ORA 28040 no machine authentication protocol Error.
I am trying to connect with Plsql Developer to Oracle databse Oracle 12c in Oracle Linux 7.3 system. However, whenever i run my application i get following exception. Error messages summary : “connect error, ORA-28040: No matching authentication protocol”
Bug number -> 14575666
Solutions 1 :
1. Connect to system with oracle user
2. set SQLNET.ALLOWED_LOGON_VERSION=8 in the sqlnet.ora file.
Solutions 2 :
Plsql developer may have stayed on the old version. Update the Plsql Developer