Kerberos Authentication Fails With ORA-12638 On Windows 2008 R2
Last updated on DECEMBER 03, 2017
Applies to:Advanced Networking Option - Version 220.127.116.11 and later
Information in this document applies to any platform.
***Checked for relevance on 24-Oct-2012***
A 18.104.22.168 client running on Windows 2008 R2 is not able to connect using kerberos.
SQL*Plus: Release 22.214.171.124.0 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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