How to restrict OFS-DCOM connection to a specific user?
OFS Server can operate in remote mode (the OPC client and the server are on different machines connected by DCOM generally via TCP-IP)
To allow the connection for only a specific user, the following setting can be applied:
Steps to follow:
- From the Start menu, choose Run and run DCOMCNFG
- Expand Console Root/Component Services/Computers/My Computer and
- right-click My computer to open the My Computer Properties dialog.
- Click the Default Properties tab.
- The following parameters must be set:
- Enable Distributed Com on this computer must be checked,
- Default Authentication Level is set to Connect,
- Default Impersonation Level is set to Identify.
- Click the COM Security tab.
- Click the Edit Defaults in Access Permissions
- Click Add, add the user required (example: L3), click OK.
- Check that permissions for user required are:
- Local access: Allow checked.
- Remote access: Allow checked
- Delete « Everyone » if it exists
- Delete « INTERACTIVE » and « NETWORK » if it exists
- Click the Edit Defaults in Launch and Activation Permissions
- Click Add, add the user required (example: L3), click OK.
- Check that permissions for user required are:
- Local Launch: Allow checked.
- Remote Launch: Allow checked.
- Local Activation: Allow checked.
- Remote Activation: Allow checked.
- Delete « Everyone » if it exists
- Delete « INTERACTIVE » and « NETWORK » if it exists
Product line
OFS 3.63 SP3
Environment
Windows 10
Publicerad för: Schneider Electric Sverige


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