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NTP [Network Time Protocol]

Unit 4, 2-8 South St

Rydalmere, NSW 2116

T: 13 14 91

F: 1800 659 025

W: www.simplextime.com.au

NTP definition & Application

Document: NTP.doc Issued: October 2008

Q: How can NTP be delivered?

NTP can be delivered in the following ways:

a) Internet can be used by local Time servers to obtain UTC time (there are many free

NTP reference sites)

b) Satellites and GPS receivers propagate time within their positioning data stream and

are used to synchronize NTP Time Servers and Master Clocks.

c) Set up an existing LAN Server to be an NTP Server (or proxy server) and synchronize

this local NTP server to the internet time service.

d) SNTP Client sync Synchronize the time in Simplex Master Clocks, for existing sync.

wired clock installations

a. Using SNTP 6*00-3500 Client device

e) Synchronize Ethernet clocks directly

Q: Why is NTP Important?

A: In a commercial environment, accurate time stamps are essential to everything from

maintaining and troubleshooting equipment and forensic analysis of distributed attacks, to

resolving disputes among parties contesting a commercially valuable time-sensitive

transaction. Within law enforcement, they are essential for correlation of distributed

communication events, forensic analysis, and potential evidentiary use in criminal

proceedings.

In essence, all debugging, security, audit, and authentication is founded on the basis of

Sequence of Event (SOE) correlation (knowing exactly what happened in what order, and on

which side), and that depends on good time synchronization.

Once you have a local accurate time source all devices have the potential to synchronize as

long as they have some means of interfacing to the LAN and NTP protocol.

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