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how to reproduce ORA-12638: Credential retrieval failed

449846Aug 10 2005
I need to reproduce Credential retrieval failed to continue my task.

To resolve ORA-12638, we just change sqlnet.ora:
sqlnet.authentication_services=(NTS)
to
sqlnet.authentication_services=(none).

So to reproduce ORA-12638, I set
sqlnet.authentication_services=(NTS) in sqlnet.ora
but sqlplus still can connect to remote database without ORA-12638.

Some metalink artical said that ORA-12638 most like that a client access a database server from a different domain. And our database is also on a domain, so I change my pc from a domain to a workstation, after that then connect using sqlplus again, but still does not work.

any suggestion is welcome

Thanks

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Locked on Sep 7 2005
Added on Aug 10 2005
#general-database-discussions
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