ORA-28040: No matching authentication protocol : Oracle 12c Upgrade

Question

We have migrated our Oracle database to 12c from 11g. We have a legacy application running in Java 1.5 and using ojdbc14.jar.

Our application is not able to create c

Answer 1

I had the same error with 2 different applications recently:

1. a Java 7 app on Tomcat 7 using odbc6.jar with Oracle 12 c database.
2. a legacy ASP application with Oracle 12 c database.

The second solution mentioned in the same post you referred to - worked well for us.

Workaround: Set SQLNET.ALLOWED_LOGON_VERSION=8 in the oracle/network/admin/sqlnet.ora file.

We worked with our DBAs to set the above option on the sqlnet.ora on the database server. This resolved our issue. I hope it helps someone.