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:
')
 lock=thread.allocate_lock()
 ip_scan(url)