2 # Setup system for IPv6 firewall service.
5 # Suck in the configuration variables.
6 if [ -z "${source_rc_confs_defined}" ]; then
7 if [ -r /etc/defaults/rc.conf ]; then
8 . /etc/defaults/rc.conf
10 elif [ -r /etc/rc.conf ]; then
16 # Define the firewall type in /etc/rc.conf. Valid values are:
17 # open - will allow anyone in
18 # client - will try to protect just this machine
19 # simple - will try to protect a whole network
20 # closed - totally disables IP services except via lo0 interface
21 # UNKNOWN - disables the loading of firewall rules.
22 # filename - will load the rules in the given filename (full path required)
24 # For ``client'' and ``simple'' the entries below should be customized
29 # If you don't know enough about packet filtering, we suggest that you
30 # take time to read this book:
32 # Building Internet Firewalls, 2nd Edition
33 # Brent Chapman and Elizabeth Zwicky
35 # O'Reilly & Associates, Inc
38 # http://www.oreilly.com/catalog/fire2/
40 # For a more advanced treatment of Internet Security read:
42 # Firewalls & Internet Security
43 # Repelling the wily hacker
44 # William R. Cheswick, Steven M. Bellowin
49 # http://www.awlonline.com/product/0%2C2627%2C0201633574%2C00.html
52 if [ -n "${1}" ]; then
53 ipv6_firewall_type="${1}"
57 # Set quiet mode if requested
59 case ${ipv6_firewall_quiet} in
61 fw6cmd="/sbin/ip6fw -q"
69 # Flush out the list before we begin.
74 # If you just configured ipfw in the kernel as a tool to solve network
75 # problems or you just want to disallow some particular kinds of traffic
76 # then you will want to change the default policy to open. You can also
77 # do this as your only action by setting the ipv6_firewall_type to ``open''.
79 # ${fw6cmd} add 65000 pass all from any to any
82 # Only in rare cases do you want to change these rules
84 ${fw6cmd} add 100 pass all from any to any via lo0
89 ${fw6cmd} add pass ipv6-icmp from ff02::/16 to ::
90 ${fw6cmd} add pass ipv6-icmp from :: to ff02::/16
91 # RS, RA, NS, NA, redirect...
92 ${fw6cmd} add pass ipv6-icmp from fe80::/10 to fe80::/10
93 ${fw6cmd} add pass ipv6-icmp from fe80::/10 to ff02::/16
98 case ${ipv6_firewall_type} in
100 ${fw6cmd} add 65000 pass all from any to any
103 [Cc][Ll][Ii][Ee][Nn][Tt])
105 # This is a prototype setup that will protect your system somewhat
106 # against people from outside your own network.
109 # set these to your network and prefixlen and ip
111 # This needs more work
117 # Allow any traffic to or from my own net.
118 ${fw6cmd} add pass all from ${ip} to ${net}/${prefixlen}
119 ${fw6cmd} add pass all from ${net}/${prefixlen} to ${ip}
121 # Allow any link-local multicast traffic
122 ${fw6cmd} add pass all from fe80::/10 to ff02::/16
123 ${fw6cmd} add pass all from ${net}/${prefixlen} to ff02::/16
125 # Allow TCP through if setup succeeded
126 ${fw6cmd} add pass tcp from any to any established
128 # Allow IP fragments to pass through
129 ${fw6cmd} add pass all from any to any frag
131 # Allow setup of incoming email
132 ${fw6cmd} add pass tcp from any to ${ip} 25 setup
134 # Allow setup of outgoing TCP connections only
135 ${fw6cmd} add pass tcp from ${ip} to any setup
137 # Disallow setup of all other TCP connections
138 ${fw6cmd} add deny tcp from any to any setup
140 # Allow DNS queries out in the world
141 ${fw6cmd} add pass udp from any 53 to ${ip}
142 ${fw6cmd} add pass udp from ${ip} to any 53
144 # Allow NTP queries out in the world
145 ${fw6cmd} add pass udp from any 123 to ${ip}
146 ${fw6cmd} add pass udp from ${ip} to any 123
148 # Allow ICMPv6 destination unreach
149 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
151 # Allow NS/NA/toobig (don't filter it out)
152 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
154 # Everything else is denied by default, unless the
155 # IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
159 [Ss][Ii][Mm][Pp][Ll][Ee])
161 # This is a prototype setup for a simple firewall. Configure this
162 # machine as a named server and ntp server, and point all the machines
163 # on the inside at this machine for those services.
166 # set these to your outside interface network and prefixlen and ip
168 onet="3ffe:505:2:1::"
170 oip="3ffe:505:2:1::1"
172 # set these to your inside interface network and prefixlen and ip
174 inet="3ffe:505:2:2::"
176 iip="3ffe:505:2:2::1"
179 ${fw6cmd} add deny all from ${inet}/${iprefixlen} to any in via ${oif}
180 ${fw6cmd} add deny all from ${onet}/${oprefixlen} to any in via ${iif}
182 # Stop site-local on the outside interface
183 ${fw6cmd} add deny all from fec0::/10 to any via ${oif}
184 ${fw6cmd} add deny all from any to fec0::/10 via ${oif}
186 # Disallow "internal" addresses to appear on the wire.
187 ${fw6cmd} add deny all from ::ffff:0.0.0.0/96 to any via ${oif}
188 ${fw6cmd} add deny all from any to ::ffff:0.0.0.0/96 via ${oif}
190 # Disallow packets to malicious IPv4 compatible prefix.
191 ${fw6cmd} add deny all from ::224.0.0.0/100 to any via ${oif}
192 ${fw6cmd} add deny all from any to ::224.0.0.0/100 via ${oif}
193 ${fw6cmd} add deny all from ::127.0.0.0/104 to any via ${oif}
194 ${fw6cmd} add deny all from any to ::127.0.0.0/104 via ${oif}
195 ${fw6cmd} add deny all from ::0.0.0.0/104 to any via ${oif}
196 ${fw6cmd} add deny all from any to ::0.0.0.0/104 via ${oif}
197 ${fw6cmd} add deny all from ::255.0.0.0/104 to any via ${oif}
198 ${fw6cmd} add deny all from any to ::255.0.0.0/104 via ${oif}
200 ${fw6cmd} add deny all from ::0.0.0.0/96 to any via ${oif}
201 ${fw6cmd} add deny all from any to ::0.0.0.0/96 via ${oif}
203 # Disallow packets to malicious 6to4 prefix.
204 ${fw6cmd} add deny all from 2002:e000::/20 to any via ${oif}
205 ${fw6cmd} add deny all from any to 2002:e000::/20 via ${oif}
206 ${fw6cmd} add deny all from 2002:7f00::/24 to any via ${oif}
207 ${fw6cmd} add deny all from any to 2002:7f00::/24 via ${oif}
208 ${fw6cmd} add deny all from 2002:0000::/24 to any via ${oif}
209 ${fw6cmd} add deny all from any to 2002:0000::/24 via ${oif}
210 ${fw6cmd} add deny all from 2002:ff00::/24 to any via ${oif}
211 ${fw6cmd} add deny all from any to 2002:ff00::/24 via ${oif}
213 ${fw6cmd} add deny all from 2002:0a00::/24 to any via ${oif}
214 ${fw6cmd} add deny all from any to 2002:0a00::/24 via ${oif}
215 ${fw6cmd} add deny all from 2002:ac10::/28 to any via ${oif}
216 ${fw6cmd} add deny all from any to 2002:ac10::/28 via ${oif}
217 ${fw6cmd} add deny all from 2002:c0a8::/32 to any via ${oif}
218 ${fw6cmd} add deny all from any to 2002:c0a8::/32 via ${oif}
220 ${fw6cmd} add deny all from ff05::/16 to any via ${oif}
221 ${fw6cmd} add deny all from any to ff05::/16 via ${oif}
223 # Allow TCP through if setup succeeded
224 ${fw6cmd} add pass tcp from any to any established
226 # Allow IP fragments to pass through
227 ${fw6cmd} add pass all from any to any frag
229 # Allow setup of incoming email
230 ${fw6cmd} add pass tcp from any to ${oip} 25 setup
232 # Allow access to our DNS
233 ${fw6cmd} add pass tcp from any to ${oip} 53 setup
234 ${fw6cmd} add pass udp from any to ${oip} 53
235 ${fw6cmd} add pass udp from ${oip} 53 to any
237 # Allow access to our WWW
238 ${fw6cmd} add pass tcp from any to ${oip} 80 setup
240 # Reject&Log all setup of incoming connections from the outside
241 ${fw6cmd} add deny log tcp from any to any in via ${oif} setup
243 # Allow setup of any other TCP connection
244 ${fw6cmd} add pass tcp from any to any setup
246 # Allow DNS queries out in the world
247 ${fw6cmd} add pass udp from any 53 to ${oip}
248 ${fw6cmd} add pass udp from ${oip} to any 53
250 # Allow NTP queries out in the world
251 ${fw6cmd} add pass udp from any 123 to ${oip}
252 ${fw6cmd} add pass udp from ${oip} to any 123
255 #${fw6cmd} add pass udp from fe80::/10 521 to ff02::9 521
256 #${fw6cmd} add pass udp from fe80::/10 521 to fe80::/10 521
258 # Allow ICMPv6 destination unreach
259 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
261 # Allow NS/NA/toobig (don't filter it out)
262 ${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
264 # Everything else is denied by default, unless the
265 # IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
269 [Uu][Nn][Kk][Nn][Oo][Ww][Nn])
272 if [ -r "${ipv6_firewall_type}" ]; then
273 ${fw6cmd} ${ipv6_firewall_flags} ${ipv6_firewall_type}