From owner-freebsd-security Thu Oct 14 2:47: 4 1999 Delivered-To: freebsd-security@freebsd.org Received: from enst.enst.fr (enst.enst.fr [137.194.2.16]) by hub.freebsd.org (Postfix) with ESMTP id 53B8314D75 for ; Thu, 14 Oct 1999 02:47:01 -0700 (PDT) (envelope-from beyssac@enst.fr) Received: from bofh.enst.fr (bofh-2.enst.fr [137.194.2.37]) by enst.enst.fr (8.9.1a/8.9.1) with ESMTP id LAA08931; Thu, 14 Oct 1999 11:46:49 +0200 (MET DST) Received: by bofh.enst.fr (Postfix, from userid 12426) id C5BCCD226; Thu, 14 Oct 1999 11:46:48 +0200 (CEST) Message-ID: <19991014114648.A38195@enst.fr> Date: Thu, 14 Oct 1999 11:46:48 +0200 From: Pierre Beyssac To: sthaug@nethelp.no, avalon@coombs.anu.edu.au Cc: jkb@best.com, roberto@keltia.freenix.fr, freebsd-security@FreeBSD.ORG Subject: Re: anti-spoofing References: <199910140924.TAA27074@cheops.anu.edu.au> <67021.939893926@verdi.nethelp.no> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.93.2i In-Reply-To: <67021.939893926@verdi.nethelp.no>; from sthaug@nethelp.no on Thu, Oct 14, 1999 at 11:38:46AM +0200 Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, Oct 14, 1999 at 11:38:46AM +0200, sthaug@nethelp.no wrote: > No, it's a good range to block. Always. Because you never want to have > multicast addresses as *source* address. Furthermore, multicast is generally tunneled as IP in IP since most providers don't provide it natively; so in many cases you shouldn't see it as a destination address on a leased line either. -- Pierre Beyssac pb@enst.fr To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message