使用Python编写简单的端口扫描器的实例分享

#!/usr/bin/env python 
import socket 
if __name__=='__main__': 
  port=3389  
  s=socket.socket() 
  for cnt in range(253,2,-1): 
    address='XXX.XXX.XXX.'+str(cnt) #XXX.XXX.XXX IP网段 
    try: 
      s.connect((address,port)) 
      print address 
    except socket.error,e: 
      print 'Error OR Port Not Opened' 

# -*- coding:utf8 -*-
#!/usr/bin/python
# Python:     2.7.8
# Platform:    Windows
# Authro:     wucl
# Program:     端口扫描
# History:     2015.6.1
 
import socket, time, thread
socket.setdefaulttimeout(3)
 
def socket_port(ip,port):
  """
  输入IP和端口号，扫描判断端口是否开放
  """
  try:
    if port>=65535:
      print u'端口扫描结束'
    s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    result=s.connect_ex((ip,port))
    if result==0:
      lock.acquire()
      print ip,u':',port,u'端口开放'
      lock.release()
    s.close()
  except:
    print u'端口扫描异常'
 
def ip_scan(ip):
  """
  输入IP，扫描IP的0-65534端口情况
  """
  try:
    print u'开始扫描 %s' % ip
    start_time=time.time()
    for i in range(0,65534):
      thread.start_new_thread(socket_port,(ip,int(i)))
    print u'扫描端口完成，总共用时 ：%.2f' %(time.time()-start_time)
    raw_input("Press Enter to Exit")
  except:
    print u'扫描ip出错'
     
 
if __name__=='__main__':
  url=raw_input('Input the ip you want to scan:\n')
  lock=thread.allocate_lock()
  ip_scan(url)