MEDIUM M25: Chrony/NTP Configuration P3

Overview

Hardens time synchronization by restricting chrony to client-only mode, disabling the chronyc network interface, setting maximum poll intervals, and requiring multiple NTP servers for resilience.

Profile: NIST 800-53 Moderate (rhcos4-moderate)

Compliance Checks

Check Description
client-only Restrict chrony to client mode (no serving)
no-chronyc-network Disable chronyc network command interface
or-ntpd-set-maxpoll Set maximum NTP polling interval
or-ntpd-specify-multiple-servers Require multiple NTP servers

Verification

oc debug node/<node> -- chroot /host chronyc sources
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