12c and Later Releases: ORA-28040 After Upgrade: No Matching Authentication Protocol
(Doc ID 1957995.1)
Last updated on JANUARY 16, 2025
Applies to:
Oracle Net Services - Version 12.1.0.1 to 19.5.0.0.0 [Release 12.1 to 19]Business Intelligence Suite Enterprise Edition - Version 11.1.1.9.180116 to 11.1.1.9.180116 [Release 11g]
Oracle Database - Enterprise Edition - Version 19.3.0.0.0 to 19.3.0.0.0 [Release 19]
Oracle Database - Enterprise Edition - Version 12.1.0.1 and later
Oracle Cloud Infrastructure - Exadata Cloud Service - Version N/A and later
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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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |