NTP Server Tutorial

by FARHAN MANSURI Web Designer Computer network - one of the most difficult aspects of information and communication technologies (ICT). Logistics connect terminals, routers, printers, and other devices - a headache.

One of the most important aspect that is often overlooked, which in turn leads to deplorable consequences - time synchronization.

It is necessary that the time for all devices on the network to coincide with a time stamp, a format with which computers translate each other time - only reporting system, which uses a computer to determine the sequence of events. If the machines are the same network will show different times, may have unintended consequences, such as an e-mail will come before it technically sent. Cases and other anomalies that only reinforce administrative headache.

Moreover - unsynchronized computer network security is always under the threat of fraud. Fortunately, the NTP time server is used for many years and makes the headache associated with the synchronization time.

Moreover - unsynchronized computer network security is always under the threat of fraud. Fortunately, the NTP time server is used for many years and makes the headache associated with the synchronization time.

NTP (Network Time Protocol) - one of the oldest protocols used by computer networks. Designed for about three decades ago, NTP - a protocol that checks the time on all devices and adds or takes away a certain amount of time, providing them synchronized.

NTP requires a time reference to synchronize the clock network. Since NTP can synchronize a network to any time not necessary to have an authoritative time source. UTC (Universal Time coordinate) - is used world-scale time, based on the time show an atomic clock. Since atomic clocks lose less than a second of time for over a thousand years, UTC time is the best source for network synchronization. Thus, your network will not only perfectly synchronized inside, it will also be synchronized in time with millions of computers around the world.

NTP server can receive UTC time standard from multiple sources. The most common source is the Internet, however, the time sources on the Internet are not always accurate and inaccurate sources are unlikely to creep on any large . And if you place the NTP server firewall is  keep him open and let the NTP server to gather resources across the network and thus the threat of exposing the entire network, especially  of what NIP-authentication (security measure of the NTP) is not possible on the Internet .

There are two much more reliable and accurate method of obtaining time standard UTC. First - use national time and frequency transmission, broadcast physical laboratories in different countries. Basically it is the long-wave broadcasts, the advantage of which - an opportunity to catch them in the server room, while many countries do not use these signals.

Many NTP-servers can, however, catch the time signal broadcast satellite atomic clocks built GPS. This signal is available everywhere, but it takes a GPS-antenna with a net
visibility of the sky.

When using UTC time source using the GPS network or radio, you can synchronize your network to a few milliseconds time UTC.

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Created on Dec 31st 1969 18:00. Viewed 0 times.

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