DCOM Configuration Recommendation€¦ · Figure 3: Enabling Distributed COM from the My Computer Properties dialog box. All other settings in the Default Properties tab must match

DCOM – Configuration Recommendation GeoGraphix Discovery Project Server | Microsoft Windows 10 Professional

Systems

LMKR GeoGraphix Technical Support Team

June 22, 2020

WHITEPAPER

2

DCOM – Configuration Recommendation

WHITEPAPER

GeoGraphix® is a registered trademark of Landmark Graphics Corporation. The LMKR Logo is the trademark of LMKR Holdings.

GVERSE® is a trademark of LMKR. LMKR Holdings is the exclusive world-wide licensor and distributor of GeoGraphix® software.

Introduction

The Microsoft Component Object Model (COM) is a platform-independent, distributed, object-oriented,

interactive system for creating binary software components. The Distributed Component Object Model

(DCOM) allows applications to be distributed across locations. The DCOM wire protocol ensures

transparency and provides support for reliable, secure, and efficient communication between COM

components.

For more information, please refer to "Component Object Model" on Microsoft's website.

Why these Settings?

GeoGraphix Discovery uses a peer-to-peer model for communication. What this means is that all systems, regardless of the operating system type, are both clients and servers. Such changes are required to be made to any machine that will operate as a server.

Symptoms this Document Applies To

• GeoGraphix Discovery users can view the project server under Network in ProjectExplorer while

logged in to the workstation but cannot view details by clicking on the plus sign adjacent to it.

Note: Domain Authentication or Workgroup User Name and Password Distribution have already been

addressed. The GeoGraphix Project Home folder, NTFS folder and file permissions are set up

appropriately and are correct.

• If GeoGraphix Discovery users at the workstations cannot view the project server at all, then

either the Windows Firewall or a third party security software program at the client workstation

is blocking access to the project server and requires configuration, and/or the revisions of

Discovery in the GeoGraphix environment do not match.

3


WHITEPAPER



Additional Information (from the MSDN website)

By default, Windows 10 Professional computer restriction settings are:

Permission Administrator Distributed COM Users (Built in Group) Everyone Anonymous

Launch Local Launch

Local Activation

Remote Launch

Remote Activation

Local Launch

Local Activation

Remote Launch

Remote Activation

Local Launch

Local

Activation

N/A

Access N/A Local Access

Remote Access

Local Access

Remote

Access

Local Access

Remote Access

Note: This document is based on these default settings.

Distributed Component Object Model (DCOM) Setup

(This section does not discuss utilizing the local Distributed COM Users group. To learn more about

using this group, please refer to Microsoft's website.)

1. To open Component Services, click on the Windows Search menu bar and enter

dcomcnfg in the text box.

4


WHITEPAPER



Figure 1: Running dcomcnfg from the Search menu bar.

2. The Component Services window displays. Right-click My Computer and then select

Properties.

5


WHITEPAPER



Figure 2: The Component Services window.

3. The My Computer Properties dialog box displays. Click the Default Properties tab and ensure the Enable Distributed COM on this computer is enabled.

6


WHITEPAPER



Figure 3: Enabling Distributed COM from the My Computer Properties dialog box.

All other settings in the Default Properties tab must match the screenshot above. Different

settings are beyond the scope of this document.

4. Click the COM Security tab and then click Edit Limits in the Access Permissions section.

7


WHITEPAPER



Figure 4: The COM Security tab of the My Computer Properties dialog box.

5. The Access Permissions dialog box displays. Add appropriate GeoGraphix Discovery user groups

or individual user names. Select Allow for Local Access and Remote Access in the Permissions

section for each object you add.

You can apply these settings to all groups and user names simultaneously by selecting the group

Everyone from the Groups or user names section, and select the Allow check box for Local

Access and Remote Access.

6. Click OK after making desired changes.

8


WHITEPAPER



Figure 5: The Access Permission dialog box.

Warning! You should not remove or modify any other settings for other users or groups. If you

add a GeoGraphix user group, do not remove the Everyone group. Details about this are beyond the scope of this document.

7. Click the COM Security tab and then click Edit Limits in the Launch and Activation

Permissions section.

9


WHITEPAPER



Figure 6: The COM Security tab of the My Computer Properties dialog box.

8. The Launch and Activation Permissions dialog box displays. Add appropriate GeoGraphix

Discovery user groups or individual user names. Select Allow for Local Launch, Local Activation

and Remote Activation in the Permissions section for each object you add.

You can apply these settings to all groups and user names simultaneously by selecting the group

Everyone from the Groups or user names section, and select the Allow check box for Local

Launch, Local Activation and Remote Activation.

9. Click OK after making desired changes.

10


WHITEPAPER



Figure 7: The Launch and Activation Permission dialog box.

Warning! You should not remove or modify any other settings for other users or groups. If you

add a GeoGraphix user group, do not remove the Everyone group. Details about this are beyond

the scope of this document.

10. Click OK again to return to the Component Services window. Click DCOM Config in My

Computer and then right-click GeoSync.exe. Click Properties.

11


WHITEPAPER



Figure 8: Selecting GeoSync Properties from the Component Services window.

11. The GeoSync Properties dialog box displays. Click the Security tab and select Customize in

the Launch and Activation Permissions section. Click Edit in the Launch and Activation

Permissions section.

12


WHITEPAPER



Figure 9: The Security tab of the GeoSync Properties dialog box.

12. The Launch and Activation Permission dialog box displays. Add appropriate GeoGraphix

Discovery groups or user names and select Allow for Local Launch, Local Activation and Remote

Activation in the Permissions section for each object you add. Click [OK].

Note: You can apply these settings to all groups and user names by adding Everyone to the Groups or

user names section, and then selecting the Allow check box for Local Launch, Local Activation and

Remote Activation.

13


WHITEPAPER



Figure 10: The Launch and Activation Permission dialog box.

Warning! You should not remove or modify any other settings for other users or groups. This is

beyond the scope of this document.

13. The GeoSync Properties dialog box displays. Click the Security tab and then select

Customize in the Access Permissions section. Click Edit.

14


WHITEPAPER




14. The Access Permission dialog box displays. Add appropriate GeoGraphix Discovery groups and

user names and select Allow for Local Access and Remote Access in the Permissions section for

each object you add. Click OK.

You can apply these settings to all groups and user names simultaneously by adding Everyone to the

Groups or user names section, and then selecting the Allow check box for Local Access and Remote

Access.

15


WHITEPAPER



Figure 12: The Access Permission dialog box.

15. The GeoSync Properties dialog box displays. Click the Security tab and then select Customize in

the Configuration Permissions section. Click Edit.

16


WHITEPAPER




16. The Change Configuration Permission dialog box displays. Add appropriate GeoGraphix

Discovery groups and user names and select Allow for Full Control and Read (if not checked

already) in the Permissions section for each object you add. Click OK.

You can apply these settings to all groups and user names simultaneously by adding Everyone to the

Groups or user names section, and then selecting the Allow check box for Full Control and Read (if not

checked already).

17


WHITEPAPER



Figure 14: The Change Configuration Permission dialog box.

17. The GeoSync Properties dialog box displays. Click Apply and OK to exit the GeoSync Properties

dialog box. Close the Component Services window.

18. DCOM configuration is complete. A restart of the workstation/server should not be necessary.

Documents

DCOM Configuration Recommendation€¦ · Figure 3: Enabling Distributed COM from the My Computer Properties dialog box. All other settings in the Default Properties tab must match