From owner-freebsd-current@FreeBSD.ORG  Fri Jul 16 23:04:47 2010
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 5BFF61065672
	for <freebsd-current@FreeBSD.org>; Fri, 16 Jul 2010 23:04:47 +0000 (UTC)
	(envelope-from freebsd-current-local@be-well.ilk.org)
Received: from mail5.sea5.speakeasy.net (mail5.sea5.speakeasy.net
	[69.17.117.49]) by mx1.freebsd.org (Postfix) with ESMTP id 338968FC0A
	for <freebsd-current@FreeBSD.org>; Fri, 16 Jul 2010 23:04:46 +0000 (UTC)
Received: (qmail 16141 invoked from network); 16 Jul 2010 23:04:46 -0000
Received: from dsl092-078-145.bos1.dsl.speakeasy.net (HELO be-well.ilk.org)
	([66.92.78.145])
	(envelope-sender <freebsd-current-local@be-well.ilk.org>)
	by mail5.sea5.speakeasy.net (qmail-ldap-1.03) with SMTP
	for <freebsd-current@FreeBSD.org>; 16 Jul 2010 23:04:46 -0000
Received: from lowell-desk.lan (lowell-desk.lan [172.30.250.6])
	by be-well.ilk.org (Postfix) with ESMTP id 4E55650829;
	Fri, 16 Jul 2010 19:04:38 -0400 (EDT)
Received: by lowell-desk.lan (Postfix, from userid 1147)
	id 7F2E21CC8A; Fri, 16 Jul 2010 19:04:38 -0400 (EDT)
From: Lowell Gilbert <freebsd-current-local@be-well.ilk.org>
To: Alex Kozlov <spam@rm-rf.kiev.ua>
References: <20100716143621.GA9281@ravenloft.kiev.ua>
Date: Fri, 16 Jul 2010 19:04:38 -0400
In-Reply-To: <20100716143621.GA9281@ravenloft.kiev.ua> (Alex Kozlov's message
	of "Fri, 16 Jul 2010 17:36:21 +0300")
Message-ID: <44k4ov6nax.fsf@lowell-desk.lan>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (berkeley-unix)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: freebsd-current@FreeBSD.org, Gabor Kovesdan <gabor@FreeBSD.org>
Subject: Re: periodic script in base system to run csup
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 16 Jul 2010 23:04:47 -0000

Alex Kozlov <spam@rm-rf.kiev.ua> writes:

> On Fri, Jul 16, 2010 at 04:27:39PM +0200, Gabor Kovesdan wrote:
>> Em 2010.07.16. 16:23, Alex Kozlov escreveu:
>> > On Fri, Jul 16, 2010 at 03:58:33PM +0200, Gabor Kovesdan wrote:
>> >
>> > Thousands pc simultaneously try to access cvsup servers?
>> > Sound like a ddos to me.
>> Yes, this was the only concern and that's why I started this discussion.
> And because its periodic, We can't use portsnap solution (random delay
> before csup start).

It's not completely impossible; periodic could spin off a separate shell
for it, with a random delay.  It's not clear what the best way to deal
with the output would be, although several approaches present themselves.
It would be a lot more complicated than Gabor's approach, though.