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Cannot Connect to the Database Server from the Data Link Server


Service Data (Backend Services)
Feature Data Connectors


When configuring a data connector to a database that requires the Data Link Server, an error occurs after clicking the Test button.

At the same time, opening the Data Link Server URL in a web browser returns Result: OK.

Error Message

Data Link Server Error: Cannot connect to database. [Telerik Platform] The connection to the host [hostname], named instance [instance name] failed. Error: [message]. Verify the server and instance names and check that no firewall is blocking UDP traffic to port 1434. For SQL Server 2005 or later, verify that the SQL Server Browser Service is running on the host.


The error signifies that the Data Link Server cannot connect to the database even though the connection between Telerik Platform and the Data Link Server is successful.


Ensure that the supplied connection string is in the correct format for the respective database server:

  • Microsoft SQL Server



  • Oracle



  • MySQL Enterprise



  • PostgreSQL



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