WINDWOS 平台:
到oracle的安装目录下 cd %ORACLE_Home%/network/admin目录下,找到一个sqlnet.ora的文件(若没有，可以手工创建)
编辑以下内容:
# 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)
----
注: 若有此文件，默认-www.2cto.com-的是 SQLNET.AUTHENTICATION_SERVICES = (NTS), 此时,只要在其前面增加一个#,
LINUX平台:
到cd $ORACLE_HOME/network/admin目录下:
查看是否有sqlnet.ora文件，若没有手工创建,
[oracle@rh4-db2 admin]$ more sqlnet.ora
# sqlnet.ora Network Configuration File: /ora10g/product/10.2.0/network/admin/sqlnet.ora
# Generated by
Oracle configuration tools.
NAMES.DIRECTORY_PATH= (TNSNAMES)
sqlnet.authentication_services=(none)
作者 coollifer