From owner-freebsd-questions Mon Jul 21 11:35:16 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id LAA01670 for questions-outgoing; Mon, 21 Jul 1997 11:35:16 -0700 (PDT) Received: from granite.sentex.net (granite.sentex.ca [199.212.134.1]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id LAA01649; Mon, 21 Jul 1997 11:35:10 -0700 (PDT) Received: (from mdtancsa@localhost) by granite.sentex.net (8.8.5/8.6.9) id OAA29815; Mon, 21 Jul 1997 14:43:48 -0400 (EDT) From: Mike D Tancsa Message-Id: <199707211843.OAA29815@granite.sentex.net> Subject: preventing ICMP echo requests to the broadcast address To: questions@freebsd.org, hackers@freebsd.org Date: Mon, 21 Jul 1997 14:43:45 -0400 (EDT) X-Mailer: ELM [version 2.4ME+ PL31 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Is there any easy way to always prevent someone from pinging the broadcast addresses on my networks other than explicitly filtering them using ipfw ? Also, while on the topic of ipfw, does anyone know how much processor overhead ipfw adds to the system ? I suppose the more rules one adds the worse it gets. But does anyone have a reasonable guestimate ? Thanks, ---Mike