自主实现Telnet流量抓取

根据测试需求，需要抓取Telnet流量包，使用wireshark + Python（socket、telnetlib库）实现

实现代码

主要此处有坑，根据协议规则，wireshark 默认端口为23 的是Telnet协议，小编的启动服务的时候未设置23端口，因此怎么抓都回显tcp；

搭建服务端

import socketdef start_server(host, port):server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)server.bind((host, port))server.listen(1)print(f"Server started on {host}:{port}")while True:client, addr = server.accept()print(f"Connected by {addr}")while True:data = client.recv(1024)if not data:breakprint(f"Received: {data.decode()}")client.sendall(data)client.close()if __name__ == "__main__":HOST = 'ip'  # Server addressPORT = 23  # Server portstart_server(HOST, PORT)

“启动”
在这里插入图片描述

搭建客户端

客户端这里需要注意，编码的要求，如果你用的非UTF-8，就别写中文；

import telnetlibdef telnet_client(host, port):with telnetlib.Telnet(host, port) as tn:while True:message = input("Enter message: ")tn.write(message.encode('UTF-8') + b"\n")response = tn.read_until(b"\n").decode('utf-8')print(f"Server response: {response.strip()}")if __name__ == "__main__":HOST = 'ip'  # Server addressPORT = 23        # Server porttelnet_client(HOST, PORT)