On Fri, 23 Jan 1998, Galen Hazelwood wrote:
> Greetings, all.
>
> Consider the following situation: I have a linux box, running exim,
> which is doing IP Masquerading and providing internet connectivity for a
> LAN. I want to configure it so that SMTP connections coming in from
> eth0 will be accepted, and all others (except perhaps for an ISP mailer
> for ETRN support) rejected. I could set up a firewall rule to do this,
> but for complex reasons (involving problems letting that one ETRN host
> through) I don't want to do it.
>
> What I really need is something like "sender_device_accept = eth0",
> since with masquerading on, there isn't any reliable way to determine
> where any given IP address actually is. I'm pretty sure this isn't
> possible, and I'm going to have to go back to working on that !*#@!#&
> firewall, but I'm asking in the vague hope that somebody else has
> already found some kind of workaround.
The only thing that might help you here is the option
local_interfaces
which can be used to restrict the Exim daemon to listen on specific
interfaces only, but I suspect that with masquerading etc. it won't be
very helpful.
--
Philip Hazel University Computing Service,
ph10@??? New Museums Site, Cambridge CB2 3QG,
P.Hazel@??? England. Phone: +44 1223 334714
--
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http://www.exim.org/ ***
