我已经在 Windows 2012 Server 机器上安装了 Oracle 12c,并且可以使用在服务器本身上运行的 SQL Developer 很好地连接到我用它创建的数据库。但是,我无法从远程机器连接到同一个数据库,这是我想要做的。我使用 SQuirreL、SQL Developer,甚至运行 Java 代码从外部客户端连接到盒子,每次尝试都会超时 - 所以我知道我的连接 url 正确(jdbc:oracle:thin:@192.168.0.105: 1521:orcl),并且服务器本身有问题。
是否有一组指令可以让我指出以允许从外部访问我的数据库?
这是我在服务器上的 listener.ora 文件内容:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\app\dbadmin\product\12.1.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:C:\app\dbadmin\product\12.1.0\dbhome_1\bin\oraclr12.dll")
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.105)(PORT = 1521))
)
)
我得到的错误如下(超时错误,如上所述):
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:673)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:715)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:385)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:30)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:564)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at Launcher.main(Launcher.java:47)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:445)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:464)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:594)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:229)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1360)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:486)
... 7 more
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:162)
at oracle.net.nt.ConnOption.connect(ConnOption.java:133)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:411)
... 12 more
这个问题已经在 StackOverflow 上被问过一次或两次,但我已经尝试了我找到的大部分答案,但我仍然无法从外部连接到我的 Oracle 12c 数据库。我尝试过的 sql*plus 中有一些命令(http://technology.amis.nl/2013/06/26/oracle-12c-getting-started-with-db-express/)仍然没有成功. 我确信这只是一些设置,如防火墙或其他类似的设置,但如果可能的话,希望有经验的人提供反馈。
非常感谢任何帮助。