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Windows WN11-00-000260

DISA STIG WN11-00-000260 (CAT III): The Windows 11 time service must synchronize with an appropriate DoW time source.

DISA STIG recommends

WN11-00-000260 CAT III

The Windows 11 time service must synchronize with an appropriate DoW time source.

NIST SP 800-53: AU-8(1), SC-45(1)

Check

Review the Windows time service configuration. Open an elevated "Command Prompt" (run as administrator). Enter "W32tm /query /configuration". Domain-joined systems (excluding the domain controller with the PDC emulator role): If the value for "Type" under "NTP Client" is not "NT5DS", this is a finding.

Fix

Configure the system to synchronize time with an appropriate DoW time source. Domain-joined systems use NT5DS to synchronize time from other systems in the domain by default. If the system needs to be configured to an NTP server, configure the system to point to an authorized time server by setting the policy value for Computer Configuration >> Administrative Templates >> System >> Windows Time Service >> Time Providers >> "Configure Windows NTP Client" to "Enabled", and configure the "NtpServer" field to point to an appropriate DoW time server. The US Naval Observatory operates stratum 1 time servers, identified at https://www.cnmoc.usff.navy.mil/Our-Commands/United-States-Naval-Observatory/Precise-Time-Department/Network-Time-Protocol-NTP/. Time synchronization will occur through a hierarchy of time servers down to the local level. Clients and lower-level servers will synchronize with an authorized time server in the hierarchy.

Our decision

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