network\admin\sqlnet.ora配置

REMOTE_LOGIN_PASSWORDFILE和SQLNET.AUTHENTICATION_SERVICES
REMOTE_LOGIN_PASSWORDFILE参数值为exclusive时，远程能作为sysdba身份登录
SQLNET.AUTHENTICATION_SERVICES=none是oracle认证

参考： http://wenku.baidu.com/view/0b845c51ad02de80d4d840ca.html http://yangzhongfei.blog.163.com/blog/static/4610987520098693213374/