Nutanix OS must immediately notify the system administrator (SA) and information system security officer (ISSO) (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.

If security personnel are not notified immediately when storage volume reaches 75 percent usage, they are unable to plan for audit record storage capacity expansion.

1. Verify Nutanix OS is configured to act when allocated audit record storage volume reaches 75 percent utilization using the following command.

$ sudo grep -w space_left /etc/audit/auditd.conf space_left = 25%

If the value of the "space_left" keyword is not set to "25%", or is commented out, this is a finding.

2. Run the following command.

$ sudo grep -w space_left_action /etc/audit/auditd.conf space_left_action = SYSLOG

If the value of the "space_left_action" is not set to "SYSLOG" or is commented out, this is a finding.

1. For AOS, configure the audit rules.

$ sudo salt-call state.sls security/CVM/auditCVM

2. For Prism Central, configure the audit rules.

$ sudo salt-call state.sls security/PCVM/auditPCVM

3. For Files, configure the audit rules.

$ sudo salt-call state.sls security/AFS/auditAFS

4. For AHV, configure the audit rules.

$ sudo salt-call state.sls security/KVM/auditKVM