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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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