Error "ORA-28040: No matching authentication protocol" After database upgrade to 12c (Doc ID 755605.1)

Last updated on SEPTEMBER 20, 2017

Applies to:

JDBC - Version 10.1.0 to 12.1.0.2.0
Information in this document applies to any platform.

Symptoms

When using the property "SQLNET.ALLOWED_LOGON_VERSION=10" set in the file sqlnet.ora on the server side, a 10g JDBC thin driver connecting to this 10g oracle database, fails with following errors:

The Network Adapter could not establish the connection
....
ORA-28040: No matching authentication protocol





.

Changes

Database upgrade to latest version, or configuring SQLNET.ORA on the server side.

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms