Port Scan

[Ashcrow]

#!/usr/bin/perl

use IO::Socket;

$message = "DIE SCUM\n\n\n";
$message2 = "JERK!\n\n\n";

my $socket = IO::Socket::INET-> new (LocalAddr => 'localhost', 
 * * * * * * * * * * * * LocalPort => 23, 
 * * * * * * * * * * * * Listen => 10, 
 * * * * * * * * * * * * Proto => 'tcp') || die $_;

while($con = $socket->accept)
{
 * * *print $con $message;
 * * *$a[0] = $con->peerhost;
 * * *print "CONNECTION from $a[0] \n\n";
 * * *if($a[0] eq $a[1]) { print $con $message2; }
 * * *$a[1] = $a[0];
 * * *close($con);

}

shouldn't this be in the programming forum?

btw, i got one word for u: 8) nmap 8)

[Hamond]

Ashcrow: for us non-programmers, what does that do, and how would some of us use what you put up here?

Python:

#!/usr/bin/env python

from socket import *
import sys, signal



class Scanner:
 def scan(self, host, port):

  if int(port) > 65535:
   limit = 65536
  else:
   try:
    limit = int(port) + 1
   except ValueError:
    print "Invalid port number"
    sys.exit(1)

  for x in xrange(limit):
   s = socket(AF_INET, SOCK_STREAM)
   try:
    s.connect((host, x))
   except error:
    continue
   print " -> Port \33[1m%5s\33[0m is \33[1;32mopen\33[0m" % x
   s.close()


def stop(*args):
 print "Scan interrupted by user"
 sys.exit(0)


def main():
 signal.signal(signal.SIGINT, stop)

 if len(sys.argv) < 3:
  print "Usage: %s <hostname> <highest port to scan>" % sys.argv[0]
  sys.exit(1)

 s = Scanner()
 s.scan(sys.argv[1], sys.argv[2])


 print "Scan completed"

if __name__ == '__main__':
 main()

Ruby:

#!/usr/bin/env ruby

require 'socket'

trap "INT" do
 puts "\nScan interrupted"
 exit 0
end

class Scanner
 def scan(host, port)

  begin 
   limit = Integer(port)
  rescue
   puts "Error: port number must be an integer"
   exit 1
  end

  limit.times do |x|
   begin
    t = TCPSocket.new(host, x)
   rescue Errno::ECONNREFUSED
    next
   end
   puts " -> Port \33[1m#{x}\33[0m is \33[32mopen\33[0m"
   t.close
  end
  
 end
end



def main

 if ARGV.length < 2
  puts "Usage: #{$0} <hostname> <highest port to scan>"
  exit 1
 end

 scan = Scanner.new
 scan.scan(ARGV[0], ARGV[1])

 puts "Scan completed"
end

if $0 == __FILE__
 main
end

Usage for both scanners: scan <host to scan> <highest port to scan>

[Ashcrow]

Ashcrow: for us non-programmers, what does that do, and how would some of us use what you put up here?

It's here for a joke. What it does is when someone connects to port 23 it displays message, and if they connect a second time it displays both message and message2. A friend of mine was sick of ppl testing to see if port 23 (telnet) was open so I wrote that. It works, but it's flaky :P