Authorization

Authorization verifies permission for OPC Classic clients to perform programmatic calls to the OPC Classic server, and vice versa.

Once an OPC Classic client has been authenticated, DCOM security must determine if that OPC Classic client is authorized to perform programmatic calls to the selected OPC Classic server.

This determination is made by looking at the access control list for the OPC Classic server COM object. This list of users and/or user groups for the OPC Classic server is configured using the DCOMCNFG utility supplied with the Windows operating system.

If the OPC Classic client's user identity is listed on the OPC Classic server's access permissions list, either as a user or as a group member, then the OPC Classic client can access the OPC Classic server.