Step 2 - Configuring DCOM Security Options for OPCENUM for Windows XP & 2003 Operating Systems

The next step is to locate OPCEnum in the list of COM components. Simply click on, or expand the "DCOM Config" section to show the objects available to configure:

Locate OPCEnum, and then open it's properties by simply right-clicking on it, and choosing "Properties" from the menu.

General Tab

The General Tab has only one option, and that is the "Authentication level".

For each of use, you can select "None" as your option.

Location Tab

OPCEnum is a program that scans your registry for a list of OPC Servers on your computer.

OPCEnum needs to run on the computer where it resides.. therefore the option of choice here is to check "Run application on this computer".

Security Tab

There are 3 options in the Security tab that need to be set.

Launch Permissions:
Select the option "Use Default".

Access Permissions:
Select the option "Use Default".

Configuration Permissions:
Select the option "Customize ", and then click the "Edit" button.

A window will open allowing to specify the accounts that do/don't have configuration permissions, simply add the same:

• Network
• Interactive
• System
• Everyone
• Guests
• Anonymous
• IUSR_<computer-name> *
• IWAM_<computer-name> *

Ensure that all of the accounts above receive "Full Control" rights.

* If you are using IIS (Internet Information Services) as an OPC Client.

Identity Tab

Use either the Interactive or System account.

Click OK to save and close the OPCENUM options window.

Next Step > Configuring OPC Server