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3a1019f6 | 1 | #!/bin/sh |
66c36198 PM |
2 | ############################################################################### |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
5 | # Copyright (C) 2007-2022 IPFire Team <info@ipfire.org> # | |
6 | # # | |
7 | # This program is free software: you can redistribute it and/or modify # | |
8 | # it under the terms of the GNU General Public License as published by # | |
9 | # the Free Software Foundation, either version 3 of the License, or # | |
10 | # (at your option) any later version. # | |
11 | # # | |
12 | # This program is distributed in the hope that it will be useful, # | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
15 | # GNU General Public License for more details. # | |
16 | # # | |
17 | # You should have received a copy of the GNU General Public License # | |
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
19 | # # | |
20 | ############################################################################### | |
3a1019f6 | 21 | |
0f5c5ce7 MT |
22 | . /etc/sysconfig/rc |
23 | . ${rc_functions} | |
24 | ||
3a1019f6 MT |
25 | eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings) |
26 | eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings) | |
fe0cd647 | 27 | eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings) |
3a1019f6 | 28 | IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'` |
5462658e | 29 | if [ -z $IFACE ]; then |
5b0eca95 AF |
30 | IFACE="red0" |
31 | fi | |
3a1019f6 MT |
32 | |
33 | if [ -f /var/ipfire/red/device ]; then | |
34 | DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'` | |
35 | fi | |
36 | ||
ce31144c MT |
37 | NAT_MASK="0x0f000000" |
38 | ||
3fa8300e MT |
39 | IPS_REPEAT_MARK="0x80000000" |
40 | IPS_REPEAT_MASK="0x80000000" | |
41 | IPS_BYPASS_MARK="0x40000000" | |
42 | IPS_BYPASS_MASK="0x40000000" | |
43 | ||
83085ae9 SS |
44 | IPSET_DB_DIR="/var/lib/location/ipset" |
45 | ||
c581b670 MT |
46 | function iptables() { |
47 | /sbin/iptables --wait "$@" | |
48 | } | |
49 | ||
3a1019f6 MT |
50 | iptables_init() { |
51 | # Flush all rules and delete all custom chains | |
c581b670 MT |
52 | iptables -F |
53 | iptables -t nat -F | |
54 | iptables -t mangle -F | |
b1109b8a | 55 | iptables -t raw -F |
c581b670 MT |
56 | iptables -X |
57 | iptables -t nat -X | |
58 | iptables -t mangle -X | |
b1109b8a | 59 | iptables -t raw -X |
3a1019f6 MT |
60 | |
61 | # Set up policies | |
c581b670 MT |
62 | iptables -P INPUT DROP |
63 | iptables -P FORWARD DROP | |
64 | iptables -P OUTPUT ACCEPT | |
3a1019f6 | 65 | |
78b65ea7 MT |
66 | # Enable TRACE logging to syslog |
67 | modprobe nf_log_ipv4 | |
68 | sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4 | |
69 | ||
3fa8300e MT |
70 | # IPS Bypass Chain which stores the BYPASS bit in connection tracking |
71 | iptables -N IPSBYPASS | |
19357bc5 | 72 | iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))" |
3fa8300e MT |
73 | |
74 | # Jump into bypass chain when the BYPASS bit is set | |
75 | for chain in INPUT FORWARD OUTPUT; do | |
76 | iptables -A "${chain}" -m mark \ | |
77 | --mark "$(( IPS_REPEAT_MARK | IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j IPSBYPASS | |
78 | done | |
79 | ||
3a1019f6 | 80 | # Empty LOG_DROP and LOG_REJECT chains |
c581b670 | 81 | iptables -N LOG_DROP |
8ee3a135 | 82 | iptables -A LOG_DROP -m limit --limit 10/second -j LOG |
c581b670 MT |
83 | iptables -A LOG_DROP -j DROP |
84 | iptables -N LOG_REJECT | |
8ee3a135 | 85 | iptables -A LOG_REJECT -m limit --limit 10/second -j LOG |
c581b670 | 86 | iptables -A LOG_REJECT -j REJECT |
3a1019f6 MT |
87 | |
88 | # This chain will log, then DROPs packets with certain bad combinations | |
ef7e9e52 | 89 | # of flags might indicate a port-scan attempt (xmas, null, etc.) |
c581b670 | 90 | iptables -N PSCAN |
5595bc03 | 91 | if [ "$DROPPORTSCAN" == "on" ]; then |
ef7e9e52 PM |
92 | iptables -A PSCAN -p tcp -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan" |
93 | iptables -A PSCAN -p udp -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan" | |
8ee3a135 PM |
94 | iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan" |
95 | iptables -A PSCAN -f -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan" | |
5595bc03 | 96 | fi |
c581b670 | 97 | iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan" |
3a1019f6 MT |
98 | |
99 | # New tcp packets without SYN set - could well be an obscure type of port scan | |
ef7e9e52 | 100 | # that's not covered above, may just be a broken Windows machine |
c581b670 | 101 | iptables -N NEWNOTSYN |
5595bc03 | 102 | if [ "$DROPNEWNOTSYN" == "on" ]; then |
8ee3a135 | 103 | iptables -A NEWNOTSYN -m limit --limit 10/second -j LOG --log-prefix "DROP_NEWNOTSYN " |
5595bc03 | 104 | fi |
c581b670 | 105 | iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN" |
3a1019f6 | 106 | |
a36cd34e PM |
107 | # Log and subsequently drop spoofed packets or "martians", arriving from sources |
108 | # on interfaces where we don't expect them | |
109 | iptables -N SPOOFED_MARTIAN | |
110 | if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then | |
111 | iptables -A SPOOFED_MARTIAN -m limit --limit 10/second -j LOG --log-prefix "DROP_SPOOFED_MARTIAN " | |
112 | fi | |
113 | iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN" | |
114 | ||
3a1019f6 | 115 | # Chain to contain all the rules relating to bad TCP flags |
c581b670 | 116 | iptables -N BADTCP |
3a1019f6 | 117 | |
c581b670 MT |
118 | # Don't check loopback |
119 | iptables -A BADTCP -i lo -j RETURN | |
d8158ca6 | 120 | |
3a1019f6 | 121 | # Disallow packets frequently used by port-scanners |
dccbf1bf AF |
122 | # NMAP FIN/URG/PSH (XMAS scan) |
123 | iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN | |
124 | # SYN/RST/ACK/FIN/URG | |
125 | iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN | |
126 | # ALL/ALL | |
127 | iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN | |
128 | # FIN Stealth | |
c581b670 | 129 | iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN |
3a1019f6 | 130 | # SYN/RST (also catches xmas variants that set SYN+RST+...) |
c581b670 | 131 | iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN |
3a1019f6 | 132 | # SYN/FIN (QueSO or nmap OS probe) |
c581b670 | 133 | iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN |
dccbf1bf AF |
134 | # Null |
135 | iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN | |
3a1019f6 | 136 | # NEW TCP without SYN |
c581b670 | 137 | iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN |
b85d2a98 | 138 | |
c581b670 MT |
139 | iptables -A INPUT -p tcp -j BADTCP |
140 | iptables -A FORWARD -p tcp -j BADTCP | |
c0359d6d | 141 | |
b1109b8a | 142 | # Connection tracking chains |
5ca74566 | 143 | iptables -N CTINVALID |
8269c831 PM |
144 | if [ "$LOGDROPCTINVALID" == "on" ]; then |
145 | iptables -A CTINVALID -m limit --limit 10/second -j LOG --log-prefix "DROP_CTINVALID " | |
146 | fi | |
5ca74566 PM |
147 | iptables -A CTINVALID -j DROP -m comment --comment "DROP_CTINVALID" |
148 | ||
c581b670 | 149 | iptables -N CONNTRACK |
b1109b8a | 150 | iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT |
5ca74566 | 151 | iptables -A CONNTRACK -m conntrack --ctstate INVALID -j CTINVALID |
0f535060 | 152 | iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT |
b1109b8a | 153 | |
c825fcef MT |
154 | # Restore any connection marks |
155 | iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark | |
156 | ||
ef7e9e52 | 157 | # Fix for braindead ISPs |
c581b670 | 158 | iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu |
3a1019f6 MT |
159 | |
160 | # CUSTOM chains, can be used by the users themselves | |
c581b670 MT |
161 | iptables -N CUSTOMINPUT |
162 | iptables -A INPUT -j CUSTOMINPUT | |
163 | iptables -N CUSTOMFORWARD | |
164 | iptables -A FORWARD -j CUSTOMFORWARD | |
165 | iptables -N CUSTOMOUTPUT | |
166 | iptables -A OUTPUT -j CUSTOMOUTPUT | |
167 | iptables -t nat -N CUSTOMPREROUTING | |
168 | iptables -t nat -A PREROUTING -j CUSTOMPREROUTING | |
169 | iptables -t nat -N CUSTOMPOSTROUTING | |
170 | iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING | |
3a1019f6 | 171 | |
ef7e9e52 | 172 | # IPS (Guardian) chains |
c581b670 MT |
173 | iptables -N GUARDIAN |
174 | iptables -A INPUT -j GUARDIAN | |
175 | iptables -A FORWARD -j GUARDIAN | |
815eaff4 | 176 | |
80fbd899 MT |
177 | # Block non-established IPsec networks |
178 | iptables -N IPSECBLOCK | |
179 | iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK | |
180 | iptables -A OUTPUT -m policy --dir out --pol none -j IPSECBLOCK | |
181 | ||
1e555330 | 182 | # Block OpenVPN transfer networks |
c581b670 | 183 | iptables -N OVPNBLOCK |
a0a5c14f | 184 | iptables -A INPUT -i tun+ -j OVPNBLOCK |
a0a5c14f MT |
185 | iptables -A FORWARD -i tun+ -j OVPNBLOCK |
186 | iptables -A FORWARD -o tun+ -j OVPNBLOCK | |
1e555330 | 187 | |
ef7e9e52 | 188 | # IPS (Suricata) chains |
5dba8382 PM |
189 | iptables -N IPS_INPUT |
190 | iptables -N IPS_FORWARD | |
191 | iptables -N IPS_OUTPUT | |
3fa8300e MT |
192 | |
193 | for chain in INPUT FORWARD OUTPUT; do | |
194 | iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j "IPS_${chain}" | |
195 | done | |
5dba8382 | 196 | |
51ab1de1 | 197 | # OpenVPN transfer network translation |
c581b670 MT |
198 | iptables -t nat -N OVPNNAT |
199 | iptables -t nat -A POSTROUTING -j OVPNNAT | |
51ab1de1 | 200 | |
daa1ceba | 201 | # IPTV chains for IGMPPROXY |
c581b670 MT |
202 | iptables -N IPTVINPUT |
203 | iptables -A INPUT -j IPTVINPUT | |
204 | iptables -N IPTVFORWARD | |
205 | iptables -A FORWARD -j IPTVFORWARD | |
daa1ceba | 206 | |
8e59a602 MT |
207 | # Allow to ping the firewall. |
208 | iptables -N ICMPINPUT | |
209 | iptables -A INPUT -j ICMPINPUT | |
210 | iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT | |
3a1019f6 | 211 | |
2b44044b | 212 | # Accept everything on loopback |
c581b670 | 213 | iptables -N LOOPBACK |
2b44044b AF |
214 | iptables -A LOOPBACK -i lo -j ACCEPT |
215 | iptables -A LOOPBACK -o lo -j ACCEPT | |
afc611d4 | 216 | |
a36cd34e PM |
217 | # Filter all packets with loopback addresses on non-loopback interfaces (spoofed) |
218 | iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN | |
219 | iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN | |
3b9a23ce MT |
220 | |
221 | for i in INPUT FORWARD OUTPUT; do | |
c581b670 | 222 | iptables -A ${i} -j LOOPBACK |
3b9a23ce | 223 | done |
afc611d4 | 224 | |
bbaa3613 AM |
225 | # Captive portal |
226 | iptables -N CAPTIVE_PORTAL | |
227 | iptables -N CAPTIVE_PORTAL_CLIENTS | |
228 | for i in INPUT FORWARD; do | |
229 | iptables -A ${i} -j CAPTIVE_PORTAL | |
230 | done | |
231 | ||
3a1019f6 | 232 | # Accept everything connected |
b85d2a98 | 233 | for i in INPUT FORWARD OUTPUT; do |
c581b670 | 234 | iptables -A ${i} -j CONNTRACK |
b85d2a98 MT |
235 | done |
236 | ||
8490e496 MT |
237 | # Allow DHCP |
238 | iptables -N DHCPINPUT | |
239 | iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT | |
240 | iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT | |
241 | ||
242 | iptables -N DHCPOUTPUT | |
243 | iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT | |
244 | iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT | |
245 | ||
246 | # Allow DHCP on GREEN | |
247 | iptables -N DHCPGREENINPUT | |
248 | iptables -N DHCPGREENOUTPUT | |
249 | if [ -n "${GREEN_DEV}" ]; then | |
250 | iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT | |
251 | iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT | |
252 | fi | |
253 | ||
ef7e9e52 | 254 | # Allow DHCP on BLUE to be turned on/off |
8490e496 MT |
255 | iptables -N DHCPBLUEINPUT |
256 | iptables -N DHCPBLUEOUTPUT | |
257 | if [ -n "${BLUE_DEV}" ]; then | |
258 | iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT | |
259 | iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT | |
260 | fi | |
261 | ||
7b529f54 SS |
262 | # Chains for networks known as being hostile, posing a technical threat to our users |
263 | # (i. e. listed at Spamhaus DROP et al.) | |
264 | iptables -N HOSTILE | |
e77d960b MT |
265 | iptables -A INPUT -j HOSTILE |
266 | iptables -A FORWARD -j HOSTILE | |
267 | iptables -A OUTPUT -j HOSTILE | |
268 | ||
269 | iptables -N HOSTILE_DROP | |
270 | iptables -A HOSTILE_DROP -m limit --limit 10/second -j LOG --log-prefix "DROP_HOSTILE " | |
271 | iptables -A HOSTILE_DROP -j DROP -m comment --comment "DROP_HOSTILE" | |
7b529f54 | 272 | |
4d25c1f3 PM |
273 | # Tor (inbound) |
274 | iptables -N TOR_INPUT | |
275 | iptables -A INPUT -j TOR_INPUT | |
276 | ||
0e6eca78 MT |
277 | # Location Block |
278 | iptables -N LOCATIONBLOCK | |
279 | iptables -A INPUT -j LOCATIONBLOCK | |
280 | iptables -A FORWARD -j LOCATIONBLOCK | |
cab02e2a | 281 | |
5fd30232 | 282 | # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything |
c581b670 MT |
283 | iptables -N IPSECINPUT |
284 | iptables -N IPSECFORWARD | |
285 | iptables -N IPSECOUTPUT | |
286 | iptables -A INPUT -j IPSECINPUT | |
287 | iptables -A FORWARD -j IPSECFORWARD | |
288 | iptables -A OUTPUT -j IPSECOUTPUT | |
289 | iptables -t nat -N IPSECNAT | |
290 | iptables -t nat -A POSTROUTING -j IPSECNAT | |
b68e5c14 | 291 | |
3a1019f6 | 292 | # localhost and ethernet. |
c0e0848f MT |
293 | # Always allow accessing the web GUI from GREEN. |
294 | iptables -N GUIINPUT | |
295 | iptables -A INPUT -j GUIINPUT | |
48a7737f MT |
296 | if [ -n "${GREEN_DEV}" ]; then |
297 | iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT | |
298 | fi | |
8490e496 | 299 | |
81393987 | 300 | # WIRELESS chains |
c581b670 MT |
301 | iptables -N WIRELESSINPUT |
302 | iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT | |
303 | iptables -N WIRELESSFORWARD | |
304 | iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD | |
987b75bc | 305 | |
ab4876ad | 306 | # OpenVPN |
c581b670 MT |
307 | iptables -N OVPNINPUT |
308 | iptables -A INPUT -j OVPNINPUT | |
ab4876ad | 309 | |
4d25c1f3 | 310 | # Tor (outbound) |
5fc5f703 PM |
311 | iptables -N TOR_OUTPUT |
312 | iptables -A OUTPUT -j TOR_OUTPUT | |
0e7bfb13 | 313 | |
d5f1422d | 314 | # Jump into the actual firewall ruleset. |
c581b670 MT |
315 | iptables -N INPUTFW |
316 | iptables -A INPUT -j INPUTFW | |
d5f1422d | 317 | |
c581b670 MT |
318 | iptables -N OUTGOINGFW |
319 | iptables -A OUTPUT -j OUTGOINGFW | |
d5f1422d | 320 | |
c581b670 MT |
321 | iptables -N FORWARDFW |
322 | iptables -A FORWARD -j FORWARDFW | |
d5f1422d | 323 | |
fac38614 | 324 | # SNAT rules |
c581b670 MT |
325 | iptables -t nat -N NAT_SOURCE |
326 | iptables -t nat -A POSTROUTING -j NAT_SOURCE | |
fac38614 | 327 | |
9bb40553 MT |
328 | # Captive Portal |
329 | iptables -t nat -N CAPTIVE_PORTAL | |
330 | iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL | |
331 | ||
bb12dd7b | 332 | # Custom prerouting chains (for transparent proxy) |
c581b670 MT |
333 | iptables -t nat -N SQUID |
334 | iptables -t nat -A PREROUTING -j SQUID | |
bb12dd7b MT |
335 | |
336 | # DNAT rules | |
c581b670 MT |
337 | iptables -t nat -N NAT_DESTINATION |
338 | iptables -t nat -A PREROUTING -j NAT_DESTINATION | |
99f11a16 | 339 | iptables -t nat -A OUTPUT -j NAT_DESTINATION |
bb12dd7b | 340 | |
6e87f0aa MT |
341 | iptables -t mangle -N NAT_DESTINATION |
342 | iptables -t mangle -A PREROUTING -j NAT_DESTINATION | |
343 | ||
344 | iptables -t nat -N NAT_DESTINATION_FIX | |
345 | iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX | |
346 | ||
48a7737f MT |
347 | if [ -n "${GREEN_ADDRESS}" ]; then |
348 | iptables -t nat -A NAT_DESTINATION_FIX \ | |
ce31144c | 349 | -m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}" |
48a7737f | 350 | fi |
6e87f0aa MT |
351 | |
352 | if [ -n "${BLUE_ADDRESS}" ]; then | |
353 | iptables -t nat -A NAT_DESTINATION_FIX \ | |
ce31144c | 354 | -m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}" |
6e87f0aa MT |
355 | fi |
356 | ||
357 | if [ -n "${ORANGE_ADDRESS}" ]; then | |
358 | iptables -t nat -A NAT_DESTINATION_FIX \ | |
ce31144c | 359 | -m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}" |
6e87f0aa MT |
360 | fi |
361 | ||
6e87f0aa MT |
362 | # RED chain, used for the red interface |
363 | iptables -N REDINPUT | |
364 | iptables -A INPUT -j REDINPUT | |
365 | iptables -N REDFORWARD | |
366 | iptables -A FORWARD -j REDFORWARD | |
367 | iptables -t nat -N REDNAT | |
368 | iptables -t nat -A POSTROUTING -j REDNAT | |
369 | ||
6c920b19 MT |
370 | # Populate IPsec chains |
371 | /usr/lib/firewall/ipsec-policy | |
80fbd899 | 372 | |
ab4876ad MT |
373 | # Apply OpenVPN firewall rules |
374 | /usr/local/bin/openvpnctrl --firewall-rules | |
ff4770c7 AM |
375 | |
376 | # run wirelessctrl | |
377 | /usr/local/bin/wirelessctrl | |
378 | ||
1722701a AM |
379 | # run captivectrl |
380 | /usr/local/bin/captivectrl | |
381 | ||
c581b670 MT |
382 | # POLICY CHAIN |
383 | iptables -N POLICYIN | |
384 | iptables -A INPUT -j POLICYIN | |
385 | iptables -N POLICYFWD | |
386 | iptables -A FORWARD -j POLICYFWD | |
387 | iptables -N POLICYOUT | |
388 | iptables -A OUTPUT -j POLICYOUT | |
b324de14 | 389 | |
bb383423 | 390 | # Initialize firewall policies. |
5d7faa45 | 391 | /usr/sbin/firewall-policy |
690b0bd7 | 392 | |
bb383423 | 393 | # Install firewall rules for the red interface. |
4b12aa41 TE |
394 | iptables_red_up |
395 | ||
396 | # If red has not been brought up yet, we will | |
397 | # add the blocking rules for MASQUERADE | |
398 | if [ ! -e "/var/ipfire/red/active" ]; then | |
399 | iptables_red_down | |
400 | fi | |
ff4770c7 | 401 | } |
3a1019f6 | 402 | |
4b12aa41 | 403 | iptables_red_up() { |
c581b670 MT |
404 | iptables -F REDINPUT |
405 | iptables -F REDFORWARD | |
406 | iptables -t nat -F REDNAT | |
3a1019f6 | 407 | |
e83ae0d4 PM |
408 | # Prohibit spoofing our own IP address on RED |
409 | if [ -f /var/ipfire/red/active ]; then | |
410 | REDIP="$( cat /var/ipfire/red/local-ipaddress )"; | |
411 | ||
412 | if [ "$IFACE" != "" ]; then | |
413 | iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN | |
414 | elif [ "$DEVICE" != "" ]; then | |
415 | iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN | |
416 | fi | |
417 | fi | |
418 | ||
ff4770c7 AM |
419 | # PPPoE / PPTP Device |
420 | if [ "$IFACE" != "" ]; then | |
421 | # PPPoE / PPTP | |
422 | if [ "$DEVICE" != "" ]; then | |
c581b670 | 423 | iptables -A REDINPUT -i $DEVICE -j ACCEPT |
ff4770c7 AM |
424 | fi |
425 | if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then | |
426 | if [ "$RED_DEV" != "" ]; then | |
c581b670 | 427 | iptables -A REDINPUT -i $RED_DEV -j ACCEPT |
ff4770c7 AM |
428 | fi |
429 | fi | |
3a1019f6 | 430 | fi |
ff4770c7 AM |
431 | |
432 | # PPTP over DHCP | |
433 | if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then | |
c581b670 MT |
434 | iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT |
435 | iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT | |
3a1019f6 MT |
436 | fi |
437 | ||
ff4770c7 AM |
438 | if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then |
439 | # DHCP | |
440 | if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then | |
c581b670 MT |
441 | iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT |
442 | iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
ff4770c7 AM |
443 | fi |
444 | if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then | |
c581b670 MT |
445 | iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT |
446 | iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
ff4770c7 AM |
447 | fi |
448 | ||
51c4b73f | 449 | # Outgoing masquerading (don't masqerade IPsec) |
e850a614 | 450 | iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN |
c926c637 | 451 | |
60fcb241 AF |
452 | if [ "${IFACE}" = "${GREEN_DEV}" ]; then |
453 | iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN | |
c926c637 | 454 | fi |
c400fe4c | 455 | |
983d471f | 456 | local NO_MASQ_NETWORKS |
83ef9c40 MT |
457 | |
458 | if [ "${MASQUERADE_GREEN}" = "off" ]; then | |
983d471f | 459 | NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}" |
83ef9c40 MT |
460 | fi |
461 | ||
462 | if [ "${MASQUERADE_BLUE}" = "off" ]; then | |
983d471f | 463 | NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}" |
83ef9c40 MT |
464 | fi |
465 | ||
466 | if [ "${MASQUERADE_ORANGE}" = "off" ]; then | |
983d471f | 467 | NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}" |
83ef9c40 MT |
468 | fi |
469 | ||
983d471f MT |
470 | local network |
471 | for network in ${NO_MASQ_NETWORKS}; do | |
472 | iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN | |
83ef9c40 MT |
473 | done |
474 | ||
475 | # Masquerade everything else | |
476 | iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE | |
6be0579b | 477 | fi |
66f6b279 MT |
478 | |
479 | # Reload all rules. | |
55a5bcae | 480 | /usr/local/bin/firewallctrl |
ff4770c7 AM |
481 | } |
482 | ||
4b12aa41 TE |
483 | iptables_red_down() { |
484 | # Prohibit packets to reach the masquerading rule | |
e01e07ec | 485 | # while the WAN interface is down - this is required to |
4b12aa41 TE |
486 | # circumvent udp related NAT issues |
487 | # http://forum.ipfire.org/index.php?topic=11127.0 | |
e7204c2d MT |
488 | if [ -n "${IFACE}" ]; then |
489 | iptables -F REDFORWARD | |
490 | iptables -A REDFORWARD -o "${IFACE}" -j DROP | |
491 | fi | |
4b12aa41 TE |
492 | |
493 | # Reload all rules. | |
494 | /usr/local/bin/firewallctrl | |
495 | } | |
496 | ||
ff4770c7 AM |
497 | # See how we were called. |
498 | case "$1" in | |
499 | start) | |
7d7740a4 | 500 | boot_mesg "Setting up firewall" |
ff4770c7 | 501 | iptables_init |
7d7740a4 | 502 | evaluate_retval |
6be0579b | 503 | ;; |
4b12aa41 | 504 | reload|up) |
7d7740a4 | 505 | boot_mesg "Reloading firewall" |
4b12aa41 | 506 | iptables_red_up |
7d7740a4 | 507 | evaluate_retval |
3a1019f6 | 508 | ;; |
4b12aa41 TE |
509 | down) |
510 | boot_mesg "Disabling firewall access to RED" | |
511 | iptables_red_down | |
512 | evaluate_retval | |
513 | ;; | |
3a1019f6 | 514 | restart) |
3a1019f6 MT |
515 | $0 start |
516 | ;; | |
517 | *) | |
ff4770c7 | 518 | echo "Usage: $0 {start|reload|restart}" |
3a1019f6 MT |
519 | exit 1 |
520 | ;; | |
521 | esac | |
522 | ||
523 | exit 0 |