python - 与路由器的连接打不开

Question

我尝试使用 Python 脚本通过 GNS3 连接到路由器 R1:

import getpass
import sys
import telnetlib

HOST = "192.168.1.1"
user = raw_input("Enter your remote account: ")
password = getpass.getpass()

tn = telnetlib.Telnet(HOST)

tn.read_until(b"Username: ")
tn.write(user + "\n")
if password:
    tn.read_until("Password: ")
    tn.write(password + "\n")

tn.write("enable\n")
tn.write("cisco\n")
tn.write("conf t\n")
tn.write("exit\n")
tn.write("exit\n")


print(tn.read_all().decode('ascii'))

但它仍然卡住，因为我认为它无法连接到带有 tn = telnetlib.Telnet(HOST)

行的路由器

当我执行 ^C 时出现此错误:

admin ~/Desktop $ python3 test.py
Enter your remote account: david
Password: 
^CTraceback (most recent call last):
  File "test.py", line 9, in <module>
    tn = telnetlib.Telnet(HOST)
  File "/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/telnetlib.py", line 218, in _init_
    self.open(host, port, timeout)
  File "/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/telnetlib.py", line 234, in open
    self.sock = socket.create_connection((host, port), timeout)
  File "/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/socket.py", line 713, in create_connection
    sock.connect(sa)
KeyboardInterrupt

从 R1 的终端连接到 telnet 工作正常

Answer 1

试试这段代码:

import getpass
import sys
import telnetlib

HOST = "192.168.1.1"
PORT = 23

user = raw_input("Enter your remote account: ")
password = getpass.getpass()

tn = telnetlib.Telnet(HOST, PORT)

tn.read_until(b"Username: ")
tn.write(bytes(user + "\n", 'utf-8'))
if password:
    tn.read_until(b"Password: ")
    tn.write(bytes(password + "\n", 'utf-8'))

commands="enable\n cisco\n conf t\n exit\n exit\n"
tn.write(commands.encode())

print(tn.read_all())

如果您正确配置了路由器，此代码将起作用。