Good day. If i do sqlplus user/oracle@db
i have successfull connection with db.
If i do sqlplus user/oracle@db as sysdba
i have error ORA-01017.
But at the server this command executes successfully.
My tnsnames.ora:
db =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.175)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
Also i can't do sqlplus /@db as sysdba
. And after sqlplus user@db as sysdba
i enter a password and have this error too. At the server this executes without errors. What is the problem?
Oracle VirtualBox with Win2008, Oracle 12c
You can use as sysdba
only if permission has been granted. Run
GRANT SYSDBA TO user;
in order to permit that.
sqlplus /@db as sysdba
is not possible from a remote machine - this would open the database to entire world where everybody could connect with SYSDBA privileges without any password!
sqlplus /@db as sysdba
is allowed only from local machine because there you are already authenticated (typically) as OS-User "oracle".
It is definitively possible to connect as SYSDBA from a remote machine, as you were doing: specifying a password, and not relying on the OS authentication mechanism (the operative system auth is not involved in the course of a remote authentication such this).
Only, you have to activate the password-file mechanism (that is disabled by default).
To do so, change the value of the parameter remote_login_passwordfile
to either shared
or exclusive
. If it is shared
it works for all databases run on that machine and can only contain the SYS
user (while if is it exclusive
it can contain any user and its scope is the target database).
Important : users are added to the password file only after the password-file was enabled and after they're granted the SYSDBA
or sysoper
privilege; ie pre-existing users won't be automatically added (!), you have to re-grant the SYSDBA
or SYSOPER
role to them.
Finally this view lets you peek at the logical content of the password file
select * from v$pwfile_users;
See Creating and Maintaining a Password File for more details.
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