On Tue, 2007-09-11 at 17:01 -0700, Marc Perkel wrote:
>
>
> John Horne wrote:
> > On Fri, 2007-09-07 at 14:56 +0100, Chris Edwards wrote:
> >
> > > Anyone else noticing more concurrent incoming SMTP connections in last
> > > couple of weeks ?
> > >
> > >
> > May I ask do you mean concurrent as in from the same sending host, or
> > simply that you are receiving more connections generally than usual?
> >
> >
> > > Perhaps it's time to switch our DNSBL etc tests from "deny" to "drop" mode.
> > > Is there any obvious downside to this ? Do most folk use drop already ?
> > >
> > >
> > I've been running one of our mailhubs with a 'drop' instead of 'deny'
> > for the past few days. No problems reported.
> >
> >
> > John.
> >
> >
>
> Just a thought. Maybe you could do a rate limit in the NOTQUIT acl to
> slow down IP addresses that don't send a quit?
>
Surely imposing any sort of delay will cause more connections to be used
up though? Or rather it will delay connections to become free, and thus
make the problem worse.
John.
--
---------------------------------------------------------------
John Horne, University of Plymouth, UK Tel: +44 (0)1752 233914
E-mail: John.Horne@??? Fax: +44 (0)1752 233839
