JUNI-ND-001020 - The Juniper router must be configured to synchronize its clock with the primary and secondary time sources using redundant authoritative time sources - primary/prefer

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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 utilize 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.


Configure the router to synchronize its clock with redundant authoritative time sources as shown in the example below.

[edit system ntp]
set server x.x.x.x
set server x.x.x.x prefer

See Also


Item Details

References: CAT|II, CCI|CCI-000366, CCI|CCI-001893, Rule-ID|SV-217334r855876_rule, STIG-ID|JUNI-ND-001020, STIG-Legacy|SV-101257, STIG-Legacy|V-91157, Vuln-ID|V-217334

Plugin: Juniper

Control ID: df46045c64a22c642b794420388f0476d04af43eea0cf0ec4a9eafae9c7d55ba