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The system clock must be synchronized continuously, or at least daily.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22290 GEN000241 SV-32521r1_rule ECSC-1 Medium
Description
A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. Internal system clocks tend to drift and require periodic resynchronization to ensure their accuracy. Software, such as ntpd, can be used to continuously synchronize the system clock with authoritative sources. Alternatively, the system may be synchronized periodically, with a maximum of one day between synchronizations. If the system is completely isolated (that is, it has no connections to networks or other systems), time synchronization is not required as no correlation of events or operation of time-dependent protocols between systems will be necessary. If the system is completely isolated, this requirement is not applicable.
STIG Date
UNIX SRG 2013-03-26

Details

Check Text ( C-32829r1_chk )
Check the system's configuration to determine if the NTP daemon is running continuously, or if a scheduled job is configured to synchronize time at least every hour. If the NTP daemon is not running, and there is no scheduled job for time synchronization, this is a finding.
Fix Text (F-28940r1_fix)
Configure the system to synchronize time continuously or schedule a job to perform time synchronization at least once per hour. Consult system documentation for implementation details.