From owner-freebsd-questions@FreeBSD.ORG Tue Apr 27 21:42:56 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DC31F106564A for ; Tue, 27 Apr 2010 21:42:56 +0000 (UTC) (envelope-from john@starfire.mn.org) Received: from elwood.starfire.mn.org (starfire.skypoint.net [173.8.102.29]) by mx1.freebsd.org (Postfix) with ESMTP id A7D3D8FC08 for ; Tue, 27 Apr 2010 21:42:56 +0000 (UTC) Received: from elwood.starfire.mn.org (john@localhost [127.0.0.1]) by elwood.starfire.mn.org (8.14.3/8.14.3) with ESMTP id o3RLgtGF093321; Tue, 27 Apr 2010 16:42:55 -0500 (CDT) (envelope-from john@elwood.starfire.mn.org) Received: (from john@localhost) by elwood.starfire.mn.org (8.14.3/8.14.3/Submit) id o3RLgtSv093320; Tue, 27 Apr 2010 16:42:55 -0500 (CDT) (envelope-from john) Date: Tue, 27 Apr 2010 16:42:55 -0500 From: John To: "Randal L. Schwartz" Message-ID: <20100427214255.GA93302@elwood.starfire.mn.org> References: <20100427193106.GA91570@elwood.starfire.mn.org> <861ve0he9d.fsf@red.stonehenge.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <861ve0he9d.fsf@red.stonehenge.com> User-Agent: Mutt/1.4.2.3i Cc: freebsd-questions@freebsd.org Subject: Re: Really simple spam trap - /dev/pf permissions? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Apr 2010 21:42:56 -0000 On Tue, Apr 27, 2010 at 12:44:14PM -0700, Randal L. Schwartz wrote: > >>>>> "John" == John writes: > > John> (Obviously, I'll want to add to my cron scripts to age entries out > John> of the spammers table, just to keep it down to a manageable size. > John> I already have two dozen entries.) > > You'll have a lot of collateral damage. I've worked with a lot of > schemes over the years for spamfighting. A lot of spam is sourced > inside corporate or educational choke points, meaning that a spam > message from inside a company would block all remaining mail from that > company. So, for this to work, you really need to time out your blocks > no more than an hour or two later, or legit mail will get unnecessarily > delayed. Grr. I just expired the first address, at four hours old, and IMMEDIATELY got a bunch Pfizer spams that were just delayed... This is certainly not an easy nut to crack. -- John Lind john@starfire.MN.ORG