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Assessment Title
Rule Text
The Juniper EX switch must use an an NTP service that is hosted by a trusted source or a DOD-compliant enterprise or local NTP server.
Description
Discussion Text
If a trusted time source is not used, an attacker can introduce a rogue NTP server. This rogue server can then be used to send incorrect time information to network devices, which will make log timestamps inaccurate which may hide attacks or result in inaccurate forensic analysis.
The recommended solution is that the application or endpoint is configured to point to an enterprise or site-owned time server that is DOD-compliant (instead of directly to an NTP source as implied by the current wording of the requirement). Most products are unable to meet the requirement, but DISA can mitigate the risk by using a trusted time source. So the requirement should state that NTPS is used with USNO NTP as an alternative mitigation for this to be marked as Not a Finding.
More information can be found at:
https://www.cnmoc.usff.navy.mil/Our-Commands/United-States-Naval-Observatory/Precise-Time-Department/Network-Time-Protocol-NTP/DoD-Customer-Servers/
DOD users should not use tick, tock, or ntp2. There are also instructions for obtaining authenticated NTP at the site listed above.
The recommended solution is that the application or endpoint is configured to point to an enterprise or site-owned time server that is DOD-compliant (instead of directly to an NTP source as implied by the current wording of the requirement). Most products are unable to meet the requirement, but DISA can mitigate the risk by using a trusted time source. So the requirement should state that NTPS is used with USNO NTP as an alternative mitigation for this to be marked as Not a Finding.
More information can be found at:
https://www.cnmoc.usff.navy.mil/Our-Commands/United-States-Naval-Observatory/Precise-Time-Department/Network-Time-Protocol-NTP/DoD-Customer-Servers/
DOD users should not use tick, tock, or ntp2. There are also instructions for obtaining authenticated NTP at the site listed above.
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