AWS上的SQL服务器的JDBC连接超时

Question

我在亚马逊云上运行了一个SQL服务器。我有一个安全组附加到实例，为每个人打开了入站端口。以下是规则配置，如

我的JDBC连接字符串如下所示。

jdbc:sqlserver://x.x.x.x;databasename=CDS_NY

我在这里使用了实例的publicIP。我的java客户端无法与以下错误建立连接。我在这做错了什么？

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host x.x.x.x, port 1433 has failed. Error: "connect timed out. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
    at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190)
    at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:241)
    at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2243)
    at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:491)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1309)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:991)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:827)
    at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1012)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at com.wilhelmina.reports.Main.getConnection(Main.java:54)
    at com.wilhelmina.reports.Main.main(Main.java:30)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)