Tunnelling UDP Traffic Through An SSH Connection: Difference between revisions
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<div class="screenTitle">Establish SSH Connection With TCP Port Forwarding</div> | <div class="screenTitle">Establish SSH Connection With TCP Port Forwarding</div> | ||
<div class="userInput"><span class="prompt">[root@probe tmp]# </span>ssh -p | <div class="userInput"><span class="prompt">[root@probe tmp]# </span>ssh -p 31222 -L 9999:localhost:9999 root@55.44.22.178</div> | ||
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root@55.44.22.178's password: | root@55.44.22.178's password: | ||
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=============================================== | =============================================== | ||
= Linux Network Security Toolkit (NST v1.5.0) = | |||
=============================================== | |||
</pre><div class="userInput"><span class="prompt">[root@probe-biostar ~]# </span></div> | |||
</div> | |||
In this example '''SSH''' is being '''NATed''' through a firewall. The '''SSH''' listening port is: "'''31222'''". We have choosen to use TCP port forward the '''''non-used''''' '''TCP''' port: "'''9999'''". The remote NST probe's IP address is: "'''55.44.22.178'''". | |||
= Linux Network Security Toolkit (NST v1.5.0) = | = Linux Network Security Toolkit (NST v1.5.0) = | ||
=============================================== | =============================================== | ||
Revision as of 11:14, 22 March 2007
Overview
This section describes how to use NST to tunnel a UDP traffic conversation through a SSH connection. For our example we will tunnel IPMItool traffic (UDP Port: 623) through an SSH connection to a Sun Fire X4200 server. Three systems are involved, 2 NST probes and the x4200 server. Reference information was taken from: "Performing UDP tunneling through an SSH connection".
Step By Step:
Tunnel A TCP Forward Port Through SSH
First we need to tunnel a non-used TCP port from the local NST probe to the remote NST probe which shares the same LAN as the destination x4200 server.
Establish SSH Connection With TCP Port Forwarding
[root@probe tmp]# ssh -p 31222 -L 9999:localhost:9999 root@55.44.22.178
root@55.44.22.178's password: Last login: Thu Mar 22 11:18:59 2007 from cpe-72-222-76-188.nycaper.res.rdr.com =============================================== = Linux Network Security Toolkit (NST v1.5.0) = ===============================================
[root@probe-biostar ~]#
In this example SSH is being NATed through a firewall. The SSH listening port is: "31222". We have choosen to use TCP port forward the non-used TCP port: "9999". The remote NST probe's IP address is: "55.44.22.178".
Linux Network Security Toolkit (NST v1.5.0)
===================================
[root@probe-biostar ~]#
