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Error connect client via socket

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I have a program that receives a data package via socket from a client.

The program detects the IP and client port to send to client a mensage confirmation.

But, when the program send the message back into its socket, it receives the following error message:

    Exception in thread "main" 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:339)

The code is as follows:

When try the command     occurs the error message.

NOTE: The server has no enabled Firewall.

What could be going wrong?

Thank you,

Posts: 3572
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There are two issues. First, to get the port for the client you should be calling getPort() - see Error recognizing IP and Port from Client ... . Second, to reply to the client, write to the output stream for the same socket you read from - s.getOutputStream() - don't try and open a new socket connection back to the client (unlikely the client is listening for connections anyway).
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