cyberstrikeus 2.2.1.1 Ensure time synchronization is in use (Not Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
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.
Audit Procedure
On physical systems or virtual systems where host based time synchronization is not available run the following commands and verify either NTP or chrony is installed:
dpkg -s ntp
dpkg -s chrony
On virtual systems where host based time synchronization is available consult your virtualization software documentation and verify that host based synchronization is in use.
Expected Result
One of the two packages (ntp or chrony) should be installed.
Remediation
On physical systems or virtual systems where host based time synchronization is not available install NTP or chrony using one of the following commands:
apt-get install ntp
apt-get install chrony
On virtual systems where host based time synchronization is available consult your virtualization software documentation and setup host based synchronization.
Default Value
Time synchronization is not installed by default.
References
- CIS Controls: 6.1 Use At Least Two Synchronized Time Sources For All Servers And Network Equipment
Profile
- Level 1 - Server
- Level 1 - Workstation