From owner-freebsd-questions@FreeBSD.ORG  Tue Sep 21 14:30:59 2004
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id B8E3A16A4CE
	for <questions@freebsd.org>; Tue, 21 Sep 2004 14:30:59 +0000 (GMT)
Received: from web21202.mail.yahoo.com (web21202.mail.yahoo.com
	[216.136.130.18])
	by mx1.FreeBSD.org (Postfix) with SMTP id 5A3D643D2F
	for <questions@freebsd.org>; Tue, 21 Sep 2004 14:30:59 +0000 (GMT)
	(envelope-from adriankok2000@yahoo.com.hk)
Message-ID: <20040921143059.7681.qmail@web21202.mail.yahoo.com>
Received: from [64.141.32.2] by web21202.mail.yahoo.com via HTTP;
	Tue, 21 Sep 2004 22:30:59 CST
Date: Tue, 21 Sep 2004 22:30:59 +0800 (CST)
From: adrian kok <adriankok2000@yahoo.com.hk>
To: questions@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
Subject: ipfw and access-list
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 21 Sep 2004 14:30:59 -0000

Dear all

I am using freebsd as router and firewall

I have question about the following rules 
implemented on ipfw and access-list of zebra

Do I have any problem and slow down the router using
same rule?

Thank you so much

# Deny all inbound traffic from non-routable reserved
address spaces
$cmd 00300 deny all from 192.168.0.0/16 to any in via
$pif  #RFC 1918 private IP
$cmd 00301 deny all from 172.16.0.0/12 to anyin via
$pif     #RFC 1918 private IP
$cmd 00302 deny all from 10.0.0.0/8 to anyin via $pif 
        #RFC 1918 private IP
$cmd 00303 deny all from 127.0.0.0/8 to anyin via $pif
       #loopback
$cmd 00304 deny all from 0.0.0.0/8 to anyin via $pif  
         #loopback
$cmd 00305 deny all from 169.254.0.0/16 to anyin via
$pif   #DHCP auto-config
$cmd 00306 deny all from 192.0.2.0/24 to anyin via
$pif       #reserved for doc's
$cmd 00307 deny all from 204.152.64.0/23 to anyin via
$pif  #Sun cluster interconnect
$cmd 00308 deny all from 224.0.0.0/3 to anyin via $pif
        #Class D & E multicast