允许外网访问：
1.将oracle主程序和oracle监听添加到windows防火墙例外。

2.配置监听器
或者修改listener.ora为如下文件（1.修改SID_DESC  2. (ADDRESS = (PROTOCOL = TCP)(HOST =xiong-PC)(PORT = 1521))）



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

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST =127.0.0.1)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST =xiong-PC)(PORT = 1521))
    )
  )