http://hunt1574.blog.51cto.com/1390776/857841
1、官方说明：
SQLNET.AUTHENTICATION_SERVICES
Purpose
Use the parameter SQLNET.AUTHENTICATION_SERVICES to enable one or more authentication services. If authentication has been installed, it is recommended that this parameter be set to either none or to one of the authentication methods.
Default
None
Values
Authentication Methods Available with Oracle Net Services:
· none for no authentication methods. A valid username and password can be used to access the database.
· all for all authentication methods
2、测试：
可以通过对SQLNET.AUTHENTICATION_SERVICES值进行修改查看其影响。
l WINDOWNS:
A. 无sqlnet.ora文件：
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>dir sqlnet.ora
驱动器 E 中的卷没有标签。
卷的序列号是 1CF8-89BB
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN 的目录
找不到文件
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on 星期二 5月 8 20:45:35 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-01031: 权限不足
请输入用户名:
B. SQLNET.AUTHENTICATION_SERVICES=（NONE）
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>dir sqlnet.ora
驱动器 E 中的卷没有标签。
卷的序列号是 1CF8-89BB
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN 的目录
2012-05-08 20:48 266 sqlnet.ora
1 个文件 266 字节
0 个目录 1,969,827,840 可用字节
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>type sqlnet.ora
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES = (NONE)
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on 星期二 5月 8 20:48:53 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-01031: 权限不足
请输入用户名:
C. SQLNET.AUTHENTICATION_SERVICES=（ALL）
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>type sqlnet.ora
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES = (ALL)
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on 星期二 5月 8 20:51:28 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-12641: 验证服务无法初始化
请输入用户名:
D. SQLNET.AUTHENTICATION_SERVICES=（NTS）
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>type sqlnet.ora
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES = (NTS)
E:\oracle\product\10.2.0\db_1\NETWORK\ADMIN>sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on 星期二 5月 8 20:53:49 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
连接到:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
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