Re: Close list
On Tue, Dec 26, 2000 at 11:36:00AM +0200, Kai Henningsen wrote:
> Just tested that. ssh to master, telnet to localhost smtp, it was quite
> willing to relay mail with a non-local envelope. (And left enough clues in
> the header to track who did that just in case it ever becomes necessary.)
>
> Now if someone was to send much mail that way, I expect checking with the
> admins in advance might be a good idea, but for low volume (and for
> contents where the association with Debian in the mail headers won't be a
> problem) this seems like an easy way to do it.
>
> For automated usage, I expect one would prefer something like netcat to
> telnet, though :-)
Or better, ssh port forwarding. Simpler, more reliable, and encryption as a
bonus.
ssh -L localport:localhost:25 somewhere.debian.org sleep a_while
and while ssh is connected, connect to localport on the client side to be
forwarded to port 25 on localhost at the server side.
--
- mdz
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