Tunnelling UDP Traffic Through An SSH Connection
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's Integrated Lights Out Manager (ILOM) service processor network interface. 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 establish the tunnel for 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.
firstname.lastname@example.org'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) = ===============================================
In this example SSH traffic is being NATed through a firewall. The SSH filtered port at the dirty side of the firewall is: "31222". We have chosen to use TCP port forwarding for the "non-used" TCP port: "9999". The remote NST probe's IP Address is: "184.108.40.206". On the local NST probe, TCP port: "9999" is bound to the localhost IP Address: "127.0.0.1".