This topic describes the cause and solution of the message "Instances with internal IP addresses are not allowed" that appears when you test the connectivity to an AnalyticDB database.

Issue

When you test the connectivity to an AnalyticDB database of a data migration task or data synchronization task, the message "Instances with internal IP addresses are not allowed" appears.

Cause

The destination AnalyticDB databases does not support connectivity tests.

Solution

If the destination database is an AnalyticDB database, you can skip the connectivity test and perform subsequent operations. However, you must make sure that the specified username and password are accurate.