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Telnet with a python client

Marco Becker

I have a telnet server running on an MCBSTM32F400 and can connect to it via Putty.
If I try to connect with an Python client, I won't get a connection.

Python code:

from telnetlib import Telnet

with Telnet('10.0.0.61', 23, 10.0) as tn:
    tn.write(b"a simple command\n")

I can set a brakpoint in my code in a function called "netTELNETs_ProcessMessage".
It will be called if I connect with Putty but not with Python.

Thanks in advance for you time,
Marco

Parents
  • 0 in reply to Andrew Neil

    Hi Andrew,

    Have you used something like Wireshark to see what's actually happening?
    I can log the communication with wireshark. But I am no expert with network protocols. I
    can see that the telnet server is responding to tcp messages, after that messages marked as "telnet" appear.

    Does your Python work for connecting to any other Telnet server?
    I connected to 'mapscii.me' and got a response.

    Thanks for helping,
    Marco

Reply
  • 0 in reply to Andrew Neil

    Hi Andrew,

    Have you used something like Wireshark to see what's actually happening?
    I can log the communication with wireshark. But I am no expert with network protocols. I
    can see that the telnet server is responding to tcp messages, after that messages marked as "telnet" appear.

    Does your Python work for connecting to any other Telnet server?
    I connected to 'mapscii.me' and got a response.

    Thanks for helping,
    Marco

Children
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