Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750871AbWEQMCH (ORCPT ); Wed, 17 May 2006 08:02:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932199AbWEQMCH (ORCPT ); Wed, 17 May 2006 08:02:07 -0400 Received: from web51406.mail.yahoo.com ([206.190.38.185]:51115 "HELO web51406.mail.yahoo.com") by vger.kernel.org with SMTP id S1750871AbWEQMCG (ORCPT ); Wed, 17 May 2006 08:02:06 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=w/mFx5gxMHr3lbkBUGTxRI65Tf9kzSoxZ+OZHp8KGltb7uAw2zzNO25HP8K8Flzp3eR6Mi2V/KbkdgVGZZ7Ckn1zxpTwWJCPqc9b59jtJmh+OK+vrfGlw7FyCqB2A1RjIOcpur4EGucH2qLZvNUb7+H4wI1B5kOyBvTOb+0q40E= ; Message-ID: <20060517120205.68976.qmail@web51406.mail.yahoo.com> Date: Wed, 17 May 2006 14:02:05 +0200 (CEST) From: Joerg Pommnitz Subject: Re: Wiretapping Linux? To: Linux kernel In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1455 Lines: 36 --- "linux-os (Dick Johnson)" wrote: > > CPUs inside network cards (if any) don't run in the same address-space > as your host CPU, memory, etc. Data is DMAed (set up on the host-CPU > side) to/from this private bus, using the PCI bus. You would need > very extensive cooperative code running on the host CPU (in the > driver) to do anything useful. If you are going to write such > driver code, you don't need the CPU inside the controller card > at all because you are already running with high privileges on > the correct bus. Wiretapping is about listening in on communication. Network cards are the means this communication is carried out and see all the traffic somebody might want to tap into. This clearly makes it at least theoretically possible to use them as a listening device (and it sees all the other traffic on its network segment, too). Additionally its listening on the system bus. Question: Can it tap into data addressed to another peripheral (say the hd controller)? If so, then only the system RAM is outside its scope. Regards Joerg ___________________________________________________________ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/