Kerberos Authentication Fails With ORA-12638 On Windows 2008 R2
(Doc ID 1225063.1)
Last updated on JANUARY 02, 2020
Applies to:Advanced Networking Option - Version 188.8.131.52 and later
Information in this document applies to any platform.
***Checked for relevance on 24-Oct-2012***
A 184.108.40.206 client running on Windows 2008 R2 is not able to connect using kerberos.
SQL*Plus: Release 220.127.116.11.0 Production on Tue Sep 7 10:07:51 2010
Copyright (c) 1982, 2010, Oracle. All rights reserved.
ORA-12638: Credential retrieval failed
This is happening only when SQLNET.KERBEROS5_CC_NAME = OSMSFT://. If the kerberos tickets are requested manually and stored in a file (SQLNET.KERBEROS5_CC_NAME = <file>) everything works as expected. Furthermore the problem cannot be reproduced on Windows 2000 or Windows 2003.
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