Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263678AbUCURNJ (ORCPT ); Sun, 21 Mar 2004 12:13:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263679AbUCURNJ (ORCPT ); Sun, 21 Mar 2004 12:13:09 -0500 Received: from smtp.mailix.net ([216.148.213.132]:61392 "EHLO smtp.mailix.net") by vger.kernel.org with ESMTP id S263678AbUCURNH (ORCPT ); Sun, 21 Mar 2004 12:13:07 -0500 Message-ID: <405D239B.30602@mail.portland.co.uk> Date: Sun, 21 Mar 2004 07:09:47 +0200 From: Jad Saklawi Reply-To: Jad Saklawi User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031105 Thunderbird/0.3 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: hisham@hisham.cc, llug-users@greencedars.org X-SA-Exim-Mail-From: saki@mail.portland.co.uk Subject: Fwd: MAC / IP conflict Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Report: * 0.4 DATE_IN_PAST_12_24 Date: is 12 to 24 hours before Received: date X-SA-Exim-Version: 3.1 (built Thu Oct 23 13:26:47 PDT 2003) X-SA-Exim-Scanned: Yes X-uvscan-result: clean (1B56Tx-0003PK-Ei) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 814 Lines: 19 ----- Forwarded message from Hisham Mardam Bey ----- Date: Sun, 21 Mar 2004 13:52:59 +0200 In short, I need to detect when someone on the network uses my MAC and my IP address. Longer story follows. I am on a LAN which might have some potentially dangerous users. Those users might spoof my MAC address and additionally use my IP address, thus forcing my box to go offline, and not be able to communicate with my gateway. What I need is a passive way to check for something of the sort, and perhaps a notofication into syslog (the latter is not very important). - 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/