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Commit | Line | Data |
---|---|---|
3a1019f6 MT |
1 | #!/bin/sh |
2 | ||
3 | eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings) | |
4 | eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings) | |
fe0cd647 | 5 | eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings) |
3a1019f6 MT |
6 | IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'` |
7 | ||
8 | if [ -f /var/ipfire/red/device ]; then | |
9 | DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'` | |
10 | fi | |
11 | ||
12 | iptables_init() { | |
13 | # Flush all rules and delete all custom chains | |
14 | /sbin/iptables -F | |
15 | /sbin/iptables -t nat -F | |
16 | /sbin/iptables -t mangle -F | |
17 | /sbin/iptables -X | |
18 | /sbin/iptables -t nat -X | |
19 | /sbin/iptables -t mangle -X | |
20 | ||
21 | # Set up policies | |
22 | /sbin/iptables -P INPUT DROP | |
23 | /sbin/iptables -P FORWARD DROP | |
24 | /sbin/iptables -P OUTPUT ACCEPT | |
25 | ||
26 | # Empty LOG_DROP and LOG_REJECT chains | |
27 | /sbin/iptables -N LOG_DROP | |
28 | /sbin/iptables -A LOG_DROP -m limit --limit 10/minute -j LOG | |
29 | /sbin/iptables -A LOG_DROP -j DROP | |
30 | /sbin/iptables -N LOG_REJECT | |
31 | /sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG | |
32 | /sbin/iptables -A LOG_REJECT -j REJECT | |
33 | ||
34 | # This chain will log, then DROPs packets with certain bad combinations | |
35 | # of flags might indicate a port-scan attempt (xmas, null, etc) | |
36 | /sbin/iptables -N PSCAN | |
5595bc03 | 37 | if [ "$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" |
97fe1741 CS |
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" |
3a1019f6 MT |
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" |
3a1019f6 MT |
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 | |
3a1019f6 MT |
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 | |
b85d2a98 MT |
71 | /sbin/iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN |
72 | ||
c0359d6d MT |
73 | /sbin/iptables -A INPUT -p tcp -j BADTCP |
74 | /sbin/iptables -A FORWARD -p tcp -j BADTCP | |
75 | ||
b85d2a98 MT |
76 | # Connection tracking chain |
77 | /sbin/iptables -N CONNTRACK | |
78 | /sbin/iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT | |
3a1019f6 | 79 | |
3a1019f6 MT |
80 | # Fix for braindead ISP's |
81 | /sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu | |
82 | ||
83 | # CUSTOM chains, can be used by the users themselves | |
84 | /sbin/iptables -N CUSTOMINPUT | |
85 | /sbin/iptables -A INPUT -j CUSTOMINPUT | |
057249ba CS |
86 | /sbin/iptables -N GUARDIAN |
87 | /sbin/iptables -A INPUT -j GUARDIAN | |
690b0bd7 AM |
88 | /sbin/iptables -N OVPNBLOCK |
89 | /sbin/iptables -A FORWARD -j OVPNBLOCK | |
057249ba | 90 | /sbin/iptables -A FORWARD -j GUARDIAN |
3a1019f6 MT |
91 | /sbin/iptables -N CUSTOMFORWARD |
92 | /sbin/iptables -A FORWARD -j CUSTOMFORWARD | |
93 | /sbin/iptables -N CUSTOMOUTPUT | |
690b0bd7 | 94 | /sbin/iptables -A OUTPUT -j OVPNBLOCK |
3a1019f6 | 95 | /sbin/iptables -A OUTPUT -j CUSTOMOUTPUT |
4cb74dce MT |
96 | /sbin/iptables -N OUTGOINGFW |
97 | /sbin/iptables -A OUTPUT -j OUTGOINGFW | |
3a1019f6 | 98 | /sbin/iptables -t nat -N CUSTOMPREROUTING |
690b0bd7 | 99 | /sbin/iptables -t nat -N OVPNNAT |
3a1019f6 MT |
100 | /sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING |
101 | /sbin/iptables -t nat -N CUSTOMPOSTROUTING | |
102 | /sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING | |
690b0bd7 | 103 | /sbin/iptables -t nat -A POSTROUTING -j OVPNNAT |
3a1019f6 | 104 | |
daa1ceba AF |
105 | # IPTV chains for IGMPPROXY |
106 | /sbin/iptables -N IPTVINPUT | |
107 | /sbin/iptables -A INPUT -j IPTVINPUT | |
108 | /sbin/iptables -N IPTVFORWARD | |
109 | /sbin/iptables -A FORWARD -j IPTVFORWARD | |
110 | ||
690b0bd7 AM |
111 | # Filtering ovpn networks INPUT |
112 | /sbin/iptables -A INPUT -j OVPNBLOCK | |
113 | ||
3a1019f6 MT |
114 | # filtering from GUI |
115 | /sbin/iptables -N GUIINPUT | |
116 | /sbin/iptables -A INPUT -j GUIINPUT | |
905fbf3e | 117 | /sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT |
3a1019f6 MT |
118 | |
119 | # Accept everything connected | |
b85d2a98 MT |
120 | for i in INPUT FORWARD OUTPUT; do |
121 | /sbin/iptables -A ${i} -j CONNTRACK | |
122 | done | |
123 | ||
ef6f983b | 124 | # Accept everything on lo |
b85d2a98 MT |
125 | iptables -A INPUT -i lo -m conntrack --ctstate NEW -j ACCEPT |
126 | iptables -A OUTPUT -o lo -m conntrack --ctstate NEW -j ACCEPT | |
ef6f983b | 127 | |
5fd30232 | 128 | # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything |
6652626c AF |
129 | /sbin/iptables -N IPSECINPUT |
130 | /sbin/iptables -N IPSECFORWARD | |
131 | /sbin/iptables -N IPSECOUTPUT | |
5fd30232 | 132 | /sbin/iptables -N OPENSSLVIRTUAL |
6652626c | 133 | /sbin/iptables -A INPUT -j IPSECINPUT |
5595bc03 | 134 | /sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT" |
6652626c | 135 | /sbin/iptables -A FORWARD -j IPSECFORWARD |
5595bc03 | 136 | /sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD" |
6652626c | 137 | /sbin/iptables -A OUTPUT -j IPSECOUTPUT |
c4cd0f7b AF |
138 | /sbin/iptables -t nat -N IPSECNAT |
139 | /sbin/iptables -t nat -A POSTROUTING -j IPSECNAT | |
b68e5c14 | 140 | |
231499fc AM |
141 | # Input Firewall |
142 | /sbin/iptables -N INPUTFW | |
b85d2a98 | 143 | /sbin/iptables -A INPUT -m conntrack --ctstate NEW -j INPUTFW |
231499fc | 144 | |
3a1019f6 | 145 | # localhost and ethernet. |
b85d2a98 MT |
146 | /sbin/iptables -A INPUT -i lo -m conntrack --ctstate NEW -j ACCEPT |
147 | /sbin/iptables -A INPUT -s 127.0.0.0/8 -m conntrack --ctstate NEW -j DROP # Loopback not on lo | |
148 | /sbin/iptables -A INPUT -d 127.0.0.0/8 -m conntrack --ctstate NEW -j DROP | |
149 | /sbin/iptables -A FORWARD -i lo -m conntrack --ctstate NEW -j ACCEPT | |
150 | /sbin/iptables -A FORWARD -s 127.0.0.0/8 -m conntrack --ctstate NEW -j DROP | |
151 | /sbin/iptables -A FORWARD -d 127.0.0.0/8 -m conntrack --ctstate NEW -j DROP | |
152 | /sbin/iptables -A INPUT -i $GREEN_DEV -m conntrack --ctstate NEW -j ACCEPT ! -p icmp | |
218b3341 | 153 | |
3a1019f6 MT |
154 | # allow DHCP on BLUE to be turned on/off |
155 | /sbin/iptables -N DHCPBLUEINPUT | |
156 | /sbin/iptables -A INPUT -j DHCPBLUEINPUT | |
81393987 AM |
157 | |
158 | # WIRELESS chains | |
159 | /sbin/iptables -N WIRELESSINPUT | |
b85d2a98 | 160 | /sbin/iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT |
81393987 | 161 | /sbin/iptables -N WIRELESSFORWARD |
b85d2a98 | 162 | /sbin/iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD |
12dcfbbd | 163 | |
93b75f31 AM |
164 | # Forward Firewall |
165 | /sbin/iptables -N FORWARDFW | |
166 | /sbin/iptables -A FORWARD -j FORWARDFW | |
167 | ||
5fd30232 MT |
168 | # OPenSSL |
169 | /sbin/iptables -N OPENSSLPHYSICAL | |
170 | /sbin/iptables -A INPUT -j OPENSSLPHYSICAL | |
3a1019f6 | 171 | |
3a1019f6 MT |
172 | # RED chain, used for the red interface |
173 | /sbin/iptables -N REDINPUT | |
174 | /sbin/iptables -A INPUT -j REDINPUT | |
175 | /sbin/iptables -N REDFORWARD | |
176 | /sbin/iptables -A FORWARD -j REDFORWARD | |
177 | /sbin/iptables -t nat -N REDNAT | |
178 | /sbin/iptables -t nat -A POSTROUTING -j REDNAT | |
179 | ||
180 | iptables_red | |
218b3341 | 181 | |
3a1019f6 MT |
182 | # Custom prerouting chains (for transparent proxy and port forwarding) |
183 | /sbin/iptables -t nat -N SQUID | |
184 | /sbin/iptables -t nat -A PREROUTING -j SQUID | |
9efd8d1c AM |
185 | /sbin/iptables -t nat -N NAT_DESTINATION |
186 | /sbin/iptables -t nat -N NAT_SOURCE | |
187 | /sbin/iptables -t nat -A PREROUTING -j NAT_DESTINATION | |
690b0bd7 AM |
188 | /sbin/iptables -t nat -I POSTROUTING 3 -j NAT_SOURCE |
189 | ||
9efd8d1c AM |
190 | |
191 | ||
7e7495b3 MT |
192 | # upnp chain for our upnp daemon |
193 | /sbin/iptables -t nat -N UPNPFW | |
194 | /sbin/iptables -t nat -A PREROUTING -j UPNPFW | |
54194ba4 | 195 | /sbin/iptables -N UPNPFW |
b85d2a98 | 196 | /sbin/iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW |
3a1019f6 | 197 | |
3a1019f6 | 198 | # Postrouting rules (for port forwarding) |
690b0bd7 | 199 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT --to-source $GREEN_ADDRESS |
3a1019f6 MT |
200 | if [ "$BLUE_DEV" != "" ]; then |
201 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS | |
202 | fi | |
203 | if [ "$ORANGE_DEV" != "" ]; then | |
204 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS | |
205 | fi | |
206 | ||
3a1019f6 MT |
207 | # run local firewall configuration, if present |
208 | if [ -x /etc/sysconfig/firewall.local ]; then | |
209 | /etc/sysconfig/firewall.local start | |
210 | fi | |
690b0bd7 | 211 | |
ff4770c7 AM |
212 | # run openvpn |
213 | /usr/local/bin/openvpnctrl --create-chains-and-rules | |
214 | ||
215 | # run wirelessctrl | |
216 | /usr/local/bin/wirelessctrl | |
217 | ||
62fc8511 | 218 | #POLICY CHAIN |
a9b3ae26 AM |
219 | /sbin/iptables -N POLICYIN |
220 | /sbin/iptables -A INPUT -j POLICYIN | |
5d7faa45 AM |
221 | /sbin/iptables -N POLICYFWD |
222 | /sbin/iptables -A FORWARD -j POLICYFWD | |
223 | /sbin/iptables -N POLICYOUT | |
224 | /sbin/iptables -A OUTPUT -j POLICYOUT | |
b324de14 | 225 | |
5d7faa45 | 226 | /usr/sbin/firewall-policy |
690b0bd7 | 227 | |
ff4770c7 AM |
228 | # read new firewall |
229 | /usr/local/bin/forwardfwctrl | |
230 | ||
690b0bd7 AM |
231 | if [ "$DROPINPUT" == "on" ]; then |
232 | /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT" | |
233 | fi | |
e41b651b | 234 | /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT" |
690b0bd7 AM |
235 | if [ "$DROPFORWARD" == "on" ]; then |
236 | /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD" | |
237 | fi | |
238 | /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_FORWARD" | |
ff4770c7 | 239 | } |
3a1019f6 | 240 | |
ff4770c7 AM |
241 | iptables_red() { |
242 | /sbin/iptables -F REDINPUT | |
243 | /sbin/iptables -F REDFORWARD | |
244 | /sbin/iptables -t nat -F REDNAT | |
3a1019f6 | 245 | |
ff4770c7 AM |
246 | # PPPoE / PPTP Device |
247 | if [ "$IFACE" != "" ]; then | |
248 | # PPPoE / PPTP | |
249 | if [ "$DEVICE" != "" ]; then | |
250 | /sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT | |
251 | fi | |
252 | if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then | |
253 | if [ "$RED_DEV" != "" ]; then | |
254 | /sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT | |
255 | fi | |
256 | fi | |
3a1019f6 | 257 | fi |
ff4770c7 AM |
258 | |
259 | # PPTP over DHCP | |
260 | if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then | |
261 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT | |
262 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT | |
3a1019f6 MT |
263 | fi |
264 | ||
ff4770c7 AM |
265 | # Orange pinholes |
266 | if [ "$ORANGE_DEV" != "" ]; then | |
267 | # This rule enables a host on ORANGE network to connect to the outside | |
268 | # (only if we have a red connection) | |
269 | if [ "$IFACE" != "" ]; then | |
270 | /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT | |
271 | fi | |
3a1019f6 | 272 | fi |
c400fe4c | 273 | |
ff4770c7 AM |
274 | if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then |
275 | # DHCP | |
276 | if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then | |
277 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
278 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
279 | fi | |
280 | if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then | |
281 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
282 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
283 | fi | |
284 | ||
285 | # Outgoing masquerading (don't masqerade IPSEC (mark 50)) | |
286 | /sbin/iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN | |
287 | /sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE | |
c400fe4c | 288 | |
6be0579b | 289 | fi |
ff4770c7 AM |
290 | } |
291 | ||
292 | # See how we were called. | |
293 | case "$1" in | |
294 | start) | |
295 | iptables_init | |
6be0579b | 296 | ;; |
3a1019f6 MT |
297 | reload) |
298 | iptables_red | |
3a1019f6 | 299 | # run local firewall configuration, if present |
ff4770c7 | 300 | if [ -x /etc/sysconfig/firewall.local ]; then |
3a1019f6 MT |
301 | /etc/sysconfig/firewall.local reload |
302 | fi | |
303 | ;; | |
304 | restart) | |
ff4770c7 AM |
305 | # run local firewall configuration, if present |
306 | if [ -x /etc/sysconfig/firewall.local ]; then | |
307 | /etc/sysconfig/firewall.local stop | |
308 | fi | |
3a1019f6 MT |
309 | $0 start |
310 | ;; | |
311 | *) | |
ff4770c7 | 312 | echo "Usage: $0 {start|reload|restart}" |
3a1019f6 MT |
313 | exit 1 |
314 | ;; | |
315 | esac | |
316 | ||
317 | exit 0 |