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keifir
Tux's lil' helper
Joined: 10 Jun 2002
Posts: 119
Location: Canada
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 Posted: Sat Jan 31, 2004 9:45 pm Post subject: Transferring files - from A to C through B. Possible? |
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Hi,
here's my question. I'd like to transfer files from machine A to machine C with sftp. Here's my problem:
- host A can see B.
- host C can see B.
- host A cannot see C.
So, to transfer files from A to C , i have to go through B. Now i need to transfer large files and I don't have enough room to transfer them all to host B first and then to C.
Is there any way to transfer these files?
Thanx,
keifir |
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adaptr
Watchman
Joined: 06 Oct 2002
Posts: 6730
Location: Rotterdam, Netherlands
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| Posted: Sat Jan 31, 2004 10:09 pm Post subject: |
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If you can open up ssh tunnels for both connections you can simply pipe it through, or use an intermediate file.
If you have FTP access you may be able to use FXP; this is a sort-of protocol that allows you to control multiple FTP servers/clients from a central one. |
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jmoeller
Tux's lil' helper
Joined: 07 Nov 2003
Posts: 114
Location: USA
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| Posted: Sat Jan 31, 2004 10:13 pm Post subject: |
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Yep (I tried this out to make sure it works, too):
On A (replace <B> and <C> with their real names, of course): | Code: | | $ ssh -L 60022:<C>:22 <B> |
This makes it so that any requests you send on A to localhost:60022 will actually get sent by B to C on port 22.
Then, aagain on A: | Code: | | $ sftp -oPort=60022 localhost |
This will make said connection on localhost:60022, then get translated to C on port 22 (which happens to be what you need for sftp).
Now, you'll get that host key warning for localhost. It should be the same host key for C. Just remove the entry for localhost from .ssh/known_hosts on A after you're through. Have fun! 
-EDIT-
D'oh! simultaneous entries!
_________________
Cogito sumere potum alterum. |
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