oracle11g本地可以访问但局域网无法访问

　　问题描述，现在有两台电脑 A 和 B ：

　　1）电脑 A 上有 Oracle11G服务端； ip地址 192.168.1.198; 端口1521；

　　2）电脑 A 本机连接数据库正常，可以登录及操作等；

　　3）电脑B配置访问电脑A时报错：ORA-12541:TNS:无监听程序

　　报这种错的话，网上有说法，说是防火墙没关，或者是服务端服务没启好等，按本人的实际情况解说：因为oracle服务端访问配置是需要配置访问地址监听的，具体见Oracle安装路径：% product\11.2.0\dbhome_1\NETWORK\ADMIN\listener.ora，这个是我的oracle监听服务的配置文件，内容如下：

# listener.ora Network Configuration File: E:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = E:\app\Administrator\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:E:\app\Administrator\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.190)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = E:\app\Administrator

View Code

　　这时候我可以采用两种方法来解决：

　　方法一：直接用下面的语句覆盖掉listener.ora中的内容，之后重启oracle和监听器即可。

# listener.ora Network Configuration File: E:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = E:\app\Administrator\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:E:\app\Administrator\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = SKY-20130705VGC)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = E:\app\Administrator