From owner-freebsd-security Wed Oct 31 17: 7:11 2001 Delivered-To: freebsd-security@freebsd.org Received: from smtp4.cluster.oleane.net (smtp4.cluster.oleane.net [195.25.12.62]) by hub.freebsd.org (Postfix) with ESMTP id EF27837B405 for ; Wed, 31 Oct 2001 17:07:07 -0800 (PST) Received: from diabolic-cow.chatgris.net (c2334b26.fsp.oleane.fr [194.51.75.38]) by smtp4.cluster.oleane.net with ESMTP id fA1174712171 for ; Thu, 1 Nov 2001 02:07:05 +0100 (CET) Received: by diabolic-cow.chatgris.net (Postfix, from userid 1000) id 4410B21C; Thu, 1 Nov 2001 02:07:16 +0100 (CET) Date: Thu, 1 Nov 2001 02:07:16 +0100 From: =?iso-8859-1?Q?R=E9mi_Guyomarch?= To: freebsd-security@freebsd.org Subject: Re: can I use keep-state for icmp rules? Message-ID: <20011101020716.F22705@diabolic-cow.chatgris.net> References: <009c01c16017$dca045d0$0603a8c0@MIKELT> <20011029153954.B224@gohan.cjclark.org> <005501c1613f$dfb46520$0603a8c0@MIKELT> <20011030164253.C223@gohan.cjclark.org> <000901c1620f$51428530$2801010a@MIKELT> <20011031130817.A246@gohan.cjclark.org> <20011031144209.A89351@bluenugget.net> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.2.5i In-Reply-To: <20011031144209.A89351@bluenugget.net>; from geniusj@bluenugget.net on Wed, Oct 31, 2001 at 02:42:09PM -0800 Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Wed, Oct 31, 2001 at 02:42:09PM -0800, Jason DiCioccio wrote: > On Wed, Oct 31, 2001 at 01:08:17PM -0800, Crist J. Clark wrote: > [snip] > > Not sure if checking more "carefully" is an accurate statement, but > > IPFilter does only allow TCP packets that it "expects" back in. It > > does track sequence numbers which ipfw(8) does not track at all. > [snip] > > Now I'm curious. Will using "flags S" after keep state rules in ipfilter > degrade the quality of ipf's stateful inspection? [...] No. The reverse. Btw, s/after/before/g -- Rémi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message