The Slave outstation (ClearSCADA) can log information about both successful and unsuccessful authentications and Session Key Changes. (To help protect against ‘denial of service’ attacks, the Slave outstation (ClearSCADA) will transmit only a limited number of error messages before ceasing to send such messages (see Specify the Maximum Error Count).)
Use the field(s) within the Alarm/Event Logging section of the DNP3 Slave Outstation Form’s Security tab to define the priority that ClearSCADA assigns to the authentication and key change information that it logs for this Slave outstation.
- Severity—Use this combo box to specify the priority that is assigned to the alarms and events that ClearSCADA logs in relation to authentications and Session Key Changes.
- ClearSCADA assigns this priority to the:
- events that it logs for successful authentications
- alarms that it logs for any unsuccessful authentications and any authentication errors that it has received.
- (If required, you can select ‘None’ to set ClearSCADA so that it does not log any messages related to successful and unsuccessful authentications. However, we recommend that you choose one of the other Severity settings so that there is a record of authentications).
- For further information, see Defining Severities in the ClearSCADA Guide to Core Configuration.
- Area of Interest—If the Area of Interest feature is enabled on your system, an Area of Interest field is displayed within the Alarm/Event Logging section of the tab. Use the field to specify the area of interest with which any authentication and Session Key Change alarms and events are associated (see Assign a Different Area of Interest to an Item’s Alarms and Events in the ClearSCADA Guide to Core Configuration).
- For further information on the Area of Interest feature, see Restrict Alarm and Event Access to Specific Areas of Interest in the ClearSCADA Guide to Core Configuration.