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Client Gets ORA-12638 When Kerberos Ticket is not Available (Doc ID 455439.1)

Last updated on FEBRUARY 04, 2022

Applies to:

Advanced Networking Option - Version 8.1.7 to [Release 8.1.7 to 11.2]
Information in this document applies to any platform.
This problem can occur on any platform.


The server has SQLNET.AUTHENTICATION_SERVICES with Kerberos included in the list of authentication devices.  The client is trying to connect through the listener and is providing a password( i.e. sqlplus userid/password@connect).  The Kerberos server is unavailable and as such the client then gets the error ORA-12638.


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