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


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: 800-53|AU-8(2), 800-53|CM-6b., CAT|II, CCI|CCI-000366, CCI|CCI-001893, Rule-ID|SV-217334r879746_rule, STIG-ID|JUNI-ND-001020, STIG-Legacy|SV-101257, STIG-Legacy|V-91157, Vuln-ID|V-217334

Plugin: Juniper

Control ID: 0fa271a2d5afebacfa509b8e160d1d7949620b4100017dcdd0e09276dccf1a36