解决安装Oracle本地可以访问客户端不能访问

现象：本地需要修改监听为localhost --》win+r--》 sqlplus system/123@xxdb 可以登陆，远程客户端不能登陆；需要将监听修改为IP地址，重启监听；远程可以访问，plsql：192.168.0.111:50000/xxdb,账号:system密码123

解决方案：将tnsnames.ora的HOST改为ip，将listener.ora的HOST改为本机计算机名称。

配置完重启服务OracleServicexxdb

# tnsnames.ora Network Configuration File: d:apporclproduct12.1.0dbhome_1
etworkadmin	nsnames.ora
# Generated by Oracle configuration tools.

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )

xxdb =
  (DESCRIPTION =
    (ADDRESS_LIST =
　　   (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT =1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.111)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = xxdb)
    )
  )

listener.ora  配置完重启监听

# listener.ora Network Configuration File: d:apporclproduct12.1.0dbhome_1
etworkadminlistener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = d:apporclproduct12.1.0dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:d:apporclproduct12.1.0dbhome_1inoraclr12.dll")
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = pc138)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

 配置完成登陆提示 tns连接超时解决方案：

windows servers 2012控制面板--》系统和安全--》Windows防火墙--》高级设置--》左侧 选择 入站规则--》右侧 新建入站规则

规则类型选端口--》TCP 特定端口填1521--》下一步下一步默认，然后填上名称。