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pythontelnettelnetlib

Python telnet connection successful

I'm wondering if it is possible to know if my telnet connection is successful?

So, if I'm connected to my switch and if I could write commands

telnet = telnetlib.Telnet(IP)
telnet.read_until(b"User Name:")
telnet.write(b"LOGIN\n")
telnet.read_until(b"Password:")
telnet.write(b"PASSWORD\n")
# Here I want to know if I'm connected
Solution

  • Don't use read_all if you plan on writing something after authentication. It blocks the connection until EOF is reached / connection is closed.

    First check the output telnet server is giving when an authentication is successful using putty or something else. read_untill the string to be matched after authentication.

    telnet = telnetlib.Telnet(IP)
telnet.read_until(b"User Name:")
telnet.write(b"LOGIN\n")
telnet.read_until(b"Password:")
telnet.write(b"PASSWORD\n")

telnet.read_untill("string to be matched")