How to fix the Oracle error ORA-12564: TNS:connection refused?

In this post, you’ll learn more about the Oracle ErrorORA-12564: TNS:connection refused with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12564: TNS:connection refused

Reason for the Error ORA-12564: TNS:connection refused

The connect request was denied by the remote user (or TNS software).

How to fix the Error ORA-12564: TNS:connection refused ?

You can fix this error in Oracle by following the below steps

Not normally visible to the user. For further details, turn on tracing and reexecute the operation.