On Thu, 2003-07-17 at 10:55, Shachar Shemesh wrote:
> Tzafrir Cohen wrote:
> 
> >On Thu, Jul 17, 2003 at 09:07:18AM +0300, guy keren wrote:
> >  
> >
> >>On 17 Jul 2003, Micha Feigin wrote:
> >>
> >>    
> >>
> >>>I try to connect to a remote computer using ssh and then tunnel the ftp
> >>>connection back to by computer using
> >>>
> >>>ssh -R 1234:<local machine>:21 ...
> >>>      
> >>>
> >>why do you expect to be able to tunnet 'ftp' like that? ftp sends only 
> >>commands via port 21. data is sent via a seperate connection (data is both 
> >>the output of 'ls', and files you transfer with 'get' or 'put'). 
> >>
> >>it looks like you _might_ be able to do what you wanted, _if_ your could 
> >>force the 'data' port to always be the same port on the remote machine, 
> >>and then tunnel that port too via ssh. if this is possible, perhaps 
> >>someone on the list can show us how to do that.
> >>    
> >>
> >
> >However IIRC there is no inherent limitation in the ssh protocol for 
> >starting tunnels on the fly. 
> >
> >I vaugly recall that mindterm had a feature of "on-the-fly" creation of
> >ssh tunnels for ftp connections. Though in their page I only see an "ftp
> >proxy" mentioned:
> >
> >  http://www.mindbright.se/mindterm/techspec.php
> >
> >  
> >
> There is no such limitation (from the openssh client, just type ENTER, 
> ~, and do -L... or -l....). However, like I said in a different post, 
> that won't allow encrypted FTP. In order for that work, you need to 
> translate the "port" and "passive" commands inside the control 
> connection to have the new IP.
> 
>           Shachar

The reverese FTP over actually worked when I tried it at home over two
computers on my local network, so its not that, but something with
either ssh or an authentication problem.


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