recognize that the time returned is many years older than the earliest possible manufacturing date of itself or that the jump in time is too large and again ignore it.

    The time of the rollover is midnight UTC on April 7 (so late afternoon April 6th in California or the morning of April 7 in Asia). We will be checking the NTP Pool monitoring data for any signs of problems through the day.

    See also the NTP Pool community discussion.

  • May 21, 2017

    How to Configure NTP for Use in the NTP Pool Project

    Daniel Ziegenberg wrote a tutorial for Digital Ocean on configuring NTP for the NTP Pool on Ubuntu.

    Oliver Nadler has another tutorial covering non-Ubuntu, too.

  • 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.

  • Older news...

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