From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jamie Lokier Subject: Re: [Qemu-devel] Re: [PATCH 1/5] virtio-net: Allow setting the MAC address via set_config Date: Thu, 15 Jan 2009 13:11:08 +0000 Message-ID: <20090115131108.GC32368@shareable.org> References: <1231881829.9095.191.camel@bling> <20090114164155.GA6431@shareable.org> <496E61F0.8060605@redhat.com> <200901142214.46522.paul@codesourcery.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: dlaor@redhat.com, Mark McLoughlin , kvm To: qemu-devel@nongnu.org Return-path: Received: from mail2.shareable.org ([80.68.89.115]:36081 "EHLO mail2.shareable.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755393AbZAONLM (ORCPT ); Thu, 15 Jan 2009 08:11:12 -0500 Content-Disposition: inline In-Reply-To: <200901142214.46522.paul@codesourcery.com> Sender: kvm-owner@vger.kernel.org List-ID: Paul Brook wrote: > > What I meant is that if we allow the guest to change his mac address, it > > can deliberately > > change it to other hosts/guests mac and thus create networking problems. > > Although guest can always mangle packets, maybe it worth enforcing these > > macs for the guest. > > This doesn't seem any different to real hardware that allows you to > change the MAC address. Indeed I have used that on several occasions to workaround pointless firewalls and home networking restrictions. People doing MAC-level hot-failover in high-availability environments do it too. -- Jamie