Siemens SIMATIC NET Manual page 275

Registering the OPC Scout as Client
The OPC Scout is an OPC client that you will find in DCOM as a registered object.
If you display the properties of the OPC Scout application DCOM, "None" is
displayed as the authentication level. The default setting therefore assumes an
open system and assumes that the user will adapt the settings when higher
security is required.
Commissioning PC Stations - Manual and Quick Start
Release 5/2005
C79000-G8976-C156-07
18 DCOM Settings with the dcomcnfg System Program
275