[Novalug] Allowing limited remote SMTP using Postfix

[Rob Payne]

On Wed, Oct 03, 2007 at 12:37:14PM -0400, Tom Goldsmith wrote:
> Hello all:
> 
> I have a basic Postfix mail server running on a home server. Right now 
> it is set up to allow only machines connected to my local network to 
> send mail, but I'm travelling more and would like to be able to send 
> using my server when I'm on the road. (I've become good at finding 
> workarounds, but they're a pain).
> 
> What are my options?

Tom,

One option that hasn't been discussed is setting up IPv6 on the "home"
and "mobile" machines.  The mobile machine can be set up to get the
same tunnel, generally, from the tunnel provider.  That, generally,
allows for end-to-end connectivity on any number of ports, even if you
get stuck behind NAT, while on the road.  Of course, that should be
used with other authentication methods (TLS, SSH keys, x.509, etc.),
in case your tunnel changes (the providers will usually give the
tunnel to other folks, if you go more than $time between bringing up
the tunnel.)

I've used this tunnel provider:

    http://www.go6.net/4105/freenet.asp

Here is a similar provider, with which I've had no experience:

		       http://tunnelbroker.net/

				 -rob
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