Autor: Alan Thew Fecha: A: Chris Edwards Cc: exim-users Asunto: Re: [exim] increase in smtp concurrency
On Fri, 7 Sep 2007 14:56 , Chris Edwards <chris@???> said:
> Anyone else noticing more concurrent incoming SMTP connections in last
> couple of weeks ?
>
> Chances are it's a buggy botnet, and has been discussed in various places
> including:
>
> http://blogs.msdn.com/tzink/archive/2007/09/01/new-spamming-tactic.aspx >
> and I'm guessing is responsible for the recent "smtp_reserve_hosts" thread
> on exim-users.
>
> Suggestions seem to include lowering timeouts - which seems likely to
> break legit things.
>
> 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 ?
Almost the exact words that have been going through my mind as well...
