pool.ntp.org


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

Introduction

Active Servers

As of 2019-04-25

pool.ntp.org는 수백만 클라이언트들에게 안정적이고 사용하기 쉬운 커다란 가상의 시간 서버 클러스터를 제공하는 프로젝트입니다.

전 세계에 있는 수백만, 수천만의 시스템이 이 풀을 사용하고 있습니다. 대부분의 주요 리눅스 배포판과 많은 네트웍 설비들이 이 풀을 내정된 시간 서버로 사용하고 있습니다. (제조사를 위한 정보 참고).

많은 사람들이 사용하므로 서버가 더 필요한 상황입니다. 귀하가 만약 고정 IP 주소와 언제나 인터넷에 연결 되어 있는 서버를 소유하고 있다면 시스템에 합류하는 것을 고려해 보십시오.

이 프로젝트는 Ask Bjørn Hansen메일링 리스트 에 있는 대단한 기여자들에 의해 개발, 관리되고 있습니다. 소스 코드는 공개되어 있습니다.

"허브" 서버 호스팅과 대역폭은 현재 DevelooperPhyber Communications 에 의해 제공되고 있습니다.

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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.

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