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 $
6 # Suck in the configuration variables.
7 if [ -z "${source_rc_confs_defined}" ]; then
8 if [ -r /etc/defaults/rc.conf ]; then
9 . /etc/defaults/rc.conf
11 elif [ -r /etc/rc.conf ]; then
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)
25 # For ``client'' and ``simple'' the entries below should be customized
30 # If you don't know enough about packet filtering, we suggest that you
31 # take time to read this book:
33 # Building Internet Firewalls, 2nd Edition
34 # Brent Chapman and Elizabeth Zwicky
36 # O'Reilly & Associates, Inc
39 # http://www.oreilly.com/catalog/fire2/
41 # For a more advanced treatment of Internet Security read:
43 # Firewalls & Internet Security
44 # Repelling the wily hacker
45 # William R. Cheswick, Steven M. Bellowin
50 # http://www.awlonline.com/product/0%2C2627%2C0201633574%2C00.html
55 # Only in rare cases do you want to change these rules
57 ${fw6cmd} add 100 pass all from any to any via lo0
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 ${fw6cmd} add pass ipv6-icmp from fe80::/10 to ff02::/16
68 if [ -n "${1}" ]; then
69 ipv6_firewall_type="${1}"
73 # Set quiet mode if requested
75 case ${ipv6_firewall_quiet} in
77 fw6cmd="/sbin/ip6fw -q"
85 # Flush out the list before we begin.
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''.
95 # ${fw6cmd} add 65000 pass all from any to any
100 case ${ipv6_firewall_type} in
103 ${fw6cmd} add 65000 pass all from any to any
106 [Cc][Ll][Ii][Ee][Nn][Tt])
108 # This is a prototype setup that will protect your system somewhat
109 # against people from outside your own network.
112 # set these to your network and prefixlen and ip
114 # This needs more work
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}
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
130 # Allow TCP through if setup succeeded
131 ${fw6cmd} add pass tcp from any to any established
133 # Allow IP fragments to pass through
134 ${fw6cmd} add pass all from any to any frag
136 # Allow setup of incoming email
137 ${fw6cmd} add pass tcp from any to ${ip} 25 setup
139 # Allow setup of outgoing TCP connections only
140 ${fw6cmd} add pass tcp from ${ip} to any setup
142 # Disallow setup of all other TCP connections
143 ${fw6cmd} add deny tcp from any to any setup
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
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
153 # Allow ICMPv6 destination unreach
154 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
156 # Allow NS/NA/toobig (don't filter it out)
157 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
159 # Everything else is denied by default, unless the
160 # IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
164 [Ss][Ii][Mm][Pp][Ll][Ee])
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.
171 # set these to your outside interface network and prefixlen and ip
173 onet="3ffe:505:2:1::"
175 oip="3ffe:505:2:1::1"
177 # set these to your inside interface network and prefixlen and ip
179 inet="3ffe:505:2:2::"
181 iip="3ffe:505:2:2::1"
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}
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}
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}
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}
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}
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}
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}
227 ${fw6cmd} add deny all from ff05::/16 to any via ${oif}
228 ${fw6cmd} add deny all from any to ff05::/16 via ${oif}
230 # Allow TCP through if setup succeeded
231 ${fw6cmd} add pass tcp from any to any established
233 # Allow IP fragments to pass through
234 ${fw6cmd} add pass all from any to any frag
236 # Allow setup of incoming email
237 ${fw6cmd} add pass tcp from any to ${oip} 25 setup
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
244 # Allow access to our WWW
245 ${fw6cmd} add pass tcp from any to ${oip} 80 setup
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
250 # Allow setup of any other TCP connection
251 ${fw6cmd} add pass tcp from any to any setup
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
257 # Allow NTP queries out in the world
258 ${fw6cmd} add pass udp from any 123 to ${oip}
259 ${fw6cmd} add pass udp from ${oip} to any 123
262 #${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
265 # Allow ICMPv6 destination unreach
266 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
268 # Allow NS/NA/toobig (don't filter it out)
269 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
271 # Everything else is denied by default, unless the
272 # IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
276 [Cc][Ll][Oo][Ss][Ee][Dd])
277 # Only enable the loopback interface
278 ${fw6cmd} add 100 pass all from any to any via lo0
280 [Uu][Nn][Kk][Nn][Oo][Ww][Nn])
283 if [ -r "${ipv6_firewall_type}" ]; then
284 ${fw6cmd} ${ipv6_firewall_flags} ${ipv6_firewall_type}