From owner-freebsd-security@FreeBSD.ORG Wed Apr 30 13:56:52 2014 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 5A2CDAED for ; Wed, 30 Apr 2014 13:56:52 +0000 (UTC) Received: from smarthost1.sentex.ca (smarthost1.sentex.ca [IPv6:2607:f3e0:0:1::12]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "smarthost.sentex.ca", Issuer "smarthost.sentex.ca" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 23F061510 for ; Wed, 30 Apr 2014 13:56:52 +0000 (UTC) Received: from [IPv6:2607:f3e0:0:4:f025:8813:7603:7e4a] (saphire3.sentex.ca [IPv6:2607:f3e0:0:4:f025:8813:7603:7e4a]) by smarthost1.sentex.ca (8.14.8/8.14.8) with ESMTP id s3UDukea093973 for ; Wed, 30 Apr 2014 09:56:46 -0400 (EDT) (envelope-from mike@sentex.net) Message-ID: <53610127.5000603@sentex.net> Date: Wed, 30 Apr 2014 09:56:55 -0400 From: Mike Tancsa Organization: Sentex Communications User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: freebsd-security@freebsd.org Subject: Re: FreeBSD Security Advisory FreeBSD-SA-14:08.tcp References: <201404300435.s3U4ZAw1093717@freefall.freebsd.org> In-Reply-To: <201404300435.s3U4ZAw1093717@freefall.freebsd.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.74 X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Apr 2014 13:56:52 -0000 On 4/30/2014 12:35 AM, FreeBSD Security Advisories wrote: > IV. Workaround > > It is possible to defend to these attacks by doing traffic normalization > using a firewall. This can be done by including the following /etc/pf.conf > configuration: > > scrub in all Hi, Is this the only pf option that will work, or is scrub fragment reassemble sufficient ? ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/