Python 端口扫描程序无法正常工作答案

【问题标题】：Python port scanner not working as it is supposed toPython 端口扫描程序无法正常工作
【发布时间】：2020-11-28 15:42:02
【问题描述】：

我尝试在 python 中制作一个 ssh 端口扫描器，它获取一个类的每个 ip（例如 13.120.x.y）。到目前为止我没有收到任何错误，但它需要很长时间，并且到目前为止还没有 IP 地址打开端口（我已经运行了 5 分钟）。

编辑：当端口打开时，我似乎确实收到了消息。

import socket
from datetime import datetime
from multiprocessing.dummy import Pool as ThreadPool

def make_ips(ip_class):
    ip_addresses = [f"{ip_class}.{part3}.{part4}" for part3 in range(0, 256) for part4 in range(0, 256)]
    return ip_addresses


def scan(remoteServerIP):
    print("-" * 60)
    print("Please wait, scanning remote host", remoteServerIP)
    print("-" * 60)
    try:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        result = sock.connect_ex((remoteServerIP, 22))
        if result == 0:
            print(f"{remoteServerIP}: Open")
            return remoteServerIP
        sock.close()
    except socket.gaierror:
        print(f'Hostname {remoteServerIP} could not be resolved.')
    except socket.error:
        print(f"Couldn't connect to server {remoteServerIP}")


def main():
    t1 = datetime.now()
    ipclass = str(input("please input the ip class: "))
    ips = make_ips(ipclass)
    hostnames = []
    pool = ThreadPool(13)
    hostnames = pool.map(scan, ips)
    pool.close()
    pool.join()
    open("hosts.txt", "w").write(hostnames).splitlines()
    t2 = datetime.now()
    total =  t2 - t1
    print('Scanning Completed in: ', total)

if __name__ == "__main__":
    main()

【问题讨论】：

你是如何输入的？能举个例子吗？
@AbhishekRai 您从 make_ips 获得的是使用相同 IP 类的 IP 地址列表。例如：如果 ip 类是 15.30，那么生成的 ip 地址将从 15.30.0.0 到 15.30.255.255。
否 ..您输入的内容是什么？什么价值观？
@AbhishekRai 正如我所说，如果我想扫描从 15.30.0.0 到 15.30.255.255 的所有 IP 地址，那么输入将为 15.30
@AbhishekRai 不，我只对 ssh 端口 (22) 感兴趣

标签： python python-3.x multithreading sockets port

【解决方案1】：

我修好了。我不得不使用更多线程。

import socket
from datetime import datetime
from multiprocessing.dummy import Pool as ThreadPool

def make_ips(ip_class):
    ip_addresses = [f"{ip_class}.{part3}.{part4}" for part3 in range(0, 256) for part4 in range(0, 256)]
    return ip_addresses


def scan(remoteServerIP):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    result = sock.connect_ex((remoteServerIP, 22))
    if result == 0:
        print(f"{remoteServerIP}: Open")
        return remoteServerIP
    sock.close()


def main():
    ipclass = str(input("please input the ip class: "))
    ips = make_ips(ipclass)
    pool = ThreadPool(20000)
    hostnames = pool.map(scan, ips)
    pool.close()
    pool.join()
    for hostname in hostnames:
        if hostname:
            open("hosts.txt", "a").write(f"{hostname}\n")


if __name__ == "__main__":
    main()

【讨论】：