ERROR: "ORA-28040: No matching authentication protocol"

Error: The following error is coming when trying to connect Oracle 12c database from below Oracle 12c client client 

ERROR: "ORA-28040: No matching authentication protocol"

Reason:

This is an Oracle issue and further inquires should be opened with Oracle support. Here is the information we have and a workaround:

 Bug 14575666

 In 12.1, the default value for the SQLNET.ALLOWED_LOGON_VERSION parameter has been updated to 11. This means that database clients using pre-11g JDBC thin drivers cannot authenticate to 12.1 database servers unless the SQLNET.ALLOWED_LOGON_VERSION parameter is set to the old default of 8.

 This will cause a 10.2.0.5 Oracle RAC database creation using DBCA to fail with the ORA-28040: No matching authentication protocol error in 12.1 Oracle ASM and Oracle Grid Infrastructure environments.

Solution : 

Set SQLNET.ALLOWED_LOGON_VERSION=8 in the oracle/network/admin/sqlnet.ora file. Now reload the listener and try to connect

[oracle@sisdb network]$ cd admin/
[oracle@sisdb admin]$ cat sqlnet.ora 
# sqlnet.ora Network Configuration File: /orasoft/oracle/product/12.2.0.1/db_1/network/admin/sqlnet.ora
# Generated by Oracle configuration tools.

NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES, HOSTNAME)

[oracle@sisdb admin]$ vim sqlnet.ora 

SQLNET.ALLOWED_LOGON_VERSION_SERVER=8


[oracle@sisdb admin]$ lsnrctl reload

LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 20-JAN-2018 13:42:41

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Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=sisdb)(PORT=1521)))
The command completed successfully