Rule version TNDM-3X-000068 · STIG v1 · 2023-06-22
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.
From the NSX-T Manager web interface, go to System >> Fabric >> Profiles >> Node Profiles. Click "All NSX Nodes" and verify the NTP servers listed.
or
From an NSX-T Manager shell, run the following command(s):
> get ntp-server
If the output does not contain at least two authoritative time sources, this is a finding.
If the output contains unknown or non-authoritative time sources, this is a finding.
To configure a profile to apply NTP servers to all NSX-T Manager nodes, do the following:
From the NSX-T Manager web interface, go to System >> Fabric >> Profiles >> Node Profiles. Click "All NSX Nodes" and then click "Edit".
Under NTP servers, remove any unknown or non-authoritative NTP servers, enter at least two authoritative servers, and then click "Save".
or
From an NSX-T Manager shell, run the following command(s):
> del ntp-server <server-ip or server-name> > set ntp-server <server-ip or server-name>