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List:       unison-users
Subject:    RE: [unison-users] Sync twp PCs (A and C) through a third (B)
From:       Karl M <karlm30 () hotmail ! com>
Date:       2009-12-31 18:44:57
Message-ID: COL102-W36294BA8AC697C4AF28E90B5780 () phx ! gbl
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> To: marco
> CC: unison-users
> From: alan
> Date: Thu, 31 Dec 2009 16:12:46 +0100
> Subject: Re: [unison-users] Sync twp PCs (A and C) through a third (B)
> 
> 
> On Thu, Dec 31, 2009 at 12:00 PM, Marco Grazzi> wrote:
> 
> > Dear Unison Users,
> 
> > 
> 
> > I am facing a rather difficult issue (at least to me).
> 
> > 
> 
> > I want to sync A and C.
> 
> > C is behind some protection/firewall so that to reach C, I have to ssh
> 
> > on B (a third PC).
> 
> > Is it possible (and can you hint about how to do it) to sync A and C
> 
> > without having a physical copy of the files I want to be sync'ed on B?
> 
> > For disk space and privacy (B is a server with many users) I would like
> 
> > to bypass having a physical copy on B.
> 
> 
> 
> Can't you create a ssh tunnel through B prior to launching the synchronization?
> 
> 
> 
> Alan
> 
If you set up a config file in your .ssh folder you can use the ssh option \
ProxyCommand to get through the firewall. Just make sure that you have netcat (nc) \
available on machine B and you can use something like the following  
Host machine-c
  HostName MachineC
  ProxyCommand ssh MachineB nc -w 10 %h %p 2>/dev/null
 
then you can access your MachineC behind the firewall with 
 
ssh machine-c
 
and unison can also work with that.
 
HTH,
 
...Karl 		 	   		  
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