在Windows上连接Jenkins从属代理失败，连接超时。

环境：Windows Server 2003 R2 Java6

掌握：Linux从属：Windows

我尝试将其同时运行为jnlp和java -jar cmd，但始终失败。

INFO: Connecting to [ec2-machine_url]:4317
5 (retrying:2)
java.net.ConnectException: Connection timed out: connect
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:529)
        at java.net.Socket.connect(Socket.java:478)
        at java.net.Socket.<init>(Socket.java:375)
        at java.net.Socket.<init>(Socket.java:189)
        at hudson.remoting.Engine.connect(Engine.java:304)
        at hudson.remoting.Engine.run(Engine.java:193)