python端口扫描

简易版：

#author:Blood_Zero
#coding:utf-8

import socket
import sys

PortList=[21,22,23,25,80,135]
#

host=sys.argv[1]

for i in PortList:
    sock=socket.socket()
    sock.settimeout(2)
    try:
        sock.connect((host,i))
        print "the port %d is open" %i
    except Exception:
        print "the port %d is not open" %i
    sock.close()

执行方法：python port_scan.py www.xx.com

多线程端口扫描：

#author:Blood_Zero
#coding:utf-8

import socket
import multiprocessing
import sys

host=sys.argv[1]
PortList=[21,22,23,25,80,135]

#定义端口扫描函数
def scan(port):
    port=(int(port))
    sock=socket.socket()
    sock.settimeout(1)
    print "the port %d is scanning" %port
    try:
        sock.connect((host,port))
        print "the server %s port %d is open" %(host,port)
    except Exception:
        print "the server %s port %d is not open" %(host,port)
    sock.close()

# 主函数
if __name__=="__main__":
    thread=multiprocessing.Pool(processes=100)
    for i in PortList:
        thread.apply_async(scan(i))    
    thread.close()

执行方式 python port_scan.py www.xx.com

后续还会出很多加强版！