Differences between version 8 and predecessor to the previous major change of NTPServers.
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| Newer page: | version 8 | Last edited on Tuesday, August 14, 2012 3:49:16 pm | by SamBailey | Revert |
| Older page: | version 7 | Last edited on Sunday, February 7, 2010 2:11:58 pm | by JimCheetham | Revert |
@@ -1,76 +1,78 @@
-!!! [
NTP]
in NewZealand
+!!! 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).
+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).
-There is a pool of NewZealand servers at <tt>nz.pool.ntp.org</tt>, which provides RoundRobin [DNS] access to publicly accessible [NTP] servers that have agreed to be part of the pool.
+!! Stratum 2 Servers
-!!! Stratum 1
[NTP] servers in NewZealand
+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.
-The Measurements Standards Laboratory at Industrial Reasearch Limited run a HP5071A caesium atomic clock which is part of the New Zealand time standard. This server is available at the address msltime.irl.cri.nz.
[Read more details. | http://msl.irl.cri.nz/services/time-and-frequency/ntp-server-information
]
+Many
[ISP
]s have NTP servers for their customers:
-TelstraClear generously provides a stratum 1 [NTP] server for public use:''''
+* <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>
- <tt>bigben.clix.net.nz</tt>
+Some universities have publicly accessible servers:
-However, you really 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
. Please read http://list
.waikato
.ac.nz/pipermail/nznog/2001-October/003705
.html
. The difference in accuracy between synching to a stratum 1 server
and a lower stratum server
is negligible!
+* <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 example, read http://www.cs.wisc.edu/~plonka/netgear-sntp/ -- in summary, ~NetGear hard-coded
a public [
NTP] server into some of their consumer products, which eventually ended up using hundreds of Mbits/second of the university's bandwidth, even after they were forced to shut down the server
.
+For a long time [Waikato University|WaikatoUniversity] had
public NTP servers. They are still available but no longer publicly accessible
.
-!!! Other [NTP]
Servers
+!! Stratum 1
Servers
-Some NewZealand [ISP]s have NTP servers
for their customers
:
+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]
-* <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>
+!
.nz Registry Services
-or you could try querying your [ISP]'s [DNS]
servers with <tt>ntp<
/tt> or <tt>ntp1<
/tt>
.
+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/]
-Many of NewZealand's Universities also have public time servers such as:
+* <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].
-* <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)
+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
-For a long time WaikatoUniversity had public [NTP] servers
. They are still available but no longer publicly accessible
.
+<tt>pool
.ntp.org</tt> has NTP server pools for many countries
.
-!!! [NZ] Pool
+* <tt>au.pool.ntp.org</tt> Australia
+* <tt>us.pool.ntp.org</tt> United States
-Your best bet for a small home or office network is to set your server to <tt>nz.pool.ntp.org</tt> or <tt>pool.ntp.org</tt>, which will use RoundRobin [DNS] to choose one of
the many servers now registered with that project.
+!! Stratum 1 Servers in
the United States
-!!! German
[NTP]
servers
+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]
-Germany also has a pool
.ntp
.org entry:
<tt>de
.pool
.ntp
.org</tt>
+* <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
-If that doesn
't work for you
, you could try some of
the following
servers:
+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>time1
.rrz
.uni-koeln
.de
</tt>
-* <tt>time2
.rrz
.uni-koeln
.de</tt>
-* <tt>time3.rrz.uni-koeln.de</tt>
-* <tt>ts-1.rz.rwth-aachen.de</tt>
-* <tt>ntp1.t-online.de</tt>
-* <tt>www1.rrz.uni-koeln.de</tt>
-* <tt>hora.cs.tu-berlin.de</tt>
-* <tt>rustime01.rus.uni-stuttgart.de</tt>
-* <tt>rzfs2.rz.tu-bs.de</tt>
-* <tt>ns1.hrz.uni-giessen.de</tt>
-* <tt>ntp2-rz.rrze.uni-erlangen.de</tt>
-* <tt>mailbox.tu-berlin.de</tt>
-* <tt>ntps1-.cs.tu-berlin.de</tt>
-* <tt>ntp0.fau.de</tt>
-* <tt>ntp1.fau.de</tt>
-* <tt>ntp2.fau.de</tt>
-* <tt>ntp3.fau.de</tt>
-* <tt>ptbtime1.ptb.de</tt>
-* <tt>ptbtime2.ptb.de
</tt>
+* <tt>tick
.usnogps
.navy
.mil
</tt>
+* <tt>tock
.usnogps
.navy
.mil
</tt>
-You might also want to look at a
[very extensive list of public German NTP servers
| http://www.hullen
.de
/helmut
/filebox/DCF77/ntpsrvr
.html].
+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]
-!!! Other non
-[NZ] servers
+* <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)
-As mentioned above, <tt>pool.ntp.org</tt> is a RoundRobin [DNS] for many [NTP] servers. Try <tt>''cc''.pool.ntp.org</tt>, where ''cc'' is a country code.
+!! Stratum 1 Servers in Australia
-* [Public
NTP server lists at ntp
.org
| http://support
.ntp
.org
/bin
/view
/Servers/WebHome
]
+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]
