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!!! NTP Servers in New Zealand Have a look at http://www.cosc.canterbury.ac.nz/research/reports/TechReps/1999/tr_9901.pdf for a scientific study (from 1999) of the topology of the country's main NTP servers. (A bit dated as [GPS] is much more widely available now). !! Stratum 2 Servers There is a pool of servers at <tt>nz.pool.ntp.org</tt>, which provides [Round Robin DNS|RoundRobin] access to publicly accessible [NTP] servers that have agreed to be part of the pool. Many [ISP]s have NTP servers for their customers: * <tt>ntp.iprolink.co.nz</tt> * <tt>ntp.iconz.co.nz</tt> * <tt>tk1.ihug.co.nz to tk3.ihug.co.nz</tt> * <tt>time.paradise.net.nz</tt> Some universities have publicly accessible servers: * <tt>ntp.public.otago.ac.nz</tt> (Please notify before using) * <tt>ntp.massey.ac.nz</tt> (Use the [DNS] name, as its [IP] changed recently and is now hosted by two machines) For a long time [Waikato University|WaikatoUniversity] had public NTP servers. They are still available but no longer publicly accessible. !! Stratum 1 Servers You shouldn't synchronise to a stratum one server for your small network -- if everyone did that then the server would probably need too much bandwidth. The difference in accuracy between synching to a stratum 1 server and a lower stratum server is negligible! [more|http://list.waikato.ac.nz/pipermail/nznog/2001-October/003705.html] ! .nz Registry Services There are three stratum 1 NTP servers provided by .nz Registry Services (NZRS) for network operators based within New Zealand. [more|http://ntp.net.nz/] * <tt>s1.ntp.net.nz</tt> is in Albany connected via FX. * <tt>s2.ntp.net.nz</tt> is in Auckland CBD connected via [ICONZ] and directly into [APE]. * <tt>s3.ntp.net.nz</tt> is in Wellington CBD connected via FX and directly into [WIX]. All three are Symmetricom S300 NTP servers, each connected to a differential GPS antenna on the roof and each with a rubidium oscillator to provide a stable clock in the event of an issue with the GPS signal. [more|http://ntp.net.nz/architecture/] ! The Measurements Standards Laboratory The standard for time in New Zealand is maintained by the Measurement Standards Laboratory, part of Industrial Research Limited. It is disseminated by various means, including 'pips' on several radio stations and NTP. * <tt>msltime.irl.cri.nz</tt> * <tt>msltime1.irl.cri.nz</tt> * <tt>msltime2.irl.cri.nz</tt> They are FreeBSD-based servers that are referenced to UTC(MSL) by direct connection to a pulse per second signal from their master HP5071A caesium clock which is part of the New Zealand time standard. [more|http://msl.irl.cri.nz/services/time-and-frequency/ntp-server-information] !!! Servers in other countries <tt>pool.ntp.org</tt> has NTP server pools for many countries. * <tt>au.pool.ntp.org</tt> Australia * <tt>us.pool.ntp.org</tt> United States !! Stratum 1 Servers in the United States The US National Institute of Standards and Technology (NIST) operates several publicly accessable stratum 1 time servers on the pacific coast of the US. These servers are referenced to UTC(NIST) using the NIST Automated Computer Time Service (ACTS), a modem-based service established in 1988. [more|http://tf.nist.gov/tf-cgi/servers.cgi] * <tt>nist1.symmetricom.com</tt> San Jose, California * <tt>nist1-sj.ustiming.org</tt> San Jose, California * <tt>nist1-la.ustiming.org</tt> Los Angeles, California * <tt>nist1.aol-ca.symmetricom.com</tt> Mountain View, California The US Naval Observatory (USNO) operates several stratum 1 time servers from it's Alternate Master Clock Facility (AMCF) at Falcon AFB, near Colorado Springs, on the same site as the GPS Master Control Station. These servers are referenced to a network of hydrogen maser and caesium standards that are synchronised with UTC(USNO) via satellite. [more|http://tycho.usno.navy.mil/clocks.html] * <tt>tick.usnogps.navy.mil</tt> * <tt>tock.usnogps.navy.mil</tt> Hurricane electric operates several stratum 1 servers with good connectivity on the pacific coast of the US. [more|http://www.he.net/adm/ntp.html] * <tt>clock.sjc.he.net</tt> San Jose, California (CDMA, Endrun Praecis CNTP) * <tt>clock.fmt.he.net</tt> Fremont, California (GPS, Symmetricom NTS-150) !! Stratum 1 Servers in Australia The Australian National Measurement Institute (NMI) maintains the Australian time standard, UTC(AUS) using caesium and hydrogen maser standards. NMI maintains a number of NTP servers which are referenced to UTC(AUS). To use these servers, you need to register via email. [more|http://www.measurement.gov.au/Services/Pages/TimeandFrequencyDisseminationService.aspx] ---- See also [NTPNotes]
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