train-telnet - Train Plugin for connecting via Telnet

This plugin allows applications that rely on Train to communicate via Telnet.

Of course you already know that this is an insecure protocol - but if you look for this plugin, you probably have some specific needs. Right? If not, please try the default SSH transport included in Train.

Installation

You will have to build this gem yourself to install it as it is not yet on Rubygems.Org. For this there is a rake task which makes this a one-liner:

rake install:local

Transport parameters

Option	Explanation	Default
host	Hostname	(required)
user	Username to connect	(required)
password	Password to connect	(required)
port	Remote port	23
login_prompt	Username prompt on login	Username:
password_prompt	Password prompt on login	Password:
setup	Commands to issue on open
teardown	Commands to issue on close
raw_output	Suppress stdout processing	false
error_pattern	Regex to match error lines	ERROR.*
prompt_pattern	Regex to match device prompt	`[-a-zA-Z0-9]+(?:((?:config\

Example use

This will work for a Cisco IOS XE device with Telnet enabled:

require "train"
train  = Train.create("telnet", {
            host:     "10.0.0.1",
            user:     "username",
            password: "password",
            setup:    "terminal length 0\n",
            logger:   Logger.new($stdout, level: :info)
         })
conn   = train.connection
result = conn.run_command("show version\n")
conn.close