闲来无事用Python写了一个简陋的端口扫描脚本，其简单的逻辑如下：

1. python DetectHostPort.py iplist.txt(存放着需要扫描的IP地址列表的文本，每行一个地址)

2. 输入指定的扫描端口，扫描后完成后将生成日志文件。

 

源码如下：

#!/usr/bin/env pythonimport sysimport timeimport socketdef getaddresslist(addr):    """    getaddresslist(addr) -> IP address file    IP address read from the file.    """    try:        with open(addr, "r") as ip_list:            lines = ip_list.readlines()            address = [line.strip() for line in lines]        return address    except (IOError, IndexError), e:        return str(e)def scan(ip_list, port):    """    scan() -> getaddresslist()    getaddresslist() function returns the IP address of the list.    """    if not isinstance(ip_list, list):        sys.exit("Function getaddresslist() return error message: %s" % ip_list)    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    s.settimeout(1)    f = open('E:\programming\public\python\scan.log', 'ab')    for addr in ip_list:        host = (addr, int(port))        try:            s.connect(host)            f.write("Host %s:%s connection success. \n" % (host[0], host[1]))        except Exception, e:            f.write("Host %s:%s connection failure: %s. \n" % (host[0], host[1], e))    f.close()    s.close()    return Trueif __name__ == '__main__':    addrs = sys.argv[1]    isNone = True    while isNone:        scanport = raw_input("Enter the scan port: ")        if scanport:            isNone = False        else:            continue    scan(getaddresslist(addrs), scanport)

运行时只能扫描一个端口，但是可以对代码进行修改，扩展为扫描多个端口。