Re: Port forwarding more than once
From: Dave Howe (DaveHowe_at_cmn.sharp-uk.co.uk)
To: "Email List: Secure Shell" <firstname.lastname@example.org> Date: Mon, 12 Jan 2004 18:49:29 -0000
Rachan Malhotra wrote:
> I want to create a long SSH tunnel running from my laptop to one
> server and from there to another. Also, I want to forward port x on
> my machine to the 1st server and then to the 2nd server through this
> tunnel. Is it possible to create an SSH tunnel among three (or more)
> machines ?
yup, but it may be better not to.
the two alternatives are:
1. make a tunnel from your port to server 1, destinatiation server 2 port
x (obviously, the link between server 1 and 2 is unencrypted, but that may
not be an issue)
2. use a simple port forwarder on server 1 that relays connections to
server 2 port 22; then tunnel to server 1 on the port you are running the
forwarder on, and it will effectively open a ssh link (and therefore any
tunnels) on server 2.
That said, I am in fact doing your original solution - ssh to my corporate
firewall, with tunnels to my mailserver and my desktop pc (both port 22)
then tunnels from there to various other machines via the first set of