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Java - problems with dynamic port forwarding

Posted: 05/20/2014 11:34:59
by  Max
Hello, I am trying to use SecureBlackbox to do dynamic port forwarding. However, I cannot seem to be able to create a local SOCKS server. Here is my code:

        TElSSHLocalPortForwarding Client;
        int SSHPort, forwardedPort;
        String host, username, password;
        Client = null;
        SSHPort = 22;
        forwardedPort = 9150;
        host = "<SSH server>";
        username = "<login>";
        password = "<password>";
        try {
            Client = new TElSSHLocalPortForwarding();


            Client.SetOnKeyValidate(new TSSHKeyValidateEvent(new TSSHKeyValidateEvent.Callback() {
                public boolean TSSHKeyValidateEventCallback(TObject arg0, TElSSHKey arg1) {
                    System.out.println("Server key received");
                    return true;
        } catch (Exception exc) {
            System.out.println("BlackBox SSH: " + exc.toString());

        BufferedReader reader;
        try {
            HttpsURLConnection con = connectFunctions.request("https://google.com", "GET", null, "", null, "", connectFunctions.connectToProxy("" + forwardedPort, "socks"));
            reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
            for (String line; (line = reader.readLine()) != null;){
        } catch (java.io.IOException exc) {
            System.out.println("Connection: " + exc.toString());

As you see, I'm trying to create a dynamic port forwarding connection to the server and then connect to the created local SOCKS port to with HttpsURLConnection. However, this doesn't work. It seems that the SOCKS server wasn't up. The error gets thrown up in the second try block on reader = new BufferedReader(new InputStreamReader(con.getInputStream())); and it is java.net.SocketException: Connection refused: connect.
Any clue on what might be wrong with my code? I thought I followed the sample code more or less well... =(
Posted: 05/20/2014 11:49:09
by Eugene Mayevski (Team)

We don't sell our software to russia.

Sincerely yours
Eugene Mayevski



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