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!!! Servers For Everyone For smaller networks and end users, the best [NTP] servers to use are the ones supplied by your service provider or ISP. Many [ISP]s have servers for their customers: * <tt>ntp.iprolink.co.nz</tt> * <tt>tk1.ihug.co.nz to tk3.ihug.co.nz</tt> * <tt>time.paradise.net.nz</tt> or you could try querying your [ISP]'s [DNS] servers with <tt>ntp</tt> or <tt>ntp1</tt>. There is a pool of 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 1 Servers First: __be nice!__ You shouldn't synchronise to a stratum 1 server for your small network -- if everyone did that then the server would need too much bandwidth. For example, ~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. If you are running a substantial network, you should install your own NTP servers, based on the servers below. ! .nz Registry Services There are four stratum 1 NTP servers provided by [.nz Registry Services (NZRS)|http://ntp.net.nz/] for network operators based within New Zealand. They are operated by NZRS Limited, a wholly-owned subsidiary of [InternetNZ|https://internetnz.nz/]. It is not a public network but is covered by an [Acceptable use policy|https://ntp.net.nz/pages/aup.html]. These timeservers are provided primarily for network operators based within New Zealand and peripatetic users who are ordinarily based in NZ. * ntp1 is in Albany connected via FX. * ntp2 is in Auckland CBD connected via [ICONZ]. * ntp3 is in Wellington CBD connected via FX. * ntp4 is in Christchurch connected via 2Degrees. The host names <tt>__s__~[1-4~].ntp.net.nz</tt> can be used for: * Desktops and laptops * Your own home router The host names <tt>__p__~[1-4~].ntp.net.nz</tt> can be used for: * Stratum 2 NTP servers. * Kit normally found in a server room, such as servers, enterprise routers (not consumer products), SANs etc. The following devices are [not allowed|https://ntp.net.nz/pages/aup.html]: * Consumer devices such as printers, cameras, mobile phones, etc. All four are Sonoma D12 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. They are not actively synchronised to each other. [more|https://ntp.net.nz/pages/network-architecture.html] ! The Measurement Standards Laboratory The standard for time in New Zealand is maintained by the [Measurement Standards Laboratory|http://msl.irl.cri.nz/], part of [Industrial Research Limited|http://irl.cri.nz/]. MSL runs several public NTP servers that are referenced to UTC(MSL). The servers are publicly available to all connections from within NZ. * <tt>msltime.irl.cri.nz</tt> * <tt>msltime1.irl.cri.nz</tt> * <tt>msltime2.irl.cri.nz</tt> They are FreeBSD-based servers synchronised using a 1 pulse per second signal to the New Zealand time standard. The server time is typically stable with respect to the time in the HP5071A caesium clocks to around 1 microsecond. [more|http://msl.irl.cri.nz/services/time-and-frequency/ntp-server-information] !!! Universities Most universities restrict access to their NTP servers, however some are publicly accessible: * <tt>ntp.public.otago.ac.nz</tt> (Please notify before using) * <tt>ntp.massey.ac.nz</tt> For a long time WaikatoUniversity had public [NTP] servers. They are still available but no longer publicly accessible. !!! See also * [NTPNotes] * TimeSources * [Scientific study from 1999 on the topology of the country's main NTP servers | http://www.cosc.canterbury.ac.nz/research/reports/TechReps/1999/tr_9901.pdf ] (note that [GPS] is much more widely available now)
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