ora-12546

问题描述：sqlplus / as sysdba连接oracle时显示错误如下：

C:\Users\Administrator>sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on 星期三 6月 14 13:53:01 2017

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

ERROR:

ORA-12546: TNS: 权限被拒绝

Enter user-name:

C:\Users\Administrator>

原因描述：是由于sqlnet.ora里面的信息不全

解决方法：数据库所在的服务器重启

注：

（1）错误时的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)

（2）无错误时的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)

NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES, HOSTNAME)