Remote DCOM settings

Cause:

This error message occurs when a Windows workstation fails while scanning. This can be due to the following reasons,

  • a. The login name and password provided for scanning might be invalid in the workstation.
  • b. Remote DCOM option might be disabled in the remote workstation.

Solution:

Step 1:

For Windows workstations “Windows Domain Scan” mode is more efficient than “Network Scan” mode. Configure the proper login credentials for the Domain/Workgroup. Check if the login credentials are provided in correct format.

For login credentials ensure that you haven’t entered the Domain Name along with the Username (i.e. Do not Enter as Domain Name\\Username). It is sufficient if you enter only the Username in the provided text-field.

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Step 2:

Ensure that the login information provided are correct and has administrator privileges in the target computers. To check the validity of the login information, you can execute the following commands in the command prompt of the server:

  • net use \\<RemoteComputerName>\C$ /u:<DomainName\UserName> “<password>”
  • net use \\<RemoteComputerName>\ADMIN$ /u:<DomainName\UserName> “<password>”

NOTE: Replace the relevant value within <>. Supply password within the quotes.

If the above commands succeed and scanning fails, then the problem might be in the DCOM Configurations.

Step 3:

Ensure Remote DCOM is enabled on the target workstations. To Enable DCOM in Windows 2000 Computers,

  1. Select Start > Run
  2. Type DCOMCNFG in the text field
  3. Click Ok.
  4. Select Default Properties tab
  5. Check the box “Enable Distributed COM on this machine”.
  6. Press OK

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To Enable DCOM in Windows XP Computers,

  1. Select Start > Run
  2. Type DCOMCNFG in the text field
  3. Click OK.

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  1. Right Click on Component Services > Computers > My Computer.
  2. Click Properties.

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  1. Select Default Properties tab in the frame that pops
  2. Check the box “Enable Distributed COM in this machine.”

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  1. Press Ok.

Now try scanning the workstation after Enabling Remote DCOM.

Step 4

If scanning fails on enabling remote DCOM, give more DCOM permissions and try scanning the workstation.

  1. Start -> Run -> DCOMCNFG
  2. Choose the DEFAULT PROPERTIES tab
  3. Check the check-box Enable Remote DCOM on this computer
  4. Set the Default Authentication Level as DEFAULT. NONE also can be set.
  5. Set the Default Impersonation Level as IMPERSONATE.

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  1. Now select the DEFAULT SECURITY tab.
  2. Click the Edit Default button under Default Access Permission.

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  1. In the Frame that pops, click the ADD button and add “Everyone” with Allow Access permission.

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  1. Similarly, under the Default Launch Permission add “Everyone” with Allow Launch permission.

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  1. Click OK and now try scanning the workstation.

NOTE: Sometimes DCOM Settings will be effective after restarting the server.

Step 5:

In certain cases, the problem might be due to enabling “Simple File Sharing”. To disable “Simple File Sharing”:

  1. In any of the Windows Folders Click “Tools” > “Folder Options”.

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  1. In the Folder Options window, go to “View” tab.
  2. Un-check “Use simple file sharing”.

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  1. Click OK to save changes.

Step 6:

If the target workstations are Windows XP try modifying the Network Access Security Model.

  1. Go to Control Panel -> Administrative Tools -> Local Security Policy -> Local policies -> Security options.

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  1. Right Click “Network Access: Sharing and security model for local accounts” and then select Properties.

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  1. Choose the option “Classic – local users authenticate as themselves” and apply.

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  1. Restart and scan the workstation.

 

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