在Linux中判断一台主机是否可达，可以使用ping命令，而判断端口是否打开，可以使用telnet命令，但是telnet命令没有超时时间的参数，使用起来不是很方便，那么可以利用Python来完成一个端口扫描的功能

socket实现端口扫描

#!/usr/bin/env pythonimport socketdef 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)

telnetlib实现端口扫描

import telnetlibdef 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)

多线程实现高效扫描

#!/usr/bin/env pythonimport telnetlibimport threadingdef 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()

以上这篇python实现指定ip端口扫描方式就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。