12c: ORA-28040 After Upgrade: No Matching Authentication Protocol (Doc ID 1957995.1)

Last updated on JULY 25, 2017

Applies to:

Oracle Net Services - Version 12.1.0.1 to 12.2.1.2.0 [Release 12.1 to 12.2]
Oracle Database - Enterprise Edition - Version 12.2.0.1 to 12.2.0.1 [Release 12.2]
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Information in this document applies to any platform.

Symptoms

Following an upgrade to the version 12c database, the following errors are thrown when attempting to connect from remote
clients:


ORA-28040: No matching authentication protocol exception

Changes

 This is a new installation of the version 12 database.

Cause

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