Differences between version 18 and predecessor to the previous major change of NTP.
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| Newer page: | version 18 | Last edited on Wednesday, June 9, 2004 9:21:10 am | by JohnMcPherson | Revert |
| Older page: | version 12 | Last edited on Friday, April 2, 2004 2:31:12 pm | by FrankLuithle | Revert |
@@ -8,31 +8,40 @@
Have a look at a the following page for a list of the stratum 1 time servers http://www.eecis.udel.edu/~mills/ntp/clock1a.html .
Or the following for a list of the stratum 2 time servers, http://www.eecis.udel.edu/~mills/ntp/clock2a.html
! NTP in NewZealand
-Have a look at http://www.cosc.canterbury.ac.nz/~paul
/tr-cosc.01.99
.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).
!Stratum 1 NTP servers
Clear generously provides a stratum 1 NTP server for public use:
# bigben.clix.net.nz
However, you really shouldn't synchronise to a stratum one server for your small network - if everyone did that then the 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 syncing to a stratum 1 server and a lower stratum server is negligible!
+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.
+
+!Other NTP Servers
Some NewZealand [ISP]s have NTP servers for their customers:
# ntp.maxnet.co.nz
# ntp.iprolink.co.nz
# ntp.iconz.co.nz
-# tk1.ihug.co.nz to tk4
.ihug.co.nz
+# tk1.ihug.co.nz to tk3
.ihug.co.nz
# time.paradise.net.nz
or you could try querying your ISP's [DNS] servers with "ntp" or "ntp1".
Many of [NewZealand]'s Universities also have public time servers such as:
* ntp.public.otago.ac.nz (Please notify before using)
* ntp.massey.ac.nz (Open Access, use DNS, changed IP recently and now hosted by two machines)
-WaikatoUniversity no longer provides public access NTP servers, although they used
to have
-* truechimer1
.waikato
.ac
.nz
-* truechimer2
.waikato
.ac
.nz
-* truechimer3
.waikato
.ac
.nz
+For a long time
WaikatoUniversity had public NTP servers but
no longer provides public access.
+
+Your best bet for a small home or office network is to set your server
to
+"nz
.pool
.ntp
.org" or "pool.ntp.org", which will use DNS to choose one of
+the many servers now registered with that project
.
+
+! Non-NZ servers
+As mentioned above, pool
.ntp
.org is a round-robin [DNS] for many
+ntp servers
. Try <2-letter country code>
.pool.ntp.org
.
If you live in Germany (or somewhere close by) you may want to try this list:
* time1.rrz.uni-koeln.de
* time2.rrz.uni-koeln.de
@@ -52,16 +61,12 @@
* ntp2.fau.de
* ntp3.fau.de
* ptbtime1.ptb.de
* ptbtime2.ptb.de
-* Another very extensive list of public German NTP servers can be found at http://www.hullen.de/helmut/filebox/DCF77/ntpsrvr.html
-
-
-otherwise you could look for public servers on the internet on pages such as http://www.eecis.udel.edu/~mills/ntp/clock2a.html.
-
+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] or some other [list of public servers on the internet | http://www.eecis.udel.edu/~mills/ntp/clock2a.html].
Related pages:
HowToClock, [HowToTimePrecisionHOWTO], ntpd(1), ntpdate(1), hwclock(8)
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Part of CategoryNetworking
