Python开发端口扫描器

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首先是最常用的端口扫描器：

虽说有nmap等强大的工具，不过如果由于条件限制无法安装Nmap呢？

我这个脚本写的比较简单，默认扫描1-65535全部的端口

实际的话，可以根据需要自己修改脚本来实现定制化扫描

# -*- coding:utf-8 -*-

__author__ = "Yiqing"

import socket

import time

import thread

import optparse

import re

socket.setdefaulttimeout(3)

def port_scan(ip, port):

    """

    对某一个IP的某一个端口进行扫描

    :param ip: 目标

    :param port: 端口

    :return: None

    """

    try:

        if port > 65535 or port < 1:

            print "[!] Port Scan End"

        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        result = s.connect_ex((ip, port))

        if int(result) == 0:

            lock.acquire()

            print "[-] IP:" + str(ip) + " Port:" + str(port) + " Open"

            lock.release()

        s.close()

    except Exception:

        pass

def ip_scan(ip):

    """

    对IP的所有端口扫描

    :param ip:目标

    :return: None

    """

    try:

        print "[*] Start Port Scan : " + ip

        start_time = time.time()

        for port in range(1, 65535):

            thread.start_new_thread(port_scan, (ip, int(port)))

        print "[+] Port Scan Complete! Time:" + str(time.time() - start_time)

    except Exception:

        pass

def main():

    """

    输入参数处理

    :return: None

    """

    print "Welcome to PortScanner"

    print "Author: %s  Version:1.0" % __author__

    parse = optparse.OptionParser(

        'python %prog -H <target host>')

    parse.add_option('-H', dest="target_host", type="string", help='specify the host')

    (options, args) = parse.parse_args()

    target_host = options.target_host

    if target_host is not None and re.match(r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}', target_host):

        ip_scan(target_host)

    else:

        exit()

if __name__ == '__main__':

    lock = thread.allocate_lock()

    main()

    time.sleep(3)

    raw_input("Press Enter to Exit")