From owner-freebsd-security Thu Oct 14 2:39: 6 1999 Delivered-To: freebsd-security@freebsd.org Received: from verdi.nethelp.no (verdi.nethelp.no [158.36.41.162]) by hub.freebsd.org (Postfix) with SMTP id 0E67B153C2 for ; Thu, 14 Oct 1999 02:38:47 -0700 (PDT) (envelope-from sthaug@nethelp.no) Received: (qmail 67023 invoked by uid 1001); 14 Oct 1999 09:38:46 +0000 (GMT) To: avalon@coombs.anu.edu.au Cc: jkb@best.com, roberto@keltia.freenix.fr, freebsd-security@FreeBSD.ORG Subject: Re: anti-spoofing From: sthaug@nethelp.no In-Reply-To: Your message of "Thu, 14 Oct 1999 19:24:19 +1000 (EST)" References: <199910140924.TAA27074@cheops.anu.edu.au> X-Mailer: Mew version 1.05+ on Emacs 19.34.2 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Date: Thu, 14 Oct 1999 11:38:46 +0200 Message-ID: <67021.939893926@verdi.nethelp.no> Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > > deny ip 224.0.0.0 0.15.255.255 any log > > That's a bad range to block - well, maybe not if you have no intention of using multicast. No, it's a good range to block. Always. Because you never want to have multicast addresses as *source* address. Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message