I was playing around with python 3.1 when I came to a problem. I want to connect to a telnet server. Here is my code:
import sys
import telnetlib
tn = telnetlib.Telnet("10.0.0.138")
tn.read_until(b"Username :", 2)
tn.write(b"\n")
tn.read_until(b"Password :", 2)
tn.write(b"\n")
tn.read_until(b"=>", 2)
tn.write(b"exit\n")
tn.close
It works to read until "Username :". There is also no error message when writing an emty line. But when i read until "Password :" i get an empty string. I also get an empty string when i read all.
Please help me if you can.
EDIT: Here is the output when i connect to the server via putty.
Willkommen am THOMSON TG787v
Plattform:VDNT-D Firmware:8.2.5.0 Seriennummer:CP0919MT238
Bitte identifizieren Sie sich mit Ihrem Benutzernamen und Kennwort
--------------------------------------------------------------------------------
Username :
Password :
------------------------------------------------------------------------
______ Thomson TG787v
___/_____/\
/ /\\ 8.2.5.0
_____/__ / \\
_/ /\_____/___ \ Copyright (c) 1999-2009, THOMSON
// / \ /\ \
_______//_______/ \ / _\/______
/ / \ \ / / / /\
__/ / \ \ / / / / _\__
/ / / \_______\/ / / / / /\
/_/______/___________________/ /________/ /___/ \
\ \ \ ___________ \ \ \ \ \ /
\_\ \ / /\ \ \ \ \___\/
\ \/ / \ \ \ \ /
\_____/ / \ \ \________\/
/__________/ \ \ /
\ _____ \ /_____\/
\ / /\ \ /___\/
/____/ \ \ /
\ \ /___\/
\____\/
------------------------------------------------------------------------
CP0919MT238=>
I pressed return after "Username :" and then after "Password :".
Answer
Lol, i had pretty much the same router as you.
Try this, bit of my old code:
tn = telnetlib.Telnet(HOST)
tn.read_until('Username : ')
tn.write(user+ "\r")
tn.read_until("Password : ")
tn.write(password+ "\n")
tn.write("\r")
This is for Python 2, but try just adding the extra space after the semicolon. Also, if this does not work, use wireshark and see what the putty connection is doing and correct your code to match.