ORA-28040: No matching authentication protocol Oracle

Question

I am trying to connect oracle12C but not able to connect.

i have tried with previous answer: ORA-28040: No matching authentication protocol: Oracle 12c Upgrade ?

using ojdbc6.jar. But it is not worked

Next i have added following snippet in sqlnet.ora file

SQLNET.ALLOWED_LOGON_VERSION=10
SQLNET.ALLOWED_LOGON_VERSION_CLIENT=10
SQLNET.ALLOWED_LOGON_VERSION_SERVER=10

Here i tried assigning (10,11,12) but neither of them is working.

Answer 1

Can you try delete the ojdbc14.jar file and use ojdbc6.jar instead

Answer 2

After Lot of debug,

Oracle 12c comes all its older version. If you have installed 11g client first upgrade to 12c. Then all set up need to done. Net manager wont throw ORA-28040: No matching authentication protocol Oracle error and will pass successfully.