jazz.m4, numbers.m4: Expose the OpenPGP key server.
[firewall] / local.m4
1 ### -*-sh-*-
2 ###
3 ### Local firewall configuration
4 ###
5 ### (c) 2008 Mark Wooding
6 ###
7
8 ###----- Licensing notice ---------------------------------------------------
9 ###
10 ### This program is free software; you can redistribute it and/or modify
11 ### it under the terms of the GNU General Public License as published by
12 ### the Free Software Foundation; either version 2 of the License, or
13 ### (at your option) any later version.
14 ###
15 ### This program is distributed in the hope that it will be useful,
16 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ### GNU General Public License for more details.
19 ###
20 ### You should have received a copy of the GNU General Public License
21 ### along with this program; if not, write to the Free Software Foundation,
22 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23
24 ###--------------------------------------------------------------------------
25 ### Local configuration.
26
27 m4_divert(6)m4_dnl
28 ## Default NTP servers.
29 defconf(ntp_servers,
30 "158.152.1.76 158.152.1.204 194.159.253.2 195.173.57.232")
31
32 m4_divert(-1)
33 ###--------------------------------------------------------------------------
34 ### Packet classification.
35
36 ## IPv4 addressing.
37 ##
38 ## There are two small blocks of publicly routable IPv4 addresses, and a
39 ## block of RFC1918 private-use addresses allocated from the Cambridge G-RIN.
40 ## The former are as follows.
41 ##
42 ## 62.49.204.144/28
43 ## House border network (dmz). We have all of these, but .145
44 ## is reserved for the router.
45 ##
46 ## 212.13.18.64/28
47 ## Jump colocated network (jump). .65--68 are used by Jump
48 ## network infrastructure; we get the rest.
49 ##
50 ## The latter is the block 172.29.196.0/22. Currently the low half is
51 ## unallocated (and may be returned to the G-RIN); the remaining addresses
52 ## are allocated as follows.
53 ##
54 ## 172.29.198.0/24 Untrusted networks.
55 ## .0/25 house wireless net
56 ## .128/28 iodine (IP-over-DNS) network
57 ##
58 ## 172.29.199.0/24 Trusted networks.
59 ## .0/25 house wired network
60 ## .128/27 mobile VPN hosts
61 ## .160/28 reserved, except .160/30 allocated for ITS
62 ## .176/28 internal colocated network
63 ## .192/27 house safe network
64 ## .224/27 anycast services
65
66 ## IPv6 addressing.
67 ##
68 ## There are five blocks of publicly routable IPv6 addresses, though some of
69 ## them aren't very interesting. The ranges are as follows.
70 ##
71 ## 2001:470:1f08:1b98::/64
72 ## Hurricane Electric tunnel network: only :1 (HE) and :2
73 ## (radius) are used.
74 ##
75 ## 2001:470:1f09:1b98::/64
76 ## House border network (dmz).
77 ##
78 ## 2001:470:9740::/48
79 ## Main house range. See below for allocation policy.
80 ##
81 ## 2001:ba8:0:1d9::/64
82 ## Jump border network (jump): :1 is the router (supplied by
83 ## Jump); other addresses are ours.
84 ##
85 ## 2001:ba8:1d9::/48
86 ## Main colocated range. See below for allocation policy.
87 ##
88 ## Addresses in the /64 networks are simply allocated in ascending order.
89 ## The /48s are split into /64s by appending a 16-bit network number. The
90 ## top nibble of the network number classifies the network, as follows.
91 ##
92 ## 8xxx Untrusted
93 ## 6xxx Virtual, safe
94 ## 4xxx Safe
95 ## 0xxx Unsafe, trusted
96 ##
97 ## These have been chosen so that network properties can be deduced by
98 ## inspecting bits of the network number:
99 ##
100 ## Bit 15 If set, the network is untrusted; otherwise it is trusted.
101 ## Bit 14 If set, the network is safe; otherwise it is unsafe.
102 ##
103 ## Finally, the low-order nibbles identify the site.
104 ##
105 ## 0 No specific site: mobile VPN endpoints or anycast addresses.
106 ## 1 House.
107 ## 2 Jump colocation.
108 ##
109 ## Usually site-0 networks are allocated from the Jump range to improve
110 ## expected performance from/to external sites which don't engage in our
111 ## dynamic routing protocols.
112
113 ## Define the available network classes.
114 m4_divert(42)m4_dnl
115 defnetclass untrusted untrusted trusted mcast
116 defnetclass trusted untrusted trusted safe noloop mcast
117 defnetclass safe trusted safe noloop mcast
118 defnetclass noloop trusted safe mcast
119
120 defnetclass link
121 defnetclass mcast
122 m4_divert(-1)
123
124 m4_divert(26)m4_dnl
125 ###--------------------------------------------------------------------------
126 ### Network layout.
127
128 ## House networks.
129 defnet dmz trusted
130 addr 62.49.204.144/28 2001:470:1f09:1b98::/64
131 via unsafe untrusted
132 defnet unsafe trusted
133 addr 172.29.199.0/25 2001:470:9740:1::/64
134 via househub
135 defnet safe safe
136 addr 172.29.199.192/27 2001:470:9740:4001::/64
137 via househub
138 defnet untrusted untrusted
139 addr 172.29.198.0/25 2001:470:9740:8001::/64
140 via househub
141
142 defnet househub virtual
143 via housebdry dmz unsafe safe untrusted
144 defnet housebdry virtual
145 via househub hub
146
147 ## House hosts.
148 defhost radius
149 hosttype router
150 iface eth0 dmz unsafe safe untrusted vpn sgo colobdry default
151 iface eth1 dmz unsafe safe untrusted vpn sgo colobdry default
152 iface eth2 dmz unsafe safe untrusted vpn sgo colobdry
153 iface eth3 unsafe untrusted vpn default
154 iface ppp0 default
155 iface t6-he default
156 iface vpn-precision colobdry vpn sgo
157 iface vpn-chiark sgo
158 iface vpn-+ vpn
159 defhost roadstar
160 iface eth0 dmz unsafe
161 iface eth1 dmz unsafe
162 defhost jem
163 iface eth0 dmz unsafe
164 iface eth1 dmz unsafe
165 defhost artist
166 hosttype router
167 iface eth0 dmz unsafe untrusted
168 iface eth1 dmz unsafe untrusted
169 iface eth3 unsafe untrusted
170 defhost vampire
171 hosttype router
172 iface eth0.4 dmz unsafe untrusted safe vpn sgo colobdry
173 iface eth0.5 dmz unsafe untrusted safe vpn sgo colobdry
174 iface eth0.6 dmz unsafe safe untrusted vpn sgo colobdry
175 iface eth0.7 unsafe untrusted vpn
176 iface vpn-precision colobdry vpn sgo
177 iface vpn-chiark sgo
178 iface vpn-+ vpn
179 defhost ibanez
180 iface br-dmz dmz unsafe
181 iface br-unsafe unsafe
182 defhost orange
183 iface wlan0 untrusted
184 iface vpn-radius unsafe
185 defhost groove
186 iface eth0 unsafe
187 iface wlan0 untrusted
188 iface vpn-radius unsafe
189
190 defhost gibson
191 hosttype client
192 iface eth0 unsafe
193
194 ## Colocated networks.
195 defnet jump trusted
196 addr 212.13.198.64/28 2001:ba8:0:1d9::/64
197 via colohub
198 defnet colo trusted
199 addr 172.29.199.176/28 2001:ba8:1d9:2::/64
200 via colohub
201 defnet colohub virtual
202 via colobdry jump colo
203 defnet colobdry virtual
204 via colohub hub
205 defnet iodine untrusted
206 addr 172.29.198.128/28
207 via colohub
208
209 ## Colocated hosts.
210 defhost fender
211 iface br-jump jump colo
212 iface br-colo jump colo
213 defhost precision
214 hosttype router
215 iface eth0 jump colo vpn sgo
216 iface eth1 jump colo vpn sgo
217 iface vpn-mango binswood
218 iface vpn-radius housebdry vpn sgo
219 iface vpn-chiark sgo
220 iface vpn-+ vpn
221 defhost telecaster
222 iface eth0 jump colo
223 iface eth1 jump colo
224 defhost stratocaster
225 iface eth0 jump colo
226 iface eth1 jump colo
227 defhost jaguar
228 iface eth0 jump
229 defhost jazz
230 hosttype router
231 iface eth0 jump colo vpn
232 iface eth1 jump colo vpn
233 iface dns0 iodine
234 iface vpn-+ vpn
235
236 ## Other networks.
237 defnet hub virtual
238 via housebdry colobdry
239 defnet sgo noloop
240 addr !172.29.198.0/23
241 addr 10.0.0.0/8
242 addr 172.16.0.0/12
243 addr 192.168.0.0/16
244 via househub colohub
245 defnet vpn safe
246 addr 172.29.199.128/27 2001:ba8:1d9:6000::/64
247 via househub colohub
248 host crybaby 1 ::1:1
249 host terror 2 ::2:1
250 host orange 3 ::3:1
251 host haze 4 ::4:1
252 host groove 5 ::5:1
253 defnet anycast trusted
254 addr 172.29.199.224/27 2001:ba8:1d9:0::/64
255 via dmz unsafe safe untrusted jump colo vpn
256 defnet default untrusted
257 addr 62.49.204.144/28 2001:470:1f09:1b98::/64
258 addr 212.13.198.64/28 2001:ba8:0:1d9::/64
259 addr 2001:ba8:1d9::/48 #temporary
260 via dmz unsafe untrusted jump colo
261
262 ## Satellite networks.
263 defnet binswood noloop
264 addr 10.165.27.0/24
265 via colohub
266
267 defhost mango
268 hosttype router
269 iface eth0 binswood default
270 iface vpn-precision colo
271
272 m4_divert(80)m4_dnl
273 ###--------------------------------------------------------------------------
274 ### Connection tracking helper modules.
275
276 for i in ftp; do
277 modprobe nf_conntrack_$i
278 done
279
280 m4_divert(80)m4_dnl
281 ###--------------------------------------------------------------------------
282 ### Special forwarding exemptions.
283
284 case $forward in
285 1)
286
287 ## Only allow these packets if they're not fragmented. (Don't trust safe
288 ## hosts's fragment reassembly to be robust against malicious fragments.)
289 ## There's a hideous bug in iptables 1.4.11.1 which botches the meaning
290 ## of `! -f', so we do the negation using early return from a subchain.
291 clearchain fwd-spec-nofrag
292 run iptables -A fwd-spec-nofrag -j RETURN --fragment
293 run ip6tables -A fwd-spec-nofrag -j RETURN \
294 -m ipv6header --soft --header frag
295 run ip46tables -A FORWARD -j fwd-spec-nofrag
296
297 ## Allow ping from safe/noloop to untrusted networks.
298 run iptables -A fwd-spec-nofrag -j ACCEPT \
299 -p icmp --icmp-type echo-request \
300 -m mark --mark $to_untrusted/$MASK_TO
301 run iptables -A fwd-spec-nofrag -j ACCEPT \
302 -p icmp --icmp-type echo-reply \
303 -m mark --mark $from_untrusted/$MASK_FROM \
304 -m state --state ESTABLISHED
305 run ip6tables -A fwd-spec-nofrag -j ACCEPT \
306 -p icmpv6 --icmpv6-type echo-request \
307 -m mark --mark $to_untrusted/$MASK_TO
308 run ip6tables -A fwd-spec-nofrag -j ACCEPT \
309 -p icmpv6 --icmpv6-type echo-reply \
310 -m mark --mark $from_untrusted/$MASK_FROM \
311 -m state --state ESTABLISHED
312
313 ## Allow SSH from safe/noloop to untrusted networks.
314 run ip46tables -A fwd-spec-nofrag -j ACCEPT \
315 -p tcp --destination-port $port_ssh \
316 -m mark --mark $to_untrusted/$MASK_TO
317 run ip46tables -A fwd-spec-nofrag -j ACCEPT \
318 -p tcp --source-port $port_ssh \
319 -m mark --mark $from_untrusted/$MASK_FROM \
320 -m state --state ESTABLISHED
321
322 ;;
323 esac
324
325 m4_divert(80)m4_dnl
326 ###--------------------------------------------------------------------------
327 ### Kill things we don't understand properly.
328 ###
329 ### I don't like having to do this, but since I don't know how to do proper
330 ### multicast filtering, I'm just going to ban it from being forwarded.
331
332 errorchain poorly-understood REJECT
333
334 ## Ban multicast destination addresses in forwarding.
335 case $forward in
336 1)
337 run iptables -A FORWARD -g poorly-understood \
338 -d 224.0.0.0/4
339 run ip6tables -A FORWARD -g poorly-understood \
340 -d ff::/8
341 ;;
342 esac
343
344 m4_divert(84)m4_dnl
345 ###--------------------------------------------------------------------------
346 ### Locally-bound packet inspection.
347
348 clearchain inbound
349
350 ## Track connections.
351 commonrules inbound
352 conntrack inbound
353
354 ## Allow incoming bootp. Bootp won't be forwarded, so this is obviously a
355 ## local request.
356 run iptables -A inbound -j ACCEPT \
357 -s 0.0.0.0 -d 255.255.255.255 \
358 -p udp --source-port $port_bootpc --destination-port $port_bootps
359 run iptables -A inbound -j ACCEPT \
360 -s 172.29.198.0/23 \
361 -p udp --source-port $port_bootpc --destination-port $port_bootps
362
363 ## Allow incoming ping. This is the only ICMP left.
364 run ip46tables -A inbound -j ACCEPT -p icmp
365
366 m4_divert(88)m4_dnl
367 ## Allow unusual things.
368 openports inbound
369
370 ## Inspect inbound packets from untrusted sources.
371 run ip46tables -A inbound -j forbidden
372 run ip46tables -A INPUT -m mark --mark $from_untrusted/$MASK_FROM -g inbound
373
374 ## Otherwise process as indicated by the mark.
375 for i in $inchains; do
376 run ip46tables -A $i -m mark ! --mark 0/$MASK_MASK -j ACCEPT
377 done
378
379 m4_divert(-1)
380 ###----- That's all, folks --------------------------------------------------