From: fw <fwmailinglists@...>
Date: 2008-02-19T22:45:14+09:00
Subject: Re: Using net:ssh

On Tue, 2008-02-19 at 22:15 +0900, Valerio Schiavoni wrote:
> Hello,
> what I want to do is the following:
> - ssh into a remote machine (let's call it 'frontend')
> - from the front-end, ssh into another machine (call it node-A)
> 
> So far, i was only able to perform the first step:
> 
> require 'rubygems'
> require 'net/ssh'
> 
> def do_run_introducer(session)
>   session.open_channel do |channel|
>     channel.on_data do |ch, data|
>       puts data
>     end
>    channel.exec "ls" #to verify that i'm actually logged in..
>   end
> end
> 
> Net::SSH.start( 'remote-machine-address', my-user-name' ) do |
> session|
>   do_run_introducer session
>   #do_run_peers session
>  session.loop
> end
> 
> Any help is very appreciated
> 

Use port forwarding to tunnel a connection through the front end to the
SSH port on the node behind it. Then call a second SSH session on the
tunneled port.

See http://net-ssh.rubyforge.org/chapter-6.html for port forwarding.

HTH,

Felix