python实现指定ip端口扫描方式

#!/usr/bin/env python

import socket

def get_ip_status(ip,port):
  server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  try:
    server.connect((ip,port))
    print('{0} port {1} is open'.format(ip, port))
  except Exception as err:
    print('{0} port {1} is not open'.format(ip,port))
  finally:
    server.close()

if __name__ == '__main__':
  host = '10.0.0.11'
  for port in range(20,100):
    get_ip_status(host,port)

import telnetlib

def get_ip_status(ip,port):
  server = telnetlib.Telnet()   # 创建一个Telnet对象
  try:
    server.open(ip,port)     # 利用Telnet对象的open方法进行tcp链接
    print('{0} port {1} is open'.format(ip, port))
  except Exception as err:
    print('{0} port {1} is not open'.format(ip,port))
  finally:
    server.close()

if __name__ == '__main__':
  host = '10.0.0.11'
  for port in range(20,100):
    get_ip_status(host,port)

#!/usr/bin/env python

import telnetlib
import threading

def get_ip_status(ip,port):
  server = telnetlib.Telnet()
  try:
    server.open(ip,port)
    print('{0} port {1} is open'.format(ip, port))
  except Exception as err:
    print('{0} port {1} is not open'.format(ip,port))
  finally:
    server.close()

if __name__ == '__main__':
  host = '10.0.0.11'
  threads = []
  for port in range(20,100):
    t = threading.Thread(target=get_ip_status,args=(host,port))
    t.start()
    threads.append(t)

  for t in threads:
    t.join()