try {
InetAddress theAddress = InetAddress.getByName(host); for (int i = 1; i < 65536; i++) {
Socket connection = null;
connection = new Socket(host, i);
System.out.println("There is a server on port " + i + " of " + host); if (connection != null)
connection.close();
} // end for
} catch (Exception ex) {
System.err.println(ex);
}