Tunnelling UDP Traffic Through An SSH Connection: Difference between revisions
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== Tunnel A TCP Forward Port Through SSH == | == 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. | First we need to establish the tunnel for a "'''''non-used'''''" '''TCP''' port from the ''local'' '''NST''' probe to the ''remote'' '''NST''' probe '''SSH''' server which shares the same '''LAN''' as the destination '''x4200''' server. | ||
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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: "'''55.44.22.178'''". On the ''local'' '''NST''' probe, '''TCP''' port: "'''9999'''" is bound to the '''localhost IP Address''': "'''127.0.0.1'''". | 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: "'''55.44.22.178'''". On the ''local'' '''NST''' probe, '''TCP''' port: "'''9999'''" is bound to the '''localhost IP Address''': "'''127.0.0.1'''". | ||
== Use: "'''nc'''" To Translate TCP To UDP Forward On The SSH Server Side == | == Use: "'''nc'''" To Translate TCP To UDP Forward On The SSH Server Side == | ||
Revision as of 17:44, 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'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 SSH server which shares the same LAN as the destination x4200 server.
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) = ===============================================
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: "55.44.22.178". On the local NST probe, TCP port: "9999" is bound to the localhost IP Address: "127.0.0.1".
