SC-45.1: Synchronization with Authoritative Time Source

Statement

• (a)

  Compare the internal system clocks frequency with authoritative time source ; and

• (b)

  Synchronize the internal system clocks to the authoritative time source when the time difference is greater than time period .

• • 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.