You can test the connectivity of a database connection before you start or create a migration. You can get information about the connection and fix any configuration issues before running the migration.

You can diagnose issues with a database connection such as:

• Incorrect IP address and/or port.
• Incorrectly declaring a connection public or private.
• Incorrect, expired, or locked database credentials.
• Missing entries in security lists or NSGs to allow communication with database IP or port.
• Connection failures through FastConnect, VPN, or any other network connectivity issues for your on-premises database.

  Oracle Cloud Infrastructure Database Migration service runs a network connectivity check followed by JDBC Connection or Socket Connectivity using the Database Connection data that you provide.

To test the connectivity of a database connection use either of the following methods:

• From the action menu (three dots), select Test connection.
• Select the database connection, which opens the Database connection details page and click the Test connection button.

The Test connection dialog is displayed.