On Thu, 2005-11-24 at 21:19 +0100, Björn Lindström wrote: > Alex Malinovich <demonbane@the-love-shack.net> writes: > > > You could just use an SSH tunnel FROM port 25 on localhost TO port 25 > > on the smarthost. For example: > > > > ssh -L25:localhost:25 -N your.smarthost.org > > > > That way anything that goes out on port 25 on your local system will > > come in on port 25 of the remote system. So exim will still answer it > > as a default SMTP connection. > > Excellent, though I assume you meant -L25:my.smarthost.org:25 there. As long as exim is listening on localhost as well as the public interface using localhost would still work. The specified in the L argument is resolved from the side you are connecting TO. So localhost would resolve to 127.0.0.1 on the same machine that has the my.smarthost.org address. > For the benefit of googlers, here's the solution I arrived at. > > I created a user called smtp-tunnel on the smarthost, and gave root on > the client machines rights to log into that machine with a key. Then I > run > > sudo autossh -f -N -L 25:nuala.thaning.se:25 smtp-tunnel@nuala.thaning.se > > After that, I just 'dpkg-reconfigure exim4-config' to have it use > nuala.thaning.se as a smarthost. > > Lots of thanks for the hint. Glad to help. -- Alex Malinovich Support Free Software, delete your Windows partition TODAY! Encrypted mail preferred. You can get my public key from any of the pgp.net keyservers. Key ID: A6D24837
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