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Re: Many ports open by default



On Mon, Apr 30, 2001 at 08:12:59PM +0000, Will Lowe wrote:
> > Actually there are some packages that depend on a mail-transport-agent,
> > (such as lilo->logrotate->mailx), yet one may not want to have an MTA
> > running on certain systems.  I suppose a dummy or minimal MTA may be
> 
> I think it's safe to assume that your system MUST have a working MTA of
> some sort (even if it's local-only, which is supported by eximconfig).
> Running a Unix system without an MTA *at*all* means that you won't get
> notified of failing cron jobs, etc. ...
This is true, but does it need to be world-accessible?  There should be a
way to either have it listen on localhost only, or not listen on TCP at all,
and perhaps this should be the default (correct me if this is already
the case, but I don't recall it being so).  Would it be feasible to shoot
for a base install with no daemons listening on INADDR_ANY?

> 
> > used (and may exist, I'm not aware), but this certainly highlights the
> 
> "apt-get install ssmtp".  Note that this has terrible behaviour on even
> transient failure -- it just drops messages into dead-letter.  Exim (don't
> run the daemon, just the cronjob that cleans the queue) works better for
> me.
> 
> The OTHER daemons (certainly xdm) are optional.  But I think it's probably
> safe to say that running Debian without an MTA is "unsupported".
> 
> 							Will
> 
> 
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