FedRAMP Controls / SC

SC-45(1) Synchronization with Authoritative Time Source

Family SC
Baselines moderate
Mapped KSIs 0

Control statement

(a) Compare the internal system clocks {{ insert: param, sc-45.01_odp.01 }} with {{ insert: param, sc-45.01_odp.02 }} ; and
    (b) Synchronize the internal system clocks to the authoritative time source when the time difference is greater than {{ insert: param, sc-45.01_odp.03 }}.
        Requirement: The service provider selects primary and secondary time servers used by the NIST Internet time service. The secondary server is selected from a different geographic region than the primary server.
        Requirement: The service provider synchronizes the system clocks of network computers that run operating systems other than Windows to the Windows Server Domain Controller emulator or to the same time source for that server.
        Guidance: Synchronization of system clocks improves the accuracy of log analysis.

Parameter placeholders {{ insert: param, … }} reference FedRAMP-set values in the resolved profile. Full parameter map is preserved in the catalog database.

No 20x Key Security Indicators map to this control in the current catalog version.