forwarding ssh

David Banning david at
Sun Aug 8 05:45:12 UTC 2010

  Thanks for that Steven. Connecting this way is only a deviation from 
the usually connection  we use.  I have several users you have X-win32 
configured on their laptops on the road.  I was hoping to make this 
change invisible to each existing user and their setup since we will be 
going back to the previous direct X-Win32 ssh connection soon.  I'll 
look at the -R option that you mentioned which I was not aware of.

On 8/7/2010 8:27 PM, Steven Susbauer wrote:
> On 08/07/10 16:23, David Banning wrote:
>> I presently am using Putty and X-Win32 and I am connecting to a remote
>> machine successfully.
>> I now need to connect using SSH over the internet -through- one machine,
>> but have my SSH with a second machine on the same site - something like
>> so;
>> ssh-site1 --(internet)--->  site2-(also>  
>> loc2-(
>> I need to bridge the connection from to
>> so I've tried in ipnat;
> If I hear you right, you're trying to connect to site2 over the 
> internet, and also connect to loc2 through the connection on site2.
> SSH can create a tunnel itself. You could use something like:
>    'ssh -L 2200:loc2:22 user at site2'
> This would connect you to a shell on site2. Then on your machine open 
> another terminal and type:
> 'ssh -p 2200 user at localhost' which would connect to loc2 port 22 using 
> the connection on site2. If you try to close the connection to site2, 
> it won't work since you're still connected to loc2.
> ssh also supports forwarding a port on the remote server using -R, but 
> I'm led to believe you are trying to limit the connections that get 
> through the site2 to loc2 and -L requires you (or someone else) to be 
> on local system.
> In putty this same feature is configured under Connection > SSH > 
> Tunnels.

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