From owner-freebsd-security Wed Nov 21 13:37:36 2001 Delivered-To: freebsd-security@freebsd.org Received: from obsecurity.dyndns.org (adsl-64-165-226-105.dsl.lsan03.pacbell.net [64.165.226.105]) by hub.freebsd.org (Postfix) with ESMTP id 0458237B405 for ; Wed, 21 Nov 2001 13:37:18 -0800 (PST) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 937A866B0F; Wed, 21 Nov 2001 13:37:17 -0800 (PST) Date: Wed, 21 Nov 2001 13:37:17 -0800 From: Kris Kennaway To: Paul van der Zwan Cc: Kris Kennaway , security@FreeBSD.ORG Subject: Re: ipfw and snort Message-ID: <20011121133717.A22787@xor.obsecurity.org> References: <200111212126.fALLQE606054@trantor.xs4all.nl> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-md5; protocol="application/pgp-signature"; boundary="Q68bSM7Ycu6FN28Q" Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200111212126.fALLQE606054@trantor.xs4all.nl>; from paulz@trantor.xs4all.nl on Wed, Nov 21, 2001 at 10:26:14PM +0100 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 --Q68bSM7Ycu6FN28Q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Nov 21, 2001 at 10:26:14PM +0100, Paul van der Zwan wrote: > > On Wed, Nov 21, 2001 at 09:02:57PM +0100, Paul van der Zwan wrote: > > >=20 > > > I would like to run snort on my ppp link to my ISP to see what people= are > > > trying, but I also have a set of ipfw rules to allow only the traffic= I > > > want to allow. > > > Is there a way to have those rules in place but still have snort see = all=20 > > > incoming packets including those running into the deny rules ?? > >=20 > > Yes, this is how it works always. >=20 > I did some testing using ethereal and when I try an incoming telnet (whic= h=20 > is denied by ipwf) I don't see any packets arriving ( or ICMP going). > This make me suspect that bpf processing takes place after ipfw.. No, it does work. You must have something else wonky going on. Kris --Q68bSM7Ycu6FN28Q Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE7/B6MWry0BWjoQKURAn6oAKDijRH2MrtKGa/EtxzFtX6t0RL1UgCeMLSO S1xeemuryPRWSqAKe6R8a9g= =x4zO -----END PGP SIGNATURE----- --Q68bSM7Ycu6FN28Q-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message