Forward Firewall: cleanup unused code
[people/teissler/ipfire-2.x.git] / src / initscripts / init.d / firewall
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1#!/bin/sh
2
3eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
4eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
fe0cd647 5eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
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6IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'`
7
8if [ -f /var/ipfire/red/device ]; then
9 DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
10fi
11
12iptables_init() {
13 # Flush all rules and delete all custom chains
14 /sbin/iptables -F
15 /sbin/iptables -t nat -F
16 /sbin/iptables -t mangle -F
17 /sbin/iptables -X
18 /sbin/iptables -t nat -X
19 /sbin/iptables -t mangle -X
20
21 # Set up policies
22 /sbin/iptables -P INPUT DROP
23 /sbin/iptables -P FORWARD DROP
24 /sbin/iptables -P OUTPUT ACCEPT
25
26 # Empty LOG_DROP and LOG_REJECT chains
27 /sbin/iptables -N LOG_DROP
28 /sbin/iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
29 /sbin/iptables -A LOG_DROP -j DROP
30 /sbin/iptables -N LOG_REJECT
31 /sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
32 /sbin/iptables -A LOG_REJECT -j REJECT
33
34 # This chain will log, then DROPs packets with certain bad combinations
35 # of flags might indicate a port-scan attempt (xmas, null, etc)
36 /sbin/iptables -N PSCAN
5595bc03 37 if [ "$DROPPORTSCAN" == "on" ]; then
97fe1741 38 /sbin/iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
fe0cd647 39 /sbin/iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
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40 /sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
41 /sbin/iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03 42 fi
97fe1741 43 /sbin/iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
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44
45 # New tcp packets without SYN set - could well be an obscure type of port scan
46 # that's not covered above, may just be a broken windows machine
47 /sbin/iptables -N NEWNOTSYN
5595bc03 48 if [ "$DROPNEWNOTSYN" == "on" ]; then
97fe1741 49 /sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03 50 fi
97fe1741 51 /sbin/iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
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52
53 # Chain to contain all the rules relating to bad TCP flags
54 /sbin/iptables -N BADTCP
55
d8158ca6 56 #Don't check loopback
a56df4ee 57 /sbin/iptables -A BADTCP -i lo -j RETURN
d8158ca6 58
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59 # Disallow packets frequently used by port-scanners
60 # nmap xmas
61 /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
62 # Null
63 /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
64 # FIN
65 /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
66 # SYN/RST (also catches xmas variants that set SYN+RST+...)
67 /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
68 # SYN/FIN (QueSO or nmap OS probe)
69 /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
70 # NEW TCP without SYN
71 /sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN
72
73 /sbin/iptables -A INPUT -j BADTCP
74 /sbin/iptables -A FORWARD -j BADTCP
75
76}
77
78iptables_red() {
79 /sbin/iptables -F REDINPUT
80 /sbin/iptables -F REDFORWARD
81 /sbin/iptables -t nat -F REDNAT
82
83 # PPPoE / PPTP Device
84 if [ "$IFACE" != "" ]; then
85 # PPPoE / PPTP
86 if [ "$DEVICE" != "" ]; then
87 /sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT
88 fi
89 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
90 if [ "$RED_DEV" != "" ]; then
91 /sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT
92 fi
93 fi
94 fi
95
96 # PPTP over DHCP
97 if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
98 /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
99 /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
100 fi
101
102 # Orange pinholes
103 if [ "$ORANGE_DEV" != "" ]; then
104 # This rule enables a host on ORANGE network to connect to the outside
105 # (only if we have a red connection)
106 if [ "$IFACE" != "" ]; then
139a9b4f 107 /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
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108 fi
109 fi
110
111 if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
112 # DHCP
113 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
114 /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
115 /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
116 fi
117 if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
118 /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
119 /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
120 fi
121
db073a10 122 # Outgoing masquerading (don't masqerade IPSEC (mark 50))
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123 /sbin/iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
124 /sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
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125
126 fi
127}
128
129# See how we were called.
130case "$1" in
131 start)
132 iptables_init
133
134 # Limit Packets- helps reduce dos/syn attacks
135 # original do nothing line
136 #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec
137 # the correct one, but the negative '!' do nothing...
9efdd899 138 #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN ! -m limit --limit 10/sec -j DROP
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139
140 # Fix for braindead ISP's
141 /sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
142
143 # CUSTOM chains, can be used by the users themselves
144 /sbin/iptables -N CUSTOMINPUT
145 /sbin/iptables -A INPUT -j CUSTOMINPUT
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146 /sbin/iptables -N GUARDIAN
147 /sbin/iptables -A INPUT -j GUARDIAN
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148 /sbin/iptables -N OVPNBLOCK
149 /sbin/iptables -A FORWARD -j OVPNBLOCK
057249ba 150 /sbin/iptables -A FORWARD -j GUARDIAN
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151 /sbin/iptables -N CUSTOMFORWARD
152 /sbin/iptables -A FORWARD -j CUSTOMFORWARD
153 /sbin/iptables -N CUSTOMOUTPUT
690b0bd7 154 /sbin/iptables -A OUTPUT -j OVPNBLOCK
ef6f983b 155 /sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
3a1019f6 156 /sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
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157 /sbin/iptables -N OUTGOINGFW
158 /sbin/iptables -A OUTPUT -j OUTGOINGFW
3a1019f6 159 /sbin/iptables -t nat -N CUSTOMPREROUTING
690b0bd7 160 /sbin/iptables -t nat -N OVPNNAT
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161 /sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
162 /sbin/iptables -t nat -N CUSTOMPOSTROUTING
163 /sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
690b0bd7 164 /sbin/iptables -t nat -A POSTROUTING -j OVPNNAT
3a1019f6 165
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166 # IPTV chains for IGMPPROXY
167 /sbin/iptables -N IPTVINPUT
168 /sbin/iptables -A INPUT -j IPTVINPUT
169 /sbin/iptables -N IPTVFORWARD
170 /sbin/iptables -A FORWARD -j IPTVFORWARD
171
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172 # Filtering ovpn networks INPUT
173 /sbin/iptables -A INPUT -j OVPNBLOCK
174
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175 # filtering from GUI
176 /sbin/iptables -N GUIINPUT
177 /sbin/iptables -A INPUT -j GUIINPUT
905fbf3e 178 /sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT
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179
180 # Accept everything connected
181 /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
182 /sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
5fd30232 183
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184 # Accept everything on lo
185 iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
186 iptables -A OUTPUT -o lo -m state --state NEW -j ACCEPT
187
5fd30232 188 # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
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189 /sbin/iptables -N IPSECINPUT
190 /sbin/iptables -N IPSECFORWARD
191 /sbin/iptables -N IPSECOUTPUT
5fd30232 192 /sbin/iptables -N OPENSSLVIRTUAL
6652626c 193 /sbin/iptables -A INPUT -j IPSECINPUT
5595bc03 194 /sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT"
6652626c 195 /sbin/iptables -A FORWARD -j IPSECFORWARD
5595bc03 196 /sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD"
6652626c 197 /sbin/iptables -A OUTPUT -j IPSECOUTPUT
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198 /sbin/iptables -t nat -N IPSECNAT
199 /sbin/iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14 200
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201 # Input Firewall
202 /sbin/iptables -N INPUTFW
203 /sbin/iptables -A INPUT -m state --state NEW -j INPUTFW
204
3a1019f6 205 # localhost and ethernet.
d8158ca6 206 /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
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207 /sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo
208 /sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP
cae0079c 209 /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
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210 /sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
211 /sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
dd79c399 212 /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT ! -p icmp
218b3341 213
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214 # allow DHCP on BLUE to be turned on/off
215 /sbin/iptables -N DHCPBLUEINPUT
216 /sbin/iptables -A INPUT -j DHCPBLUEINPUT
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217
218 # WIRELESS chains
219 /sbin/iptables -N WIRELESSINPUT
220 /sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT
221 /sbin/iptables -N WIRELESSFORWARD
9efd8d1c 222 /sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD
12dcfbbd 223
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224 # Forward Firewall
225 /sbin/iptables -N FORWARDFW
226 /sbin/iptables -A FORWARD -j FORWARDFW
227
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228 # PORTFWACCESS chain, used for portforwarding
229 /sbin/iptables -N PORTFWACCESS
230 /sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS
231
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232 # OPenSSL
233 /sbin/iptables -N OPENSSLPHYSICAL
234 /sbin/iptables -A INPUT -j OPENSSLPHYSICAL
3a1019f6 235
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236 # RED chain, used for the red interface
237 /sbin/iptables -N REDINPUT
238 /sbin/iptables -A INPUT -j REDINPUT
239 /sbin/iptables -N REDFORWARD
240 /sbin/iptables -A FORWARD -j REDFORWARD
241 /sbin/iptables -t nat -N REDNAT
242 /sbin/iptables -t nat -A POSTROUTING -j REDNAT
243
244 iptables_red
218b3341 245
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246 # Custom prerouting chains (for transparent proxy and port forwarding)
247 /sbin/iptables -t nat -N SQUID
248 /sbin/iptables -t nat -A PREROUTING -j SQUID
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249 /sbin/iptables -t nat -N NAT_DESTINATION
250 /sbin/iptables -t nat -N NAT_SOURCE
251 /sbin/iptables -t nat -A PREROUTING -j NAT_DESTINATION
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252 /sbin/iptables -t nat -I POSTROUTING 3 -j NAT_SOURCE
253
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254
255
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256 # upnp chain for our upnp daemon
257 /sbin/iptables -t nat -N UPNPFW
258 /sbin/iptables -t nat -A PREROUTING -j UPNPFW
54194ba4 259 /sbin/iptables -N UPNPFW
42cb3860 260 /sbin/iptables -A FORWARD -m state --state NEW -j UPNPFW
3a1019f6 261
3a1019f6 262 # Postrouting rules (for port forwarding)
690b0bd7 263 /sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT --to-source $GREEN_ADDRESS
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264 if [ "$BLUE_DEV" != "" ]; then
265 /sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS
266 fi
267 if [ "$ORANGE_DEV" != "" ]; then
268 /sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS
269 fi
270
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271 # run local firewall configuration, if present
272 if [ -x /etc/sysconfig/firewall.local ]; then
273 /etc/sysconfig/firewall.local start
274 fi
690b0bd7 275
62fc8511 276 #POLICY CHAIN
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277 /sbin/iptables -N POLICYIN
278 /sbin/iptables -A INPUT -j POLICYIN
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279 /sbin/iptables -N POLICYFWD
280 /sbin/iptables -A FORWARD -j POLICYFWD
281 /sbin/iptables -N POLICYOUT
282 /sbin/iptables -A OUTPUT -j POLICYOUT
b324de14 283
5d7faa45 284 /usr/sbin/firewall-policy
690b0bd7 285
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286 if [ "$DROPINPUT" == "on" ]; then
287 /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT"
288 fi
e41b651b 289 /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
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290 if [ "$DROPFORWARD" == "on" ]; then
291 /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
292 fi
293 /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_FORWARD"
fd10a52c 294 ;;
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295 startovpn)
296 # run openvpn
297 /usr/local/bin/openvpnctrl --create-chains-and-rules
298 ;;
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299 stop)
300 iptables_init
301 # Accept everyting connected
302 /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
303
304 # localhost and ethernet.
305 /sbin/iptables -A INPUT -i lo -j ACCEPT
306 /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT
307
308 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
309 /sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
310 /sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
311 fi
312 if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
313 /sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
314 /sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
315 fi
316
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317 # run local firewall configuration, if present
318 if [ -x /etc/sysconfig/firewall.local ]; then
319 /etc/sysconfig/firewall.local stop
320 fi
c400fe4c 321
3e79f33f 322 /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
c400fe4c 323
5595bc03 324 if [ "$DROPINPUT" == "on" ]; then
c400fe4c 325 /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT"
5595bc03 326 fi
6be0579b 327 if [ "$DROPFORWARD" == "on" ]; then
c400fe4c 328 /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
6be0579b 329 fi
62fc8511 330 /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_FORWARD"
ed31c098 331
6be0579b 332 ;;
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333 stopovpn)
334 # stop openvpn
335 /usr/local/bin/openvpnctrl --delete-chains-and-rules
336 ;;
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337 reload)
338 iptables_red
339
340 # run local firewall configuration, if present
341 if [ -x /etc/sysconfig/firewall.local ]; then
342 /etc/sysconfig/firewall.local reload
343 fi
344 ;;
345 restart)
346 $0 stop
347 $0 start
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348 /usr/local/bin/forwardfwctrl
349 /usr/local/bin/openvpnctrl -s > /dev/null 2>&1
350 /usr/local/bin/openvpnctrl -sn2n > /dev/null 2>&1
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351 ;;
352 *)
353 echo "Usage: $0 {start|stop|reload|restart}"
354 exit 1
355 ;;
356esac
357
358exit 0