From owner-freebsd-security@FreeBSD.ORG Wed Apr 21 09:55:39 2004 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 14C5B16A4CE for ; Wed, 21 Apr 2004 09:55:39 -0700 (PDT) Received: from gw.celabo.org (gw.celabo.org [208.42.49.153]) by mx1.FreeBSD.org (Postfix) with ESMTP id BCD7143D66 for ; Wed, 21 Apr 2004 09:55:38 -0700 (PDT) (envelope-from nectar@celabo.org) Received: from localhost (localhost [127.0.0.1]) by gw.celabo.org (Postfix) with ESMTP id 2B55654846; Wed, 21 Apr 2004 11:55:38 -0500 (CDT) Received: from gw.celabo.org ([127.0.0.1]) by localhost (hellblazer.celabo.org [127.0.0.1]) (amavisd-new, port 10024) with SMTP id 86835-01; Wed, 21 Apr 2004 11:55:27 -0500 (CDT) Received: from lum.celabo.org (lum.celabo.org [10.0.1.107]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "lum.celabo.org", Issuer "celabo.org CA" (verified OK)) by gw.celabo.org (Postfix) with ESMTP id 8B5C75482B; Wed, 21 Apr 2004 11:55:27 -0500 (CDT) Received: by lum.celabo.org (Postfix, from userid 501) id F2CAA1D168B; Wed, 21 Apr 2004 11:54:54 -0500 (CDT) Date: Wed, 21 Apr 2004 11:54:54 -0500 From: "Jacques A. Vidrine" To: Mike Tancsa Message-ID: <20040421165454.GB20049@lum.celabo.org> Mail-Followup-To: "Jacques A. Vidrine" , Mike Tancsa , freebsd-security@FreeBSD.org References: <6.0.3.0.0.20040420125557.06b10d48@209.112.4.2> <6.0.3.0.0.20040420144001.0723ab80@209.112.4.2> <200404201332.40827.dr@kyx.net> <20040421111003.GB19640@lum.celabo.org> <6.0.3.0.0.20040421121715.04547510@209.112.4.2> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6.0.3.0.0.20040421121715.04547510@209.112.4.2> X-Url: http://www.celabo.org/ User-Agent: Mutt/1.5.6i cc: freebsd-security@FreeBSD.org Subject: Re: Other possible protection against RST/SYN attacks (was Re: TCP RST attack X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Security issues [members-only posting] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Apr 2004 16:55:39 -0000 On Wed, Apr 21, 2004 at 12:30:40PM -0400, Mike Tancsa wrote: > > One other technique that might help with respect to this attack is what > Cisco implemented, commonly known as the "TTL hack" > > http://www.nanog.org/mtg-0302/hack.html More commonly known as GTSM and RFC 3682. Cheers, -- Jacques Vidrine / nectar@celabo.org / jvidrine@verio.net / nectar@freebsd.org