From owner-freebsd-net Sat Apr 17 8:21: 8 1999 Delivered-To: freebsd-net@freebsd.org Received: from mailf.telia.com (mailf.telia.com [194.22.194.25]) by hub.freebsd.org (Postfix) with ESMTP id A27FE14C22 for ; Sat, 17 Apr 1999 08:20:59 -0700 (PDT) (envelope-from thomas.uhrfelt@plymovent.se) Received: from d1o68.telia.com (root@d1o68.telia.com [62.20.138.241]) by mailf.telia.com (8.8.8/8.8.8) with ESMTP id RAA02331 for ; Sat, 17 Apr 1999 17:18:32 +0200 (CEST) Received: from tu (t1o68p13.telia.com [62.20.138.13]) by d1o68.telia.com (8.8.8/8.8.5) with SMTP id RAA23859 for ; Sat, 17 Apr 1999 17:18:15 +0200 (CEST) Received: by localhost with Microsoft MAPI; Sat, 17 Apr 1999 17:14:35 +0200 Message-ID: <01BE88F5.C4660D20.thomas.uhrfelt@plymovent.se> From: Thomas Uhrfelt Reply-To: "thomas.uhrfelt@plymovent.se" To: "'freebsd-net@freebsd.org'" Subject: DHCP - IPFW - Controlling IPs Date: Sat, 17 Apr 1999 17:14:25 +0200 Organization: Plymovent AB X-Mailer: Microsoft Internet-e-post/MAPI - 8.0.0.4211 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I have now sucessfully installed ISC:s DHCP server on my FreeBSD box to pass out IP:s etc. to the users on our local network, but I Have a little thing grinding on my mind, as I am going to use DUMMYNET and IPFW to regulate what users can and cannot do on other networks. Is there any way that I can check ( periodically or all the time ) that the IP the packet is coming from really is the one that is assigned by the DHCP daemon? What I mean is, for my ipfw rules/pipes to work, I need to be sure that the user has just that IP I have assigned to him. In other words, so he can't go in and change his Win95/NT/Mac and turn off DHCP and assign an IP on his own.. Is this possible to control at all? / Thomas Uhrfelt Datortekniker PlymoVent AB To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message