Error "ORA-28040: No matching authentication protocol" After Database Upgrade to 12c
(Doc ID 755605.1)
Last updated on MARCH 04, 2024
Applies to:
Oracle Net Services - Version 12.2.0.1 to 12.2.0.1 [Release 12.2]JDBC - Version 10.1.0 to 10.2.0.5
Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Oracle WebLogic Server - Version 12.2.1.0.0 to 12.2.1.0.0 [Release 12c]
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
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |