至此，我们已经实现不用os认证（sqlplus “/ as sysdba”的方式登录不了）。那么我们怎么限制网络方面利用sysdba远程登录呢？我们可以设置初始化文件中的REMOTE_LOGIN_PASSWORDFILE=none。

注重，当REMOTE_LOGIN_PASSWORDFILE=none时，这个参数生效需要重启数据库，并且，一旦启用这个参数，将使用操作系统认证，不使用口令文件。因此假如REMOTE_LOGIN_PASSWORDFILE=none且SQLNET.AUTHENTICATION_SERVICES= none这个时候数据库是无法登录的。

[coolcode lang=”sql” linenum=”off”]

D:\oracle\ora92\database>sqlplus “sys/change_on_install as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on Sat May 17 01:28:58 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

Connected to:

Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production

With the Partitioning, OLAP and Oracle Data Mining options

JServer Release 9.2.0.1.0 - Production

sys@ORALOCAL(192.168.50.29)> show parameter remote_login

NAME TYPE VALUE

———————————— ———– ——————————

remote_login_passwordfile string EXCLUSIVE

sys@ORALOCAL(192.168.50.29)> alter system set remote_login_passwordfile=none scope=spfile;

System altered.

Elapsed: 00:00:00.01

sys@ORALOCAL(192.168.50.29)> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

sys@ORALOCAL(192.168.50.29)> startup

ORA-01031: insufficient privileges

sys@ORALOCAL(192.168.50.29)>exit

C:\Documents and Settings\Administrator>sqlplus “/ as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on Sat May 17 08:26:43 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

ERROR:

ORA-01031: insufficient privileges

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

C:\Documents and Settings\Administrator>sqlplus “sys/change_on_install as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on Sat May 17 08:26:53 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

C:\Documents and Settings\Administrator>

C:\Documents and Settings\Administrator>sqlplus “sys/change_on_install@oralocal as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on Sat May 17 08:27:03 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

C:\Documents and Settings\Administrator>

[coolcode]

这里我们看到由于启用了REMOTE_LOGIN_PASSWORDFILE=none，使用os认证，不用密码文件认证，必须将SQLNET.AUTHENTICATION_SERVICES= none取消，不然是无法登录。我们改成SQLNET.AUTHENTICATION_SERVICES= （NTS）后再次测试。

[coolcode lang=”sql” linenum=”off”]

### 非oracle软件安装软件用户：###

C:\Documents and Settings\hejianmin>sqlplus “/ as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on Sat May 17 20:15:13 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

ERROR:

ORA-01031: insufficient privileges

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

C:\Documents and Settings\hejianmin>

C:\Documents and Settings\hejianmin>sqlplus “sys/change_on_install as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on Sat May 17 20:15:30 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

ERROR:

ORA-01031: insufficient privileges

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

C:\Documents and Settings\hejianmin>

C:\Documents and Settings\hejianmin>sqlplus “sys/change_on_install@oralocal as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on Sat May 17 20:15:42 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

ERROR:

ORA-01031: insufficient privileges

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

Enter user-name:

ERROR:

ORA-01017: invalid username/password; logon denied

SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

C:\Documents and Settings\hejianmin>

### oracle 软件安装用户 ####

C:\Documents and Settings\Administrator>sqlplus “/ as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on 星期六 5月 17 20:19:13 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

连接到:

Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production

With the Partitioning, OLAP and Oracle Data Mining options

JServer Release 9.2.0.1.0 - Production

sys@ORALOCAL(192.168.0.29)> exit

从Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production

With the Partitioning, OLAP and Oracle Data Mining options

JServer Release 9.2.0.1.0 - Production中断开

C:\Documents and Settings\Administrator>sqlplus “sys/change_on_install as sysdba”

SQL*Plus: Release 9.2.0.1.0 - Production on 星期六 5月 17 20:19:33 2008

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.