Audit Access Control Enforcement By auditing access restriction enforcement, changes to application and OS configuration files can be audited. Without auditing the enforcement of access restrictions, it will be difficult to identify attempted attacks and an audit trail will not be available for forensic investigation. Enforcement actions are the methods or mechanisms used to prevent unauthorized changes to configuration settings. Enforcement action methods may be as simple as denying access to a file based on the application of file permissions (access restriction). Audit items may consist of lists of actions blocked by access restrictions or changes identified after the fact.

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In order to view the currently configured flags for the audit daemon, run the following command: sudo grep ^flags /etc/security/audit_control Enforcement actions are logged by way of the 'fm' flag, which audits permission changes, and '-fr' and '-fw', which denote failed attempts to read or write to a file. If 'fm', '-fr', and '-fw' are not listed in the result of the check, this is a finding.