Python开发端口扫描器

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")

使用：