On Mon, 23 Dec 2002, Dennis Davis wrote:
> >From: Timothy Arnold <timothy.arnold@???>
> >To: 'Suresh Ramasubramanian' <mallet@???>,
> > Timothy Arnold <timothy.arnold@???>
> >Cc: "'exim-users@???'" <exim-users@???>
> >Subject: RE: [Exim] hiding software type & version
> >Date: Mon, 23 Dec 2002 11:58:51 -0000
> >
> >I realize that there might be other methods for determining what
> >version of MTA/OS I am running, but why give a scriptkiddie an easy
> >ride?
>
> Quite. I'm happy to do this with most s/w *providing* it's
> cheap to do. My exim configuration files usually include
> the following somewhere in the main configuration section:
>
> # Let's go almost minimal on the SMTP greeting banner. This is
> # obviously only relevant if we are listening on the SMTP port.
> smtp_banner = "${primary_hostname} SMTP Server ready."
you should do
smtp_banner = "${primary_hostname} ESMTP Server ready."
IIRC a server SHOULD announce that it understands ESMTP.
There was a discussion on exim-users some months ago.
ciao
