You can enable auditing to keep track of security-related events such as authentication failures and refused connections. Logging these events enables you to monitor your cluster for suspicious activity and provides evidence in the event of an attack.

Audit logs are disabled by default. To enable this functionality, you must set xpack.security.audit.enabled to true in elasticsearch.yml.

The audit log persists events to a dedicated <clustername>_audit.json file on the host’s file system (on each node).