xref: /freebsd/libexec/rc/rc.firewall (revision 5d8c2d4c4fe63356c7bbcdc35615717b085684d4)
1*5d8c2d4cSEmmanuel Vadot#!/bin/sh -
2*5d8c2d4cSEmmanuel Vadot# Copyright (c) 1996  Poul-Henning Kamp
3*5d8c2d4cSEmmanuel Vadot# All rights reserved.
4*5d8c2d4cSEmmanuel Vadot#
5*5d8c2d4cSEmmanuel Vadot# Redistribution and use in source and binary forms, with or without
6*5d8c2d4cSEmmanuel Vadot# modification, are permitted provided that the following conditions
7*5d8c2d4cSEmmanuel Vadot# are met:
8*5d8c2d4cSEmmanuel Vadot# 1. Redistributions of source code must retain the above copyright
9*5d8c2d4cSEmmanuel Vadot#    notice, this list of conditions and the following disclaimer.
10*5d8c2d4cSEmmanuel Vadot# 2. Redistributions in binary form must reproduce the above copyright
11*5d8c2d4cSEmmanuel Vadot#    notice, this list of conditions and the following disclaimer in the
12*5d8c2d4cSEmmanuel Vadot#    documentation and/or other materials provided with the distribution.
13*5d8c2d4cSEmmanuel Vadot#
14*5d8c2d4cSEmmanuel Vadot# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*5d8c2d4cSEmmanuel Vadot# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*5d8c2d4cSEmmanuel Vadot# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*5d8c2d4cSEmmanuel Vadot# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*5d8c2d4cSEmmanuel Vadot# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*5d8c2d4cSEmmanuel Vadot# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*5d8c2d4cSEmmanuel Vadot# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*5d8c2d4cSEmmanuel Vadot# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*5d8c2d4cSEmmanuel Vadot# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*5d8c2d4cSEmmanuel Vadot# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*5d8c2d4cSEmmanuel Vadot# SUCH DAMAGE.
25*5d8c2d4cSEmmanuel Vadot#
26*5d8c2d4cSEmmanuel Vadot# $FreeBSD$
27*5d8c2d4cSEmmanuel Vadot#
28*5d8c2d4cSEmmanuel Vadot
29*5d8c2d4cSEmmanuel Vadot#
30*5d8c2d4cSEmmanuel Vadot# Setup system for ipfw(4) firewall service.
31*5d8c2d4cSEmmanuel Vadot#
32*5d8c2d4cSEmmanuel Vadot
33*5d8c2d4cSEmmanuel Vadot# Suck in the configuration variables.
34*5d8c2d4cSEmmanuel Vadotif [ -z "${source_rc_confs_defined}" ]; then
35*5d8c2d4cSEmmanuel Vadot	if [ -r /etc/defaults/rc.conf ]; then
36*5d8c2d4cSEmmanuel Vadot		. /etc/defaults/rc.conf
37*5d8c2d4cSEmmanuel Vadot		source_rc_confs
38*5d8c2d4cSEmmanuel Vadot	elif [ -r /etc/rc.conf ]; then
39*5d8c2d4cSEmmanuel Vadot		. /etc/rc.conf
40*5d8c2d4cSEmmanuel Vadot	fi
41*5d8c2d4cSEmmanuel Vadotfi
42*5d8c2d4cSEmmanuel Vadot
43*5d8c2d4cSEmmanuel Vadot############
44*5d8c2d4cSEmmanuel Vadot# Define the firewall type in /etc/rc.conf.  Valid values are:
45*5d8c2d4cSEmmanuel Vadot#   open        - will allow anyone in
46*5d8c2d4cSEmmanuel Vadot#   client      - will try to protect just this machine
47*5d8c2d4cSEmmanuel Vadot#   simple      - will try to protect a whole network
48*5d8c2d4cSEmmanuel Vadot#   closed      - totally disables IP services except via lo0 interface
49*5d8c2d4cSEmmanuel Vadot#   workstation - will try to protect just this machine using stateful
50*5d8c2d4cSEmmanuel Vadot#		  firewalling. See below for rc.conf variables used
51*5d8c2d4cSEmmanuel Vadot#   UNKNOWN     - disables the loading of firewall rules.
52*5d8c2d4cSEmmanuel Vadot#   filename    - will load the rules in the given filename (full path required)
53*5d8c2d4cSEmmanuel Vadot#
54*5d8c2d4cSEmmanuel Vadot# For ``client'' and ``simple'' the entries below should be customized
55*5d8c2d4cSEmmanuel Vadot# appropriately.
56*5d8c2d4cSEmmanuel Vadot
57*5d8c2d4cSEmmanuel Vadot############
58*5d8c2d4cSEmmanuel Vadot#
59*5d8c2d4cSEmmanuel Vadot# If you don't know enough about packet filtering, we suggest that you
60*5d8c2d4cSEmmanuel Vadot# take time to read this book:
61*5d8c2d4cSEmmanuel Vadot#
62*5d8c2d4cSEmmanuel Vadot#	Building Internet Firewalls, 2nd Edition
63*5d8c2d4cSEmmanuel Vadot#	Brent Chapman and Elizabeth Zwicky
64*5d8c2d4cSEmmanuel Vadot#
65*5d8c2d4cSEmmanuel Vadot#	O'Reilly & Associates, Inc
66*5d8c2d4cSEmmanuel Vadot#	ISBN 1-56592-871-7
67*5d8c2d4cSEmmanuel Vadot#	http://www.ora.com/
68*5d8c2d4cSEmmanuel Vadot#	http://www.oreilly.com/catalog/fire2/
69*5d8c2d4cSEmmanuel Vadot#
70*5d8c2d4cSEmmanuel Vadot# For a more advanced treatment of Internet Security read:
71*5d8c2d4cSEmmanuel Vadot#
72*5d8c2d4cSEmmanuel Vadot#	Firewalls and Internet Security: Repelling the Wily Hacker, 2nd Edition
73*5d8c2d4cSEmmanuel Vadot#	William R. Cheswick, Steven M. Bellowin, Aviel D. Rubin
74*5d8c2d4cSEmmanuel Vadot#
75*5d8c2d4cSEmmanuel Vadot#	Addison-Wesley / Prentice Hall
76*5d8c2d4cSEmmanuel Vadot#	ISBN 0-201-63466-X
77*5d8c2d4cSEmmanuel Vadot#	http://www.pearsonhighered.com/
78*5d8c2d4cSEmmanuel Vadot#	http://www.pearsonhighered.com/educator/academic/product/0,3110,020163466X,00.html
79*5d8c2d4cSEmmanuel Vadot#
80*5d8c2d4cSEmmanuel Vadot
81*5d8c2d4cSEmmanuel Vadotsetup_loopback() {
82*5d8c2d4cSEmmanuel Vadot	############
83*5d8c2d4cSEmmanuel Vadot	# Only in rare cases do you want to change these rules
84*5d8c2d4cSEmmanuel Vadot	#
85*5d8c2d4cSEmmanuel Vadot	${fwcmd} add 100 pass all from any to any via lo0
86*5d8c2d4cSEmmanuel Vadot	${fwcmd} add 200 deny all from any to 127.0.0.0/8
87*5d8c2d4cSEmmanuel Vadot	${fwcmd} add 300 deny ip from 127.0.0.0/8 to any
88*5d8c2d4cSEmmanuel Vadot	if [ $ipv6_available -eq 0 ]; then
89*5d8c2d4cSEmmanuel Vadot		${fwcmd} add 400 deny all from any to ::1
90*5d8c2d4cSEmmanuel Vadot		${fwcmd} add 500 deny all from ::1 to any
91*5d8c2d4cSEmmanuel Vadot	fi
92*5d8c2d4cSEmmanuel Vadot}
93*5d8c2d4cSEmmanuel Vadot
94*5d8c2d4cSEmmanuel Vadotsetup_ipv6_mandatory() {
95*5d8c2d4cSEmmanuel Vadot	[ $ipv6_available -eq 0 ] || return 0
96*5d8c2d4cSEmmanuel Vadot
97*5d8c2d4cSEmmanuel Vadot	############
98*5d8c2d4cSEmmanuel Vadot	# Only in rare cases do you want to change these rules
99*5d8c2d4cSEmmanuel Vadot	#
100*5d8c2d4cSEmmanuel Vadot	# ND
101*5d8c2d4cSEmmanuel Vadot	#
102*5d8c2d4cSEmmanuel Vadot	# DAD
103*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass ipv6-icmp from :: to ff02::/16
104*5d8c2d4cSEmmanuel Vadot	# RS, RA, NS, NA, redirect...
105*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass ipv6-icmp from fe80::/10 to fe80::/10
106*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass ipv6-icmp from fe80::/10 to ff02::/16
107*5d8c2d4cSEmmanuel Vadot
108*5d8c2d4cSEmmanuel Vadot	# Allow ICMPv6 destination unreachable
109*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass ipv6-icmp from any to any icmp6types 1
110*5d8c2d4cSEmmanuel Vadot
111*5d8c2d4cSEmmanuel Vadot	# Allow NS/NA/toobig (don't filter it out)
112*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass ipv6-icmp from any to any icmp6types 2,135,136
113*5d8c2d4cSEmmanuel Vadot}
114*5d8c2d4cSEmmanuel Vadot
115*5d8c2d4cSEmmanuel Vadot. /etc/rc.subr
116*5d8c2d4cSEmmanuel Vadot. /etc/network.subr
117*5d8c2d4cSEmmanuel Vadot
118*5d8c2d4cSEmmanuel Vadotif [ -n "${1}" ]; then
119*5d8c2d4cSEmmanuel Vadot	firewall_type="${1}"
120*5d8c2d4cSEmmanuel Vadotfi
121*5d8c2d4cSEmmanuel Vadotif [ -z "${firewall_rc_config_load}" ]; then
122*5d8c2d4cSEmmanuel Vadot        load_rc_config ipfw
123*5d8c2d4cSEmmanuel Vadotelse
124*5d8c2d4cSEmmanuel Vadot        for i in ${firewall_rc_config_load}; do
125*5d8c2d4cSEmmanuel Vadot                load_rc_config $i
126*5d8c2d4cSEmmanuel Vadot        done
127*5d8c2d4cSEmmanuel Vadotfi
128*5d8c2d4cSEmmanuel Vadot
129*5d8c2d4cSEmmanuel Vadotafexists inet6
130*5d8c2d4cSEmmanuel Vadotipv6_available=$?
131*5d8c2d4cSEmmanuel Vadot
132*5d8c2d4cSEmmanuel Vadot############
133*5d8c2d4cSEmmanuel Vadot# Set quiet mode if requested
134*5d8c2d4cSEmmanuel Vadot#
135*5d8c2d4cSEmmanuel Vadotcase ${firewall_quiet} in
136*5d8c2d4cSEmmanuel Vadot[Yy][Ee][Ss])
137*5d8c2d4cSEmmanuel Vadot	fwcmd="/sbin/ipfw -q"
138*5d8c2d4cSEmmanuel Vadot	;;
139*5d8c2d4cSEmmanuel Vadot*)
140*5d8c2d4cSEmmanuel Vadot	fwcmd="/sbin/ipfw"
141*5d8c2d4cSEmmanuel Vadot	;;
142*5d8c2d4cSEmmanuel Vadotesac
143*5d8c2d4cSEmmanuel Vadot
144*5d8c2d4cSEmmanuel Vadot############
145*5d8c2d4cSEmmanuel Vadot# Flush out the list before we begin.
146*5d8c2d4cSEmmanuel Vadot#
147*5d8c2d4cSEmmanuel Vadot${fwcmd} -f flush
148*5d8c2d4cSEmmanuel Vadot
149*5d8c2d4cSEmmanuel Vadotsetup_loopback
150*5d8c2d4cSEmmanuel Vadotsetup_ipv6_mandatory
151*5d8c2d4cSEmmanuel Vadot
152*5d8c2d4cSEmmanuel Vadot############
153*5d8c2d4cSEmmanuel Vadot# Network Address Translation.  All packets are passed to natd(8)
154*5d8c2d4cSEmmanuel Vadot# before they encounter your remaining rules.  The firewall rules
155*5d8c2d4cSEmmanuel Vadot# will then be run again on each packet after translation by natd
156*5d8c2d4cSEmmanuel Vadot# starting at the rule number following the divert rule.
157*5d8c2d4cSEmmanuel Vadot#
158*5d8c2d4cSEmmanuel Vadot# For ``simple'' firewall type the divert rule should be put to a
159*5d8c2d4cSEmmanuel Vadot# different place to not interfere with address-checking rules.
160*5d8c2d4cSEmmanuel Vadot#
161*5d8c2d4cSEmmanuel Vadotcase ${firewall_type} in
162*5d8c2d4cSEmmanuel Vadot[Oo][Pp][Ee][Nn]|[Cc][Ll][Ii][Ee][Nn][Tt])
163*5d8c2d4cSEmmanuel Vadot	case ${natd_enable} in
164*5d8c2d4cSEmmanuel Vadot	[Yy][Ee][Ss])
165*5d8c2d4cSEmmanuel Vadot		if [ -n "${natd_interface}" ]; then
166*5d8c2d4cSEmmanuel Vadot			${fwcmd} add 50 divert natd ip4 from any to any via ${natd_interface}
167*5d8c2d4cSEmmanuel Vadot		fi
168*5d8c2d4cSEmmanuel Vadot		;;
169*5d8c2d4cSEmmanuel Vadot	esac
170*5d8c2d4cSEmmanuel Vadot	case ${firewall_nat_enable} in
171*5d8c2d4cSEmmanuel Vadot	[Yy][Ee][Ss])
172*5d8c2d4cSEmmanuel Vadot		if [ -n "${firewall_nat_interface}" ]; then
173*5d8c2d4cSEmmanuel Vadot			if echo "${firewall_nat_interface}" | \
174*5d8c2d4cSEmmanuel Vadot				grep -q -E '^[0-9]+(\.[0-9]+){0,3}$'; then
175*5d8c2d4cSEmmanuel Vadot				firewall_nat_flags="ip ${firewall_nat_interface} ${firewall_nat_flags}"
176*5d8c2d4cSEmmanuel Vadot			else
177*5d8c2d4cSEmmanuel Vadot				firewall_nat_flags="if ${firewall_nat_interface} ${firewall_nat_flags}"
178*5d8c2d4cSEmmanuel Vadot			fi
179*5d8c2d4cSEmmanuel Vadot			${fwcmd} nat 123 config log ${firewall_nat_flags}
180*5d8c2d4cSEmmanuel Vadot			${fwcmd} add 50 nat 123 ip4 from any to any via ${firewall_nat_interface}
181*5d8c2d4cSEmmanuel Vadot		fi
182*5d8c2d4cSEmmanuel Vadot		;;
183*5d8c2d4cSEmmanuel Vadot	esac
184*5d8c2d4cSEmmanuel Vadotesac
185*5d8c2d4cSEmmanuel Vadot
186*5d8c2d4cSEmmanuel Vadot############
187*5d8c2d4cSEmmanuel Vadot# If you just configured ipfw in the kernel as a tool to solve network
188*5d8c2d4cSEmmanuel Vadot# problems or you just want to disallow some particular kinds of traffic
189*5d8c2d4cSEmmanuel Vadot# then you will want to change the default policy to open.  You can also
190*5d8c2d4cSEmmanuel Vadot# do this as your only action by setting the firewall_type to ``open''.
191*5d8c2d4cSEmmanuel Vadot#
192*5d8c2d4cSEmmanuel Vadot# ${fwcmd} add 65000 pass all from any to any
193*5d8c2d4cSEmmanuel Vadot
194*5d8c2d4cSEmmanuel Vadot
195*5d8c2d4cSEmmanuel Vadot# Prototype setups.
196*5d8c2d4cSEmmanuel Vadot#
197*5d8c2d4cSEmmanuel Vadotcase ${firewall_type} in
198*5d8c2d4cSEmmanuel Vadot[Oo][Pp][Ee][Nn])
199*5d8c2d4cSEmmanuel Vadot	${fwcmd} add 65000 pass all from any to any
200*5d8c2d4cSEmmanuel Vadot	;;
201*5d8c2d4cSEmmanuel Vadot
202*5d8c2d4cSEmmanuel Vadot[Cc][Ll][Ii][Ee][Nn][Tt])
203*5d8c2d4cSEmmanuel Vadot	############
204*5d8c2d4cSEmmanuel Vadot	# This is a prototype setup that will protect your system somewhat
205*5d8c2d4cSEmmanuel Vadot	# against people from outside your own network.
206*5d8c2d4cSEmmanuel Vadot	#
207*5d8c2d4cSEmmanuel Vadot	# Configuration:
208*5d8c2d4cSEmmanuel Vadot	#  firewall_client_net:		Network address of local IPv4 network.
209*5d8c2d4cSEmmanuel Vadot	#  firewall_client_net_ipv6:	Network address of local IPv6 network.
210*5d8c2d4cSEmmanuel Vadot	############
211*5d8c2d4cSEmmanuel Vadot
212*5d8c2d4cSEmmanuel Vadot	# set this to your local network
213*5d8c2d4cSEmmanuel Vadot	net="$firewall_client_net"
214*5d8c2d4cSEmmanuel Vadot	net6="$firewall_client_net_ipv6"
215*5d8c2d4cSEmmanuel Vadot
216*5d8c2d4cSEmmanuel Vadot	# Allow limited broadcast traffic from my own net.
217*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass all from ${net} to 255.255.255.255
218*5d8c2d4cSEmmanuel Vadot
219*5d8c2d4cSEmmanuel Vadot	# Allow any traffic to or from my own net.
220*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass all from me to ${net}
221*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass all from ${net} to me
222*5d8c2d4cSEmmanuel Vadot	if [ -n "$net6" ]; then
223*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass all from me to ${net6}
224*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass all from ${net6} to me
225*5d8c2d4cSEmmanuel Vadot	fi
226*5d8c2d4cSEmmanuel Vadot
227*5d8c2d4cSEmmanuel Vadot	if [ -n "$net6" ]; then
228*5d8c2d4cSEmmanuel Vadot		# Allow any link-local multicast traffic
229*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass all from fe80::/10 to ff02::/16
230*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass all from ${net6} to ff02::/16
231*5d8c2d4cSEmmanuel Vadot		# Allow DHCPv6
232*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass udp from fe80::/10 to me 546
233*5d8c2d4cSEmmanuel Vadot	fi
234*5d8c2d4cSEmmanuel Vadot
235*5d8c2d4cSEmmanuel Vadot	# Allow TCP through if setup succeeded
236*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from any to any established
237*5d8c2d4cSEmmanuel Vadot
238*5d8c2d4cSEmmanuel Vadot	# Allow IP fragments to pass through
239*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass all from any to any frag
240*5d8c2d4cSEmmanuel Vadot
241*5d8c2d4cSEmmanuel Vadot	# Allow setup of incoming email
242*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from any to me 25 setup
243*5d8c2d4cSEmmanuel Vadot
244*5d8c2d4cSEmmanuel Vadot	# Allow setup of outgoing TCP connections only
245*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from me to any setup
246*5d8c2d4cSEmmanuel Vadot
247*5d8c2d4cSEmmanuel Vadot	# Disallow setup of all other TCP connections
248*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny tcp from any to any setup
249*5d8c2d4cSEmmanuel Vadot
250*5d8c2d4cSEmmanuel Vadot	# Allow DNS queries out in the world
251*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp from me to any 53 keep-state
252*5d8c2d4cSEmmanuel Vadot
253*5d8c2d4cSEmmanuel Vadot	# Allow NTP queries out in the world
254*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp from me to any 123 keep-state
255*5d8c2d4cSEmmanuel Vadot
256*5d8c2d4cSEmmanuel Vadot	# Everything else is denied by default, unless the
257*5d8c2d4cSEmmanuel Vadot	# IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
258*5d8c2d4cSEmmanuel Vadot	# config file.
259*5d8c2d4cSEmmanuel Vadot	;;
260*5d8c2d4cSEmmanuel Vadot
261*5d8c2d4cSEmmanuel Vadot[Ss][Ii][Mm][Pp][Ll][Ee])
262*5d8c2d4cSEmmanuel Vadot	############
263*5d8c2d4cSEmmanuel Vadot	# This is a prototype setup for a simple firewall.  Configure this
264*5d8c2d4cSEmmanuel Vadot	# machine as a DNS and NTP server, and point all the machines
265*5d8c2d4cSEmmanuel Vadot	# on the inside at this machine for those services.
266*5d8c2d4cSEmmanuel Vadot	#
267*5d8c2d4cSEmmanuel Vadot	# Configuration:
268*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_iif:		Inside IPv4 network interface.
269*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_inet:	Inside IPv4 network address.
270*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_oif:		Outside IPv4 network interface.
271*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_onet:	Outside IPv4 network address.
272*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_iif_ipv6:	Inside IPv6 network interface.
273*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_inet_ipv6:	Inside IPv6 network prefix.
274*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_oif_ipv6:	Outside IPv6 network interface.
275*5d8c2d4cSEmmanuel Vadot	#  firewall_simple_onet_ipv6:	Outside IPv6 network prefix.
276*5d8c2d4cSEmmanuel Vadot	############
277*5d8c2d4cSEmmanuel Vadot	BAD_ADDR_TBL=13
278*5d8c2d4cSEmmanuel Vadot
279*5d8c2d4cSEmmanuel Vadot	# set these to your outside interface network
280*5d8c2d4cSEmmanuel Vadot	oif="$firewall_simple_oif"
281*5d8c2d4cSEmmanuel Vadot	onet="$firewall_simple_onet"
282*5d8c2d4cSEmmanuel Vadot	oif6="${firewall_simple_oif_ipv6:-$firewall_simple_oif}"
283*5d8c2d4cSEmmanuel Vadot	onet6="$firewall_simple_onet_ipv6"
284*5d8c2d4cSEmmanuel Vadot
285*5d8c2d4cSEmmanuel Vadot	# set these to your inside interface network
286*5d8c2d4cSEmmanuel Vadot	iif="$firewall_simple_iif"
287*5d8c2d4cSEmmanuel Vadot	inet="$firewall_simple_inet"
288*5d8c2d4cSEmmanuel Vadot	iif6="${firewall_simple_iif_ipv6:-$firewall_simple_iif}"
289*5d8c2d4cSEmmanuel Vadot	inet6="$firewall_simple_inet_ipv6"
290*5d8c2d4cSEmmanuel Vadot
291*5d8c2d4cSEmmanuel Vadot	# Stop spoofing
292*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny all from ${inet} to any in via ${oif}
293*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny all from ${onet} to any in via ${iif}
294*5d8c2d4cSEmmanuel Vadot	if [ -n "$inet6" ]; then
295*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ${inet6} to any in via ${oif6}
296*5d8c2d4cSEmmanuel Vadot		if [ -n "$onet6" ]; then
297*5d8c2d4cSEmmanuel Vadot			${fwcmd} add deny all from ${onet6} to any in \
298*5d8c2d4cSEmmanuel Vadot			    via ${iif6}
299*5d8c2d4cSEmmanuel Vadot		fi
300*5d8c2d4cSEmmanuel Vadot	fi
301*5d8c2d4cSEmmanuel Vadot
302*5d8c2d4cSEmmanuel Vadot	# Define stuff we should never send out or receive in.
303*5d8c2d4cSEmmanuel Vadot	# Stop RFC1918 nets on the outside interface
304*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} flush
305*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 10.0.0.0/8
306*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 172.16.0.0/12
307*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 192.168.0.0/16
308*5d8c2d4cSEmmanuel Vadot
309*5d8c2d4cSEmmanuel Vadot	# And stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
310*5d8c2d4cSEmmanuel Vadot	# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
311*5d8c2d4cSEmmanuel Vadot	# on the outside interface
312*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 0.0.0.0/8
313*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 169.254.0.0/16
314*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 192.0.2.0/24
315*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 224.0.0.0/4
316*5d8c2d4cSEmmanuel Vadot	${fwcmd} table ${BAD_ADDR_TBL} add 240.0.0.0/4
317*5d8c2d4cSEmmanuel Vadot
318*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny all from any to "table($BAD_ADDR_TBL)" via ${oif}
319*5d8c2d4cSEmmanuel Vadot
320*5d8c2d4cSEmmanuel Vadot	# Network Address Translation.  This rule is placed here deliberately
321*5d8c2d4cSEmmanuel Vadot	# so that it does not interfere with the surrounding address-checking
322*5d8c2d4cSEmmanuel Vadot	# rules.  If for example one of your internal LAN machines had its IP
323*5d8c2d4cSEmmanuel Vadot	# address set to 192.0.2.1 then an incoming packet for it after being
324*5d8c2d4cSEmmanuel Vadot	# translated by natd(8) would match the `deny' rule above.  Similarly
325*5d8c2d4cSEmmanuel Vadot	# an outgoing packet originated from it before being translated would
326*5d8c2d4cSEmmanuel Vadot	# match the `deny' rule below.
327*5d8c2d4cSEmmanuel Vadot	case ${natd_enable} in
328*5d8c2d4cSEmmanuel Vadot	[Yy][Ee][Ss])
329*5d8c2d4cSEmmanuel Vadot		if [ -n "${natd_interface}" ]; then
330*5d8c2d4cSEmmanuel Vadot			${fwcmd} add divert natd ip4 from any to any via ${natd_interface}
331*5d8c2d4cSEmmanuel Vadot		fi
332*5d8c2d4cSEmmanuel Vadot		;;
333*5d8c2d4cSEmmanuel Vadot	esac
334*5d8c2d4cSEmmanuel Vadot
335*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny all from "table($BAD_ADDR_TBL)" to any via ${oif}
336*5d8c2d4cSEmmanuel Vadot	if [ -n "$inet6" ]; then
337*5d8c2d4cSEmmanuel Vadot		# Stop unique local unicast address on the outside interface
338*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from fc00::/7 to any via ${oif6}
339*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to fc00::/7 via ${oif6}
340*5d8c2d4cSEmmanuel Vadot
341*5d8c2d4cSEmmanuel Vadot		# Stop site-local on the outside interface
342*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from fec0::/10 to any via ${oif6}
343*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to fec0::/10 via ${oif6}
344*5d8c2d4cSEmmanuel Vadot
345*5d8c2d4cSEmmanuel Vadot		# Disallow "internal" addresses to appear on the wire.
346*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ::ffff:0.0.0.0/96 to any \
347*5d8c2d4cSEmmanuel Vadot		    via ${oif6}
348*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to ::ffff:0.0.0.0/96 \
349*5d8c2d4cSEmmanuel Vadot		    via ${oif6}
350*5d8c2d4cSEmmanuel Vadot
351*5d8c2d4cSEmmanuel Vadot		# Disallow packets to malicious IPv4 compatible prefix.
352*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ::224.0.0.0/100 to any via ${oif6}
353*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to ::224.0.0.0/100 via ${oif6}
354*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ::127.0.0.0/104 to any via ${oif6}
355*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to ::127.0.0.0/104 via ${oif6}
356*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ::0.0.0.0/104 to any via ${oif6}
357*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to ::0.0.0.0/104 via ${oif6}
358*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ::255.0.0.0/104 to any via ${oif6}
359*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to ::255.0.0.0/104 via ${oif6}
360*5d8c2d4cSEmmanuel Vadot
361*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ::0.0.0.0/96 to any via ${oif6}
362*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to ::0.0.0.0/96 via ${oif6}
363*5d8c2d4cSEmmanuel Vadot
364*5d8c2d4cSEmmanuel Vadot		# Disallow packets to malicious 6to4 prefix.
365*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from 2002:e000::/20 to any via ${oif6}
366*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to 2002:e000::/20 via ${oif6}
367*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from 2002:7f00::/24 to any via ${oif6}
368*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to 2002:7f00::/24 via ${oif6}
369*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from 2002:0000::/24 to any via ${oif6}
370*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to 2002:0000::/24 via ${oif6}
371*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from 2002:ff00::/24 to any via ${oif6}
372*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to 2002:ff00::/24 via ${oif6}
373*5d8c2d4cSEmmanuel Vadot
374*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from 2002:0a00::/24 to any via ${oif6}
375*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to 2002:0a00::/24 via ${oif6}
376*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from 2002:ac10::/28 to any via ${oif6}
377*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to 2002:ac10::/28 via ${oif6}
378*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from 2002:c0a8::/32 to any via ${oif6}
379*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to 2002:c0a8::/32 via ${oif6}
380*5d8c2d4cSEmmanuel Vadot
381*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from ff05::/16 to any via ${oif6}
382*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny all from any to ff05::/16 via ${oif6}
383*5d8c2d4cSEmmanuel Vadot	fi
384*5d8c2d4cSEmmanuel Vadot
385*5d8c2d4cSEmmanuel Vadot	# Allow TCP through if setup succeeded
386*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from any to any established
387*5d8c2d4cSEmmanuel Vadot
388*5d8c2d4cSEmmanuel Vadot	# Allow IP fragments to pass through
389*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass all from any to any frag
390*5d8c2d4cSEmmanuel Vadot
391*5d8c2d4cSEmmanuel Vadot	# Allow setup of incoming email
392*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from any to me 25 setup
393*5d8c2d4cSEmmanuel Vadot
394*5d8c2d4cSEmmanuel Vadot	# Allow access to our DNS
395*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from any to me 53 setup
396*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp from any to me 53
397*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp from me 53 to any
398*5d8c2d4cSEmmanuel Vadot
399*5d8c2d4cSEmmanuel Vadot	# Allow access to our WWW
400*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from any to me 80 setup
401*5d8c2d4cSEmmanuel Vadot
402*5d8c2d4cSEmmanuel Vadot	# Reject&Log all setup of incoming connections from the outside
403*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny log ip4 from any to any in via ${oif} setup proto tcp
404*5d8c2d4cSEmmanuel Vadot	if [ -n "$inet6" ]; then
405*5d8c2d4cSEmmanuel Vadot		${fwcmd} add deny log ip6 from any to any in via ${oif6} \
406*5d8c2d4cSEmmanuel Vadot		    setup proto tcp
407*5d8c2d4cSEmmanuel Vadot	fi
408*5d8c2d4cSEmmanuel Vadot
409*5d8c2d4cSEmmanuel Vadot	# Allow setup of any other TCP connection
410*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp from any to any setup
411*5d8c2d4cSEmmanuel Vadot
412*5d8c2d4cSEmmanuel Vadot	# Allow DNS queries out in the world
413*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp from me to any 53 keep-state
414*5d8c2d4cSEmmanuel Vadot
415*5d8c2d4cSEmmanuel Vadot	# Allow NTP queries out in the world
416*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp from me to any 123 keep-state
417*5d8c2d4cSEmmanuel Vadot
418*5d8c2d4cSEmmanuel Vadot	# Everything else is denied by default, unless the
419*5d8c2d4cSEmmanuel Vadot	# IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
420*5d8c2d4cSEmmanuel Vadot	# config file.
421*5d8c2d4cSEmmanuel Vadot	;;
422*5d8c2d4cSEmmanuel Vadot
423*5d8c2d4cSEmmanuel Vadot[Ww][Oo][Rr][Kk][Ss][Tt][Aa][Tt][Ii][Oo][Nn])
424*5d8c2d4cSEmmanuel Vadot	# Configuration:
425*5d8c2d4cSEmmanuel Vadot	#  firewall_myservices:		List of ports/protocols on which this
426*5d8c2d4cSEmmanuel Vadot	#				 host offers services.
427*5d8c2d4cSEmmanuel Vadot	#  firewall_allowservices:	List of IPv4 and/or IPv6 addresses
428*5d8c2d4cSEmmanuel Vadot	#				 that have access to
429*5d8c2d4cSEmmanuel Vadot	#				 $firewall_myservices.
430*5d8c2d4cSEmmanuel Vadot	#  firewall_trusted:		List of IPv4 and/or IPv6 addresses
431*5d8c2d4cSEmmanuel Vadot	#				 that have full access to this host.
432*5d8c2d4cSEmmanuel Vadot	#				 Be very careful when setting this.
433*5d8c2d4cSEmmanuel Vadot	#				 This option can seriously degrade
434*5d8c2d4cSEmmanuel Vadot	#				 the level of protection provided by
435*5d8c2d4cSEmmanuel Vadot	#				 the firewall.
436*5d8c2d4cSEmmanuel Vadot	#  firewall_logdeny:		Boolean (YES/NO) specifying if the
437*5d8c2d4cSEmmanuel Vadot	#				 default denied packets should be
438*5d8c2d4cSEmmanuel Vadot	#				 logged (in /var/log/security).
439*5d8c2d4cSEmmanuel Vadot	#  firewall_nologports:		List of TCP/UDP ports for which
440*5d8c2d4cSEmmanuel Vadot	#				 denied incoming packets are not
441*5d8c2d4cSEmmanuel Vadot	#				 logged.
442*5d8c2d4cSEmmanuel Vadot
443*5d8c2d4cSEmmanuel Vadot	# Allow packets for which a state has been built.
444*5d8c2d4cSEmmanuel Vadot	${fwcmd} add check-state
445*5d8c2d4cSEmmanuel Vadot
446*5d8c2d4cSEmmanuel Vadot	# For services permitted below.
447*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp  from me to any established
448*5d8c2d4cSEmmanuel Vadot
449*5d8c2d4cSEmmanuel Vadot	# Allow any connection out, adding state for each.
450*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass tcp  from me to any setup keep-state
451*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp  from me to any       keep-state
452*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass icmp from me to any       keep-state
453*5d8c2d4cSEmmanuel Vadot	if [ $ipv6_available -eq 0 ]; then
454*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass ipv6-icmp from me to any keep-state
455*5d8c2d4cSEmmanuel Vadot	fi
456*5d8c2d4cSEmmanuel Vadot
457*5d8c2d4cSEmmanuel Vadot	# Allow DHCP.
458*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp  from 0.0.0.0 68 to 255.255.255.255 67 out
459*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp  from any 67     to me 68 in
460*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass udp  from any 67     to 255.255.255.255 68 in
461*5d8c2d4cSEmmanuel Vadot	if [ $ipv6_available -eq 0 ]; then
462*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass udp from fe80::/10 to me 546 in
463*5d8c2d4cSEmmanuel Vadot	fi
464*5d8c2d4cSEmmanuel Vadot	# Some servers will ping the IP while trying to decide if it's
465*5d8c2d4cSEmmanuel Vadot	# still in use.
466*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass icmp from any to any icmptype 8
467*5d8c2d4cSEmmanuel Vadot	if [ $ipv6_available -eq 0 ]; then
468*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass ipv6-icmp from any to any icmp6type 128,129
469*5d8c2d4cSEmmanuel Vadot	fi
470*5d8c2d4cSEmmanuel Vadot
471*5d8c2d4cSEmmanuel Vadot	# Allow "mandatory" ICMP in.
472*5d8c2d4cSEmmanuel Vadot	${fwcmd} add pass icmp from any to any icmptype 3,4,11
473*5d8c2d4cSEmmanuel Vadot	if [ $ipv6_available -eq 0 ]; then
474*5d8c2d4cSEmmanuel Vadot		${fwcmd} add pass ipv6-icmp from any to any icmp6type 3
475*5d8c2d4cSEmmanuel Vadot	fi
476*5d8c2d4cSEmmanuel Vadot
477*5d8c2d4cSEmmanuel Vadot	# Add permits for this workstations published services below
478*5d8c2d4cSEmmanuel Vadot	# Only IPs and nets in firewall_allowservices is allowed in.
479*5d8c2d4cSEmmanuel Vadot	# If you really wish to let anyone use services on your
480*5d8c2d4cSEmmanuel Vadot	# workstation, then set "firewall_allowservices='any'" in /etc/rc.conf
481*5d8c2d4cSEmmanuel Vadot	#
482*5d8c2d4cSEmmanuel Vadot	# Note: We don't use keep-state as that would allow DoS of
483*5d8c2d4cSEmmanuel Vadot	#       our statetable.
484*5d8c2d4cSEmmanuel Vadot	#       You can add 'keep-state' to the lines for slightly
485*5d8c2d4cSEmmanuel Vadot	#       better performance if you fell that DoS of your
486*5d8c2d4cSEmmanuel Vadot	#       workstation won't be a problem.
487*5d8c2d4cSEmmanuel Vadot	#
488*5d8c2d4cSEmmanuel Vadot	for i in ${firewall_allowservices} ; do
489*5d8c2d4cSEmmanuel Vadot	  for j in ${firewall_myservices} ; do
490*5d8c2d4cSEmmanuel Vadot	    case $j in
491*5d8c2d4cSEmmanuel Vadot	    [0-9A-Za-z]*/[Pp][Rr][Oo][Tt][Oo])
492*5d8c2d4cSEmmanuel Vadot	      ${fwcmd} add pass ${j%/[Pp][Rr][Oo][Tt][Oo]} from $i to me
493*5d8c2d4cSEmmanuel Vadot	    ;;
494*5d8c2d4cSEmmanuel Vadot	    [0-9A-Za-z]*/[Tt][Cc][Pp])
495*5d8c2d4cSEmmanuel Vadot	      ${fwcmd} add pass tcp from $i to me ${j%/[Tt][Cc][Pp]}
496*5d8c2d4cSEmmanuel Vadot	    ;;
497*5d8c2d4cSEmmanuel Vadot	    [0-9A-Za-z]*/[Uu][Dd][Pp])
498*5d8c2d4cSEmmanuel Vadot	      ${fwcmd} add pass udp from $i to me ${j%/[Uu][Dd][Pp]}
499*5d8c2d4cSEmmanuel Vadot	    ;;
500*5d8c2d4cSEmmanuel Vadot	    *[0-9A-Za-z])
501*5d8c2d4cSEmmanuel Vadot	      echo "Consider using ${j}/tcp in firewall_myservices." \
502*5d8c2d4cSEmmanuel Vadot	        > /dev/stderr
503*5d8c2d4cSEmmanuel Vadot	      ${fwcmd} add pass tcp from $i to me $j
504*5d8c2d4cSEmmanuel Vadot	    ;;
505*5d8c2d4cSEmmanuel Vadot	    *)
506*5d8c2d4cSEmmanuel Vadot	      echo "Invalid port in firewall_myservices: $j" > /dev/stderr
507*5d8c2d4cSEmmanuel Vadot	    ;;
508*5d8c2d4cSEmmanuel Vadot	    esac
509*5d8c2d4cSEmmanuel Vadot	  done
510*5d8c2d4cSEmmanuel Vadot	done
511*5d8c2d4cSEmmanuel Vadot
512*5d8c2d4cSEmmanuel Vadot	# Allow all connections from trusted IPs.
513*5d8c2d4cSEmmanuel Vadot	# Playing with the content of firewall_trusted could seriously
514*5d8c2d4cSEmmanuel Vadot	# degrade the level of protection provided by the firewall.
515*5d8c2d4cSEmmanuel Vadot	for i in ${firewall_trusted} ; do
516*5d8c2d4cSEmmanuel Vadot	  ${fwcmd} add pass ip from $i to me
517*5d8c2d4cSEmmanuel Vadot	done
518*5d8c2d4cSEmmanuel Vadot
519*5d8c2d4cSEmmanuel Vadot	${fwcmd} add 65000 count ip from any to any
520*5d8c2d4cSEmmanuel Vadot
521*5d8c2d4cSEmmanuel Vadot	# Drop packets to ports where we don't want logging
522*5d8c2d4cSEmmanuel Vadot	for i in ${firewall_nologports} ; do
523*5d8c2d4cSEmmanuel Vadot	  ${fwcmd} add deny { tcp or udp } from any to any $i in
524*5d8c2d4cSEmmanuel Vadot	done
525*5d8c2d4cSEmmanuel Vadot
526*5d8c2d4cSEmmanuel Vadot	# Broadcasts and multicasts
527*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny ip  from any to 255.255.255.255
528*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny ip  from any to 224.0.0.0/24 in	# XXX
529*5d8c2d4cSEmmanuel Vadot
530*5d8c2d4cSEmmanuel Vadot	# Noise from routers
531*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny udp from any to any 520 in
532*5d8c2d4cSEmmanuel Vadot
533*5d8c2d4cSEmmanuel Vadot	# Noise from webbrowsing.
534*5d8c2d4cSEmmanuel Vadot	# The stateful filter is a bit aggressive, and will cause some
535*5d8c2d4cSEmmanuel Vadot	#  connection teardowns to be logged.
536*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny tcp from any 80,443 to any 1024-65535 in
537*5d8c2d4cSEmmanuel Vadot
538*5d8c2d4cSEmmanuel Vadot	# Deny and (if wanted) log the rest unconditionally.
539*5d8c2d4cSEmmanuel Vadot	log=""
540*5d8c2d4cSEmmanuel Vadot	if [ ${firewall_logdeny:-x} = "YES" -o ${firewall_logdeny:-x} = "yes" ] ; then
541*5d8c2d4cSEmmanuel Vadot	  log="log logamount 500"	# The default of 100 is too low.
542*5d8c2d4cSEmmanuel Vadot	  sysctl net.inet.ip.fw.verbose=1 >/dev/null
543*5d8c2d4cSEmmanuel Vadot	fi
544*5d8c2d4cSEmmanuel Vadot	${fwcmd} add deny $log ip from any to any
545*5d8c2d4cSEmmanuel Vadot	;;
546*5d8c2d4cSEmmanuel Vadot
547*5d8c2d4cSEmmanuel Vadot[Cc][Ll][Oo][Ss][Ee][Dd])
548*5d8c2d4cSEmmanuel Vadot	${fwcmd} add 65000 deny ip from any to any
549*5d8c2d4cSEmmanuel Vadot	;;
550*5d8c2d4cSEmmanuel Vadot[Uu][Nn][Kk][Nn][Oo][Ww][Nn])
551*5d8c2d4cSEmmanuel Vadot	;;
552*5d8c2d4cSEmmanuel Vadot*)
553*5d8c2d4cSEmmanuel Vadot	if [ -r "${firewall_type}" ]; then
554*5d8c2d4cSEmmanuel Vadot		${fwcmd} ${firewall_flags} ${firewall_type}
555*5d8c2d4cSEmmanuel Vadot	fi
556*5d8c2d4cSEmmanuel Vadot	;;
557*5d8c2d4cSEmmanuel Vadotesac
558