|Finding ID||Version||Rule ID||IA Controls||Severity|
|The loss of connectivity to a particular authoritative time source will result in the loss of time synchronization (free-run mode) and increasingly inaccurate time stamps on audit events and other functions. Multiple time sources provide redundancy by including a secondary source. Time synchronization is usually a hierarchy; clients synchronize time to a local source while that source synchronizes its time to a more accurate source. The network device must use an authoritative time server and/or be configured to use redundant authoritative time sources. This requirement is related to the comparison done in CCI-001891. DoD-approved solutions consist of a combination of a primary and secondary time source using a combination or multiple instances of the following: a time server designated for the appropriate DoD network (NIPRNet/SIPRNet); United States Naval Observatory (USNO) time servers; and/or the Global Positioning System (GPS). The secondary time source must be located in a different geographic region than the primary time source.|
|Network WLAN AP-NIPR Management Security Technical Implementation Guide||2021-04-16|
|Check Text ( C-46445r719963_chk )|
| Review the configuration and verify the network device synchronizes internal information system clocks using redundant authoritative time sources. |
If the device is not configured to synchronize internal information system clocks using redundant authoritative time sources, this is a finding.
|Fix Text (F-46402r719964_fix)|
|Configure the device to synchronize internal information system clocks using redundant authoritative time sources.|