3.34. python实现端口扫描

3.34.1. 使用socket工厂函数

代码示例1

#!/usr/bin/env python
# -*- coding:utf8 -*-
# auther; 18793
# Date：2019/6/19 23:03
# filename: python实现端口扫描.py
from socket import *


def conn_scan(host, port):
    conn = socket(AF_INET, SOCK_STREAM)
    try:
        conn.connect((host, port))
        print(host, port, "is avaliable")
    except Exception as e:
        print(host, port, "is not avaliable")
    finally:
        conn.close()


def main():
    host = "127.0.0.1"
    for port in range(20, 5000):
        conn_scan(host, port)

if __name__ == '__main__':
    main()

eg

#!/usr/bin/env python
# -*- coding:utf8 -*-
# auther; 18793
# Date：2019/4/17 12:43
# filename: check_port.py
import socket


def check_server(address, port=80):
    s = socket.socket()
    print('Attempting to connect to %s on port %s' % (address, port))
    try:
        s.connect((address, port))
        print('Connected to %s on port %s' % (address, port))
        return True
    except socket.error as e:
        print('Connection to %s on port %s failed: %s' % (address, port, e))
        return False
    finally:
        s.close()


check_server("220.181.111.37")

eg

#!/usr/bin/env python
# -*- coding:utf8 -*-
# auther; 18793
# Date：2019/6/21 10:23
# filename: socket实现端口扫描.py
import socket
import threading
import time


def testconn(host, port):
    sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sk.settimeout(1)
    try:
        sk.connect((host, port))
        return host + " Server is " + str(port) + " connect"
    except Exception:
        return host + " Server is " + str(port) + " not connect!"
    sk.close()


class Test(threading.Thread):
    def __init__(self):
        pass

    def test(self):
        test_conn = testconn('127.0.0.1', 80)
        print(test_conn)
    def run(self):
        while True:
            # print time.strftime('%Y-%m-%d %H:%M:%S')
            self.test()
            time.sleep(1)


a = Test()
a.run()

3.34.2. 使用telnetlib标准库模块

代码示例2

#!/usr/bin/env python
# -*- coding:utf8 -*-
# auther; 18793
# Date：2019/6/19 23:10
# filename: python使用telnet模块检测端口.py
import telnetlib


def conn_scan(host, port):
    t = telnetlib.Telnet()
    try:
        t.open(host, port, timeout=1)
        print(host, port, "is avaliable")
    except Exception as e:
        print(host, port, "is not avaliable")
    finally:
        t.close()


def main():
    host = "127.0.0.1"
    for port in range(80, 5000):
        conn_scan(host, port)


if __name__ == '__main__':
    main()