[Israel.pm] web-based script

Tal Kelrich tal at musicgenome.com
Tue Aug 31 06:09:38 PDT 2004


On Tue, 31 Aug 2004 15:32:55 +0300 (IDT)
Shlomo Yona <shlomo at cs.haifa.ac.il> wrote:

> On Tue, 31 Aug 2004, Tal Kelrich wrote:
>  
> >> [2] this is tricky: For some security reason, server B
> >> doesn't accept logins from anywhere but server C, so server
> >> C must first be contacted. Then one needs to login to server
> >> B. Moreover, server B doesn't accept any sftp calls, so one
> >> must sftp from B to any other server to get files. Server C
> >> doesn't have enough quota to relay the file, so server A
> >> must be also used...
> >
> > Can't you just tunnel your sftp connection via server C?
> 
> Can you please explain and give an example?
> 

Ok, it's something like this:

first off, set up a tunneled connection, you connect to local port 2200 which connects you in turn with the remote ssh

note that you will have to remove the record for 127.0.0.1 in ~/.ssh/known_hosts if you had one originally, or this will not work

ssh -N -L 2200:b.example.org:22 c.example.org

then scp through it (or rsync, or sftp)

scp -P 2200 foo bar baz user at localhost:

sftp -oPort=2200 localhost

rsync --rsh="ssh -p 2200" foo bar baz user at localhost:

etc.

-- 
Tal Kelrich
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