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     Making a SImple Port Scanner In Different languages

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    The Joker

    Posts: 182
    Join date: 2012-06-11
    Age: 24

    PostSubject: Making a SImple Port Scanner In Different languages    Wed Aug 15, 2012 7:39 am

    Lets make a simple port scanner with opens a full TCP connection to detect if a port is open or not.
    This is not the best way to scan because it makes a lot of noise, some other ways are Half TCP (TCP SYN) and TCP FIN.
    Code in python::

    import socket
    i = “″
    for p in range(19, 26):
    spy = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    spy.connect((i, p)
    print p,” Open”
    except :
    print p,”closed”
    It searches from port 19 to 25. The data is hard coded but sys.argv[] can be used to take arguments from command line.. Python is indent sensitive and here I can’t find any [code] tag so if you copy paste the above code it will give errors the indentation should be corrected to work properly.
    Code in Perl::

    use IO::Socket;
    $port = 19;
    while ($port < 26){
    $spy = new IO::Socket::INET (PeerAddr => '',
    PeerPort => $port,
    Proto => 'tcp');
    if ($spy){
    close $spy;
    print "$port -open\n";
    $port = $port + 1;
    print "$port -closed\n";
    $port = $port + 1;

    Code in Ruby::

    require 'socket'
    require 'timeout'
    ports = 19..26
    ports.each do |spy|
    Timeout::timeout(10){"", spy)}
    puts "closed : #{spy}"
    puts "open : #{spy}"
    Code in Java::

    public class javaps {
    public static void main(String[] args)
    String remote = "";
    for (int port = 19; port <= 26; port++) {
    try {
    Socket s = new Socket(remote, port);
    System.out.println("The port " + port + " of " + remote + " is open");
    catch (IOException ex) {
    System.out.println("The port " + port + " of " + remote + " is closed");

    These are just one way of coding port scanners
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