Date: Wed, 21 Nov 2001 13:37:17 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Paul van der Zwan <paulz@trantor.xs4all.nl> Cc: Kris Kennaway <kris@obsecurity.org>, security@FreeBSD.ORG Subject: Re: ipfw and snort Message-ID: <20011121133717.A22787@xor.obsecurity.org> In-Reply-To: <200111212126.fALLQE606054@trantor.xs4all.nl>; from paulz@trantor.xs4all.nl on Wed, Nov 21, 2001 at 10:26:14PM %2B0100 References: <kris@obsecurity.org> <200111212126.fALLQE606054@trantor.xs4all.nl>
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[-- Attachment #1 --] 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: > > > > > > 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 > > > incoming packets including those running into the deny rules ?? > > > > Yes, this is how it works always. > > I did some testing using ethereal and when I try an incoming telnet (which > 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 [-- Attachment #2 --] -----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-----
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