MSDTC Security Configuration

Error Message

Failed the MSDTC test

The MSDTC transaction manager was unable to pull the transaction from the source transaction manager due to communication problems. Possible causes are: a firewall is present and it doesn't have an exception for the MSDTC process, the two machines cannot find each other by their NetBIOS names, or the support for network transactions is not enabled for one of the two transaction managers:

xx.xx.xxx.xxx, xxxx\qualisystems2016

You should also check Windows Event viewer for more details.

Description

When running the Quali Server configuration wizard, and trying to connect to a database in the Database selection screen, an error message is displayed if there is a security configuration issue.

Possible Causes

Possible reasons for incorrect MSDTC configuration include:

  • MSDTC is not installed.
  • MSDTC is not configured to start automatically in Windows Services.
  • Security configurations of MSDTC are not correctly defined.
  • You did not specify the DB machine's NetBIOS computer name when connecting to the DB.

To run the CloudShell Suite applications, configure MSDTC Security settings on the Quali Server machine and the SQL database machine (or machines in a High Availability deployment).

Solution

Tip: Before performing the below steps, try specifying the DB machine's NetBIOS computer name in the Quali Server Configuration wizard's Database Connection window, so for example, instead of using "dbmachine\dbinstance", use "dbmachine.<NetBIOS-computer-name>\dbinstance". For details, see Configure the SQL Server Database Connection.

To resolve the issue described above, follow these steps:

  1. Ensure that proper Security Settings in Local DTC properties have been selected:
    1. Go to Control Panel > Administrative Tools > Component Services or select Start > Run, type dcomcnfg.exe and press Enter.
    2. From the left navigation tree, drill down to Component Services > Computers > My Computer > Distributed Transaction Coordinator > Local DTC.
    3. Right click Local DTC and select Properties from the context menu.

    4. In the Security tab, select the following checkboxes:

      • Network DTC Access
      • Allow Remote Client
      • Allow Remote Administration
      • Allow Inbound
      • Allow Outbound
      • Enable SNA LU 6.2 Transactions
      • No Authentication Required

    5. Apply the changes and click OK. The service restarts. However, you may have to restart the computer(s).
  2. For all operating systems, define the Distributed Transaction Coordinator service to startup automatically:
    1. Select Start > Run, type services.msc and press Enter.
    2. In the Services window, right-click Distributed Transaction Coordinator, and select Properties from the context menu.
    3. In the Startup type dropdown list, select Automatic.
    4. Click OK to close the Properties window.

Related Topics

Database Prerequisites