Re: [SLE] tunneling through an intermediate host

From: Dave Howorth (dhoworth_at_mrc-lmb.cam.ac.uk)
Date: 05/12/05

  • Next message: Ken Schneider: "Re: [SLE] Problem with mouse" 
    Date: Thu, 12 May 2005 11:19:53 +0100
To: suse-linux-e@suse.com

    Dave Howorth wrote:
    > mb1-knetdome wrote:
    >
    >>> Is there some way to set up a connection from my home machine
    >>> through
    >>> the gateway to my work machine that makes the gateway become
    >>> invisible?
    >>> So I can run programs that open connections from my home
    >>> machine to my
    >>> work machine or vice-versa?
    >>
    >>
    >>
    >> A couple of options:
    >>
    >> 0. SSH to the gateway as usual, setting up a forwarded port to
    >> the SSH port of your internal machine. You shouldn't need to
    >> enable X forwarding on this first connection since it doesn't
    >> sound like you're actually running anything X from the gateway.
    >> Then start another SSH session, using X forwarding, on your
    >> home machine but connect to the localhost port that you
    >> forwarded to your internal machine. This should work but might
    >> be a little slow due to the SSH-inside-of-SSH encryption going
    >> on but it sounds like you were kind of doing that anyway.
    >
    >
    > This sounds interesting, and it appears to work in my testing at work.
    > I'll try it for real tonight. I didn't understand the description at
    > first sight, so for anybody else who didn't either, here's an example of
    > the command lines. Suppose the machines are called 'home', 'gateway' and
    > 'work' and I want to start xeyes on 'work' and see the result on 'home':
    >
    > In one terminal:
    > home$ ssh -L 2222:work:22 gateway
    > SOME PASSWORD STUFF HERE
    > gateway$
    >
    > Then in another terminal:
    > home$ ssh -X -p 2222 localhost
    > MORE PASSWORD STUFF
    > work$ xeyes
    >
    > and the eyes come up on my 'home' machine.

    I tried this from home and it didn't work :( Good to know Murphy's
    alive and well. My problem was passwords. When I do the second ssh, it
    asks me for the password for 'dave@localhost'. I tried my password on
    that home machine, my password on the gateway machine (different
    username, btw), my password on my work machine and no password at all.
    None worked. Anybody have any idea what I'm doing wrong?

    Thanks, Dave 

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