Belier : script your SSH connection

Software version	1.2
Operating System	Debian 7
Website	Belier Website
Last Update	06/05/2013
Others

1 Introduction

Belier allows opening a shell or executing a command on a remote computer through a SSH connection. The main feature of Belier is its ability to cross several intermediate computers before realizing the job.

• Belier reaches the final computer through intermediate machines.
• You can execute commands with any account available on the remote computer.
• It is possible to switch account on intermediate computers before accessing the final computer.
• You can open a data tunnel through every host you cross to the final host.
• Belier generates one script for each final computer to reach.

Belier aims to give a single system administrator a tool to work independently, without requiring to modify the computers he has to cross, just using the current configurations of every machines he has to work with. So it's not a revolutionary tool but it helps to be productive quickly.

For instance, here is what is possible to do with it :

2 Installation

To install it, as usual it's easy on Debian :

aptitude

aptitude install belier

3 Configuration

The configuration is really simple. Type line by line in a 'connection' file, connection's informations to :

1. The server name or IP
2. The username
3. The password

It should looks like this :

~/connection

server1_bound username password server2_bound username password server3_bound username password final_server username password

Then generate an automatic script shell connection with Belier :

bel

bel -e ~/connection

You should now have a script containing all the commands to quickly connect to your wished server :

final_server.sh

#!/usr/bin/expect -f set timeout 10   spawn ssh -o NoHostAuthenticationForLocalhost=yes -o StrictHostKeyChecking=no server1_bound expect -re "(%|#|\\$) $" send -- "su - username\r" expect ":" send -- "password\r" expect -re "(%|#|\\$) $" send -- "ssh -o NoHostAuthenticationForLocalhost=yes -o StrictHostKeyChecking=no server2_bound\r" expect -re "(%|#|\\$) $" send -- "su - username\r" expect ":" send -- "password\r" expect -re "(%|#|\\$) $" send -- "ssh -o NoHostAuthenticationForLocalhost=yes -o StrictHostKeyChecking=no server3_bound\r" expect -re "(%|#|\\$) $" send -- "su - username\r" expect ":" send -- "password\r" expect -re "(%|#|\\$) $" send -- "ssh -o NoHostAuthenticationForLocalhost=yes -o StrictHostKeyChecking=no final_server\r" expect -re "(%|#|\\$) $" send -- "su - username\r" expect ":" send -- "password\r" expect -re "(%|#|\\$) $" interact +++ return

You can now launch the command with final_server.sh :-)