GPS NTP Articles
Ever wondered why should you start using GPS NTP TimeServer today?
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Find your answers here!
- can I synchronise Windows, Linux or Unix?
- what is an ntp port?
- how does ntpserver work?
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NtpServer
In selecting a timing source to synchronise a computer network to using a NTP server it is important that the time source is accurate, secure and a source of UTC. UTC is a global timescale used by computer networks, business and commerce across the globe synchronised by GPS satellites.
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NTP for Windows
Windows Time Service uses a version of NTP, normally a simplified version, of the Internet protocol which is designed to synchronise machines on a network. All versions of Windows Server since 2000 have included a time synchronization facility, called w32time.exe
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NTP for Linux
Most of the Linux based operating systems contain their own version of NTP, which is designed to synchronize the time across a network. NTP Unix and Linux systems store keys in a secure file called "ntp.keys. Each line in the file provides a secure key in the format 'key number' encryption code 'key'.
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NTP clock
PC's utilise an internal hardware real-time clock to maintain time. Generally, this hardware clock circuit utilises very low-cost components. This results in poor time-keeping performance. As a consequence of need for accurate ntp clock, time servers were introduced.
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NTP port
NTP operates on UDP port 123, so you must ensure that this port is left open on your firewall. NTP is one of the oldest Internet protocols still in regular use today. Dr David Mills of the University of Dellaware invented it over 25 years ago. He recognised the need to synchronise time critical processes across the Internet. The Network Time Protocol allows client computers to synchronise to an accurate time reference over the Internet.
