From owner-freebsd-security@FreeBSD.ORG Wed Apr 21 04:51:35 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 2271A16A4CE for ; Wed, 21 Apr 2004 04:51:35 -0700 (PDT) Received: from gw.celabo.org (gw.celabo.org [208.42.49.153]) by mx1.FreeBSD.org (Postfix) with ESMTP id D63D443D31 for ; Wed, 21 Apr 2004 04:51:34 -0700 (PDT) (envelope-from nectar@celabo.org) Received: from localhost (localhost [127.0.0.1]) by gw.celabo.org (Postfix) with ESMTP id 62C3E54899; Wed, 21 Apr 2004 06:51:34 -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 84127-03; Wed, 21 Apr 2004 06:51:23 -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 BAC1454861; Wed, 21 Apr 2004 06:51:23 -0500 (CDT) Received: by lum.celabo.org (Postfix, from userid 501) id 399C21D0B2E; Wed, 21 Apr 2004 06:10:03 -0500 (CDT) Date: Wed, 21 Apr 2004 06:10:03 -0500 From: "Jacques A. Vidrine" To: Dragos Ruiu Message-ID: <20040421111003.GB19640@lum.celabo.org> Mail-Followup-To: "Jacques A. Vidrine" , Dragos Ruiu , Mike Tancsa , Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= , 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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200404201332.40827.dr@kyx.net> X-Url: http://www.celabo.org/ User-Agent: Mutt/1.5.6i cc: freebsd-security@freebsd.org cc: Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= Subject: 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 11:51:35 -0000 On Tue, Apr 20, 2004 at 01:32:40PM -0700, Dragos Ruiu wrote: > Also keep in mind ports are predictable to varying degrees depending on > the vendor or OS, which further reduces the brute force space you have to > go though without sniffing. This is exactly why I ported OpenBSD's TCP ephemeral port allocation randomization to FreeBSD-CURRENT (although I asked Mike Silby to commit it for me and take the blame if it broke :-). It will also be MFC'd shortly in time for 4.10-RELEASE. Cheers, -- Jacques Vidrine / nectar@celabo.org / jvidrine@verio.net / nectar@freebsd.org