FAQ: Database Authentication
(Doc ID 2721097.1)
Last updated on JULY 21, 2021
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 and later
Information in this document applies to any platform.
This note tries to answer some of common Database authentication questions. It provides a "fast track" to set up and debug ORA errors with Database authentication, however, this is not meant as an exhaustive replacement of the official documentation.
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In this Document
|1. Why Can I Login AS SYSDBA With Any Username and Password?|
|2. Can SYS password be changed using ALTER USER command?|
|3. Is it supported to use OPS$ in 12c and above Database versions?|
|4. How to restrict Database access through specific application or tool?|
|5. How to restrict remote OS authentication?|
|6. What Oracle client version can connect to What Oracle Database version?|
|7. How to configure CMU Centrally Managed User authentication?|
|8. How to implement implement Active Directory authentication for Database users?|
|9. How to do proxy authentication?|
|10. Why Database user login fails with ORA-1017 after upgrading to 12c DB?|
|11. How to troubleshoot ORA-1031/ORA-1017 errors with sysdba login?|
|12. Why some Users have null value in sys.user$.password column?|
|13. How to store oracle database user's password safely in a wallet? How to do password authentication in script without exposing the password in trace/log files?|
|14. Why Expdp/Impdp doesn't work with OS or External Password Store authentication?|
|15. Why Database user logins are slow / taking more time to connect?|
|16. Why DBA_USERS.ACCOUNT_STATUS shows LOCKED instead of LOCKED(TIMED), after FAILED_LOGIN_ATTEMPTS Is Breached?|
|17. Why connection on Standby DB fails with 'ORA-28000: the account is locked', but the account_status is OPEN?|
|18. How to change Oracle owner from Local System account to Domain user account in Oracle Database server on Windows OS?|
|19. Why the Database user password change is failing with error 'ORA-00604: Error Occurred At Recursive SQL Level 1'?|
|20. Why ptime, expiry_date is not updated for SYS user after applying July 2018 or later RU / PSU / DBBP ?|
|21. What is schema-only accounts?|