我无法连接到服务器

Question

我必须使用Socket。 我尝试连接到http://ftp.byfly.by并收到错误消息：

       java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at java.net.Socket.<init>(Socket.java:434)
    at java.net.Socket.<init>(Socket.java:211)
    at task4.TestClientSocket.main(TestClientSocket.java:17)



       public static void main(String args[]) throws IOException {
            final String host = "82.209.230.71";
            final int portNumber = 1028;
            System.out.println("Creating socket to '" + host + "' on port " + portNumber);

                Socket socket = new Socket(host, portNumber);
                System.out.println("YEEEEES");

登录名和密码如何？ 我做了本地服务器客户端，但是我不明白它在网络中的工作原理。