Initial import from FreeBSD RELENG_4:
[dragonfly.git] / etc / rc.firewall6
CommitLineData
984263bc
MD
1#!/bin/sh
2############
3# Setup system for IPv6 firewall service.
4# $FreeBSD: src/etc/rc.firewall6,v 1.1.2.11 2003/02/10 05:45:06 trhodes Exp $
5
6# Suck in the configuration variables.
7if [ -z "${source_rc_confs_defined}" ]; then
8 if [ -r /etc/defaults/rc.conf ]; then
9 . /etc/defaults/rc.conf
10 source_rc_confs
11 elif [ -r /etc/rc.conf ]; then
12 . /etc/rc.conf
13 fi
14fi
15
16############
17# Define the firewall type in /etc/rc.conf. Valid values are:
18# open - will allow anyone in
19# client - will try to protect just this machine
20# simple - will try to protect a whole network
21# closed - totally disables IP services except via lo0 interface
22# UNKNOWN - disables the loading of firewall rules.
23# filename - will load the rules in the given filename (full path required)
24#
25# For ``client'' and ``simple'' the entries below should be customized
26# appropriately.
27
28############
29#
30# If you don't know enough about packet filtering, we suggest that you
31# take time to read this book:
32#
33# Building Internet Firewalls, 2nd Edition
34# Brent Chapman and Elizabeth Zwicky
35#
36# O'Reilly & Associates, Inc
37# ISBN 1-56592-871-7
38# http://www.ora.com/
39# http://www.oreilly.com/catalog/fire2/
40#
41# For a more advanced treatment of Internet Security read:
42#
43# Firewalls & Internet Security
44# Repelling the wily hacker
45# William R. Cheswick, Steven M. Bellowin
46#
47# Addison-Wesley
48# ISBN 0-201-63357-4
49# http://www.awl.com/
50# http://www.awlonline.com/product/0%2C2627%2C0201633574%2C00.html
51#
52
53setup_local () {
54 ############
55 # Only in rare cases do you want to change these rules
56 #
57 ${fw6cmd} add 100 pass all from any to any via lo0
58 #
59 # ND
60 #
61 # DAD
62 ${fw6cmd} add pass ipv6-icmp from :: to ff02::/16
63 # RS, RA, NS, NA, redirect...
64 ${fw6cmd} add pass ipv6-icmp from fe80::/10 to fe80::/10
65 ${fw6cmd} add pass ipv6-icmp from fe80::/10 to ff02::/16
66}
67
68if [ -n "${1}" ]; then
69 ipv6_firewall_type="${1}"
70fi
71
72############
73# Set quiet mode if requested
74#
75case ${ipv6_firewall_quiet} in
76[Yy][Ee][Ss])
77 fw6cmd="/sbin/ip6fw -q"
78 ;;
79*)
80 fw6cmd="/sbin/ip6fw"
81 ;;
82esac
83
84############
85# Flush out the list before we begin.
86#
87${fw6cmd} -f flush
88
89############
90# If you just configured ipfw in the kernel as a tool to solve network
91# problems or you just want to disallow some particular kinds of traffic
92# then you will want to change the default policy to open. You can also
93# do this as your only action by setting the ipv6_firewall_type to ``open''.
94#
95# ${fw6cmd} add 65000 pass all from any to any
96
97
98# Prototype setups.
99#
100case ${ipv6_firewall_type} in
101[Oo][Pp][Ee][Nn])
102 setup_local
103 ${fw6cmd} add 65000 pass all from any to any
104 ;;
105
106[Cc][Ll][Ii][Ee][Nn][Tt])
107 ############
108 # This is a prototype setup that will protect your system somewhat
109 # against people from outside your own network.
110 ############
111
112 # set these to your network and prefixlen and ip
113 #
114 # This needs more work
115 #
116 net="3ffe:505:2:1::"
117 prefixlen="64"
118 ip="3ffe:505:2:1::1"
119
120 setup_local
121
122 # Allow any traffic to or from my own net.
123 ${fw6cmd} add pass all from ${ip} to ${net}/${prefixlen}
124 ${fw6cmd} add pass all from ${net}/${prefixlen} to ${ip}
125
126 # Allow any link-local multicast traffic
127 ${fw6cmd} add pass all from fe80::/10 to ff02::/16
128 ${fw6cmd} add pass all from ${net}/${prefixlen} to ff02::/16
129
130 # Allow TCP through if setup succeeded
131 ${fw6cmd} add pass tcp from any to any established
132
133 # Allow IP fragments to pass through
134 ${fw6cmd} add pass all from any to any frag
135
136 # Allow setup of incoming email
137 ${fw6cmd} add pass tcp from any to ${ip} 25 setup
138
139 # Allow setup of outgoing TCP connections only
140 ${fw6cmd} add pass tcp from ${ip} to any setup
141
142 # Disallow setup of all other TCP connections
143 ${fw6cmd} add deny tcp from any to any setup
144
145 # Allow DNS queries out in the world
146 ${fw6cmd} add pass udp from any 53 to ${ip}
147 ${fw6cmd} add pass udp from ${ip} to any 53
148
149 # Allow NTP queries out in the world
150 ${fw6cmd} add pass udp from any 123 to ${ip}
151 ${fw6cmd} add pass udp from ${ip} to any 123
152
153 # Allow ICMPv6 destination unreach
154 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
155
156 # Allow NS/NA/toobig (don't filter it out)
157 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
158
159 # Everything else is denied by default, unless the
160 # IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
161 # config file.
162 ;;
163
164[Ss][Ii][Mm][Pp][Ll][Ee])
165 ############
166 # This is a prototype setup for a simple firewall. Configure this
167 # machine as a named server and ntp server, and point all the machines
168 # on the inside at this machine for those services.
169 ############
170
171 # set these to your outside interface network and prefixlen and ip
172 oif="ed0"
173 onet="3ffe:505:2:1::"
174 oprefixlen="64"
175 oip="3ffe:505:2:1::1"
176
177 # set these to your inside interface network and prefixlen and ip
178 iif="ed1"
179 inet="3ffe:505:2:2::"
180 iprefixlen="64"
181 iip="3ffe:505:2:2::1"
182
183 setup_local
184
185 # Stop spoofing
186 ${fw6cmd} add deny all from ${inet}/${iprefixlen} to any in via ${oif}
187 ${fw6cmd} add deny all from ${onet}/${oprefixlen} to any in via ${iif}
188
189 # Stop site-local on the outside interface
190 ${fw6cmd} add deny all from fec0::/10 to any via ${oif}
191 ${fw6cmd} add deny all from any to fec0::/10 via ${oif}
192
193 # Disallow "internal" addresses to appear on the wire.
194 ${fw6cmd} add deny all from ::ffff:0.0.0.0/96 to any via ${oif}
195 ${fw6cmd} add deny all from any to ::ffff:0.0.0.0/96 via ${oif}
196
197 # Disallow packets to malicious IPv4 compatible prefix.
198 ${fw6cmd} add deny all from ::224.0.0.0/100 to any via ${oif}
199 ${fw6cmd} add deny all from any to ::224.0.0.0/100 via ${oif}
200 ${fw6cmd} add deny all from ::127.0.0.0/104 to any via ${oif}
201 ${fw6cmd} add deny all from any to ::127.0.0.0/104 via ${oif}
202 ${fw6cmd} add deny all from ::0.0.0.0/104 to any via ${oif}
203 ${fw6cmd} add deny all from any to ::0.0.0.0/104 via ${oif}
204 ${fw6cmd} add deny all from ::255.0.0.0/104 to any via ${oif}
205 ${fw6cmd} add deny all from any to ::255.0.0.0/104 via ${oif}
206
207 ${fw6cmd} add deny all from ::0.0.0.0/96 to any via ${oif}
208 ${fw6cmd} add deny all from any to ::0.0.0.0/96 via ${oif}
209
210 # Disallow packets to malicious 6to4 prefix.
211 ${fw6cmd} add deny all from 2002:e000::/20 to any via ${oif}
212 ${fw6cmd} add deny all from any to 2002:e000::/20 via ${oif}
213 ${fw6cmd} add deny all from 2002:7f00::/24 to any via ${oif}
214 ${fw6cmd} add deny all from any to 2002:7f00::/24 via ${oif}
215 ${fw6cmd} add deny all from 2002:0000::/24 to any via ${oif}
216 ${fw6cmd} add deny all from any to 2002:0000::/24 via ${oif}
217 ${fw6cmd} add deny all from 2002:ff00::/24 to any via ${oif}
218 ${fw6cmd} add deny all from any to 2002:ff00::/24 via ${oif}
219
220 ${fw6cmd} add deny all from 2002:0a00::/24 to any via ${oif}
221 ${fw6cmd} add deny all from any to 2002:0a00::/24 via ${oif}
222 ${fw6cmd} add deny all from 2002:ac10::/28 to any via ${oif}
223 ${fw6cmd} add deny all from any to 2002:ac10::/28 via ${oif}
224 ${fw6cmd} add deny all from 2002:c0a8::/32 to any via ${oif}
225 ${fw6cmd} add deny all from any to 2002:c0a8::/32 via ${oif}
226
227 ${fw6cmd} add deny all from ff05::/16 to any via ${oif}
228 ${fw6cmd} add deny all from any to ff05::/16 via ${oif}
229
230 # Allow TCP through if setup succeeded
231 ${fw6cmd} add pass tcp from any to any established
232
233 # Allow IP fragments to pass through
234 ${fw6cmd} add pass all from any to any frag
235
236 # Allow setup of incoming email
237 ${fw6cmd} add pass tcp from any to ${oip} 25 setup
238
239 # Allow access to our DNS
240 ${fw6cmd} add pass tcp from any to ${oip} 53 setup
241 ${fw6cmd} add pass udp from any to ${oip} 53
242 ${fw6cmd} add pass udp from ${oip} 53 to any
243
244 # Allow access to our WWW
245 ${fw6cmd} add pass tcp from any to ${oip} 80 setup
246
247 # Reject&Log all setup of incoming connections from the outside
248 ${fw6cmd} add deny log tcp from any to any in via ${oif} setup
249
250 # Allow setup of any other TCP connection
251 ${fw6cmd} add pass tcp from any to any setup
252
253 # Allow DNS queries out in the world
254 ${fw6cmd} add pass udp from any 53 to ${oip}
255 ${fw6cmd} add pass udp from ${oip} to any 53
256
257 # Allow NTP queries out in the world
258 ${fw6cmd} add pass udp from any 123 to ${oip}
259 ${fw6cmd} add pass udp from ${oip} to any 123
260
261 # Allow RIPng
262 #${fw6cmd} add pass udp from fe80::/10 521 to ff02::9 521
263 #${fw6cmd} add pass udp from fe80::/10 521 to fe80::/10 521
264
265 # Allow ICMPv6 destination unreach
266 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
267
268 # Allow NS/NA/toobig (don't filter it out)
269 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
270
271 # Everything else is denied by default, unless the
272 # IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
273 # config file.
274 ;;
275
276[Cc][Ll][Oo][Ss][Ee][Dd])
277 # Only enable the loopback interface
278 ${fw6cmd} add 100 pass all from any to any via lo0
279 ;;
280[Uu][Nn][Kk][Nn][Oo][Ww][Nn])
281 ;;
282*)
283 if [ -r "${ipv6_firewall_type}" ]; then
284 ${fw6cmd} ${ipv6_firewall_flags} ${ipv6_firewall_type}
285 fi
286 ;;
287esac