socket扫描端口

Posted 2021-04-25 python运维技术

socket是网络编程中必要的模块，在我们日常运维中，我们也可以来实现我们一些功能，比如写一个不复杂的基于client/server架构的数据收集程序等，但今天我们不是讲如何网络编程，因为网络编程的概念太过庞大，这不是我们一篇文章能讲清楚的，希望往这方面发展的朋友我可以推荐你先把TCP/IP卷看看，建议至少要看3遍（这是我当时的的次数，如果有时间建议多看几遍），然后可以看下unix网络编程，好了，说远了，现在我们回到正题，看看如何用socket模块来扫描机器开放的端口，按惯例，先上代码：

#!/usr/bin/env python

import socket

import subprocess

import sys

from datetime import datetime

 

subprocess.call('clear', shell=True)

 

remoteServer    = raw_input("Enter a remote host to scan: ")

remoteServerIP  = socket.gethostbyname(remoteServer)

 

print "-" * 60

print "Please wait, scanning remote host", remoteServerIP

print "-" * 60

 

t1 = datetime.now()

 

try:

    for port in range(1,1024):  

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

        result = sock.connect_ex((remoteServerIP, port))

        if result == 0:

            print "Port {0}:     Open".format(port)

        sock.close()

 

except KeyboardInterrupt:

    print "You pressed Ctrl+C"

    sys.exit()

 

except socket.gaierror:

    print 'Hostname could not be resolved. Exiting'

    sys.exit()

 

except socket.error:

    print "Couldn't connect to server"

    sys.exit()

 

t2 = datetime.now()

 

total =  t2 - t1

 

print 'Scanning Completed in: ', total