How to fix the Oracle error ORA-28040: No matching authentication protocol?

In this post, you’ll learn more about the Oracle ErrorORA-28040: No matching authentication protocol with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-28040: No matching authentication protocol

Reason for the Error ORA-28040: No matching authentication protocol

No acceptible authentication protocol for both client and server

How to fix the Error ORA-28040: No matching authentication protocol ?

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

Administrator should set SQLNET_ALLOWED_LOGON_VERSION parameter on both client and servers to values that matches the minimum version supported in the system.