Why are SQL Server audit logs not collected?

Why are SQL Server audit logs not collected?

Case 1: Is Advanced Auditing enabled?  

  1. Open EventLog Analyzer and go to Settings > Database Audit > SQL Servers.

  2. The DDL/DML Monitoring column should show Manage for the required instance. If it says Not configured, then edit the required instance, and enable Advanced Auditing.

 

Note:

  1. Advanced Auditing always needs to be enabled for successful database auditing.

  2. Advanced Auditing needs to be enabled only for the initial configuration of the DDL/DML Monitoring and Column Integrity Monitoring features.

 

 

Case 2: Are the audit policies configured?  

  1. Open SQL Server Management Studio in the Windows machine in which SQL Server is installed, and connect to the required instance.

  2. Click the Security option.

  3. The Server Audit Specifications section should have an audit specification with a name starting with ME_LOG360. Ensure it is enabled.

  4. Double-click the audit specification:
          a. Find the name of the mapped audit in the Audit field. An audit with the same name should be present under the Audits section (Security > Audits). Ensure it is enabled.
          b. The Audit Action Type should contain the following policies:

                    

        1. SCHEMA_OBJECT_ACCESS_GROUP

        2. DATABASE_CHANGE_GROUP

        3. SCHEMA_OBJECT_CHANGE_GROUP

        4. DATABASE_OBJECT_CHANGE_GROUP

        5. DATABASE_OBJECT_ACCESS_GROUP

        6. DATABASE_PRINCIPAL_CHANGE_GROUP

        7. SERVER_PRINCIPAL_CHANGE_GROUP

        8. SERVER_OBJECT_CHANGE_GROUP

        9. APPLICATION_ROLE_CHANGE_PASSWORD_GROUP

        10. LOGIN_CHANGE_PASSWORD_GROUP

        11. USER_CHANGE_PASSWORD_GROUP

        12. BACKUP_RESTORE_GROUP

        13. SERVER_ROLE_MEMBER_CHANGE_GROUP

        14. DATABASE_ROLE_MEMBER_CHANGE_GROUP

        15. DATABASE_OBJECT_PERMISSION_CHANGE_GROUP

        16. DATABASE_PERMISSION_CHANGE_GROUP

        17. SCHEMA_OBJECT_PERMISSION_CHANGE_GROUP

        18. SERVER_OBJECT_PERMISSION_CHANGE_GROUP

        19. SERVER_PERMISSION_CHANGE_GROUP

        20. DATABASE_OBJECT_OWNERSHIP_CHANGE_GROUP

        21. DATABASE_OWNERSHIP_CHANGE_GROUP

        22. SCHEMA_OBJECT_OWNERSHIP_CHANGE_GROUP

        23. SERVER_OBJECT_OWNERSHIP_CHANGE_GROUP

        24. AUDIT_CHANGE_GROUP

        25. TRACE_CHANGE_GROUP

        26. SERVER_STATE_CHANGE_GROUP

        27. SUCCESSFUL_LOGIN_GROUP

        28. FAILED_LOGIN_GROUP

        29. LOGOUT_GROUP

    Case 3: Are EVENTID=33205 events logged in the Event Viewer?  

    1. In the target Windows machine where SQL Server is installed, open the Event Viewer > Application, and check for events with EVENTID=33205.

    2. If events with EVENTID=33205 are not present, simulate some events, e.g.: log in to the SQL Server instance using SQL Server Management Studio. A successful login will generate an event with EVENTID=33205 and action_id=LGIS, and a failed login will generate an event with EVENTID=33205 and action_id=LGIF.

              a. If events still don't appear check Case 4: Is the Event Viewer holding events for more than the monitoring interval (default: 10 minutes)?

     

    Case 4: Is the Event Viewer holding events for more than the monitoring interval (default: 10 minutes)?  

    Are events in the Event Viewer getting overwritten with new events before EventLog Analyzer can collect them? Ensure that the time difference between the first and the last log of Event Viewer is greater than the monitor interval. If not, increase the size of the Security category.

     

    Case 5: Are any Log Collection Filter profiles in EventLog Analyzer filtering out the logs?  

    In EventLog Analyzer, go to Settings > Admin Settings > Log Collection Filters, and ensure that no filter profiles are configured to drop the expected logs.



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