Hi There,

One approach that might come in handy here is SSH tunneling. This is a technique for directing a remote SSH connection back to your local server.

To recap, you have ssh access to an intermediate host that has telnet access to the destination machine. Telnet normally runs on port 23.

Hopefully your local host is a 'Nix machine, which means that you can use a recipe such as this to set up port forwarding: Setting up an SSH tunnel

E.g. in another window: % ssh -g -L 10023:telnet-host:23 ssh-host

Telnet will then appear to be running locally on port 10023: 

% telnet localhost 10023
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
....
login:

[download]
You can then adapt you script to connect to telnet on your localhost on port 10023. 
#!/usr/bin/perl
use warnings; use strict;
use Net::Telnet;
my ($username, $password) = @ARGV;
die "usage $0 username password"
    unless $username && $password;
my $telnet = new Net::Telnet ( Timeout=>10, Errmode=>'die', Port => 10
+023);
$telnet->open('localhost');
$telnet->waitfor('/[\$#%:><][\s\b]+$/');
print "found login prompt...";
$telnet->print($username);
$telnet->waitfor('/[\$#%:><][\s\b]+$/');
print "found password prompt...";
$telnet->print($password);
print "logged in yay!\n";

[download]
Hope this helps.

In reply to Re: Passing telnet commands through SSH by snoopy
in thread Passing telnet commands through SSH by SiliconeClone

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.