Computer Time Synchronization
A Beginner's Guide to Network Time Protocol (NTP)
Note: This page is still accurate.
Why Synchronize Computer Times?
Why does it matter if computers have the same time as other computers on
their network or the correct time? It's important for the security of
networks and also a growing number of communication and application protocols
that require synchronized and/or accurate time on the computers on which
A key component of any computer security system is regular review and analysis
of both certain standard system log files as well as the log files created
by firewalls and intrusion detection systems. If computers are running
on different times, it becomes almost impossible to accurately match
actions logged on different computers. If you've suffered an intrusion,
even if your computers all have the same time, it might be difficult
to correlate logged activities with outside actions if your computer
times are wrong.
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