Details
System time should be synchronized between all systems in an environment. This is typically done by establishing an authoritative time server or set of servers and having all systems synchronize their clocks to them.
Rationale:
Time synchronization is important to support time sensitive security mechanisms like Kerberos and also ensures log files have consistent time records across the enterprise, which aids in forensic investigations.
Solution
On physical systems or virtual systems where host based time synchronization is not available run one of the following commands to install either ntp or chrony :
# yum install ntp
Or
# yum install chrony
On virtual systems where host based time synchronization is available consult your virtualization software documentation and setup host based synchronization.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Audit and Accountability.This control applies to the following type of system Unix.