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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 [ "$DROPNEWNOTSYN" == "on" ]; then |
97fe1741 | 49 | /sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN " |
5595bc03 | 50 | fi |
97fe1741 | 51 | /sbin/iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN" |
3a1019f6 MT |
52 | |
53 | # Chain to contain all the rules relating to bad TCP flags | |
54 | /sbin/iptables -N BADTCP | |
55 | ||
d8158ca6 | 56 | #Don't check loopback |
a56df4ee | 57 | /sbin/iptables -A BADTCP -i lo -j RETURN |
d8158ca6 | 58 | |
3a1019f6 MT |
59 | # Disallow packets frequently used by port-scanners |
60 | # nmap xmas | |
61 | /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN | |
62 | # Null | |
63 | /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN | |
64 | # FIN | |
65 | /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN | |
66 | # SYN/RST (also catches xmas variants that set SYN+RST+...) | |
67 | /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN | |
68 | # SYN/FIN (QueSO or nmap OS probe) | |
69 | /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN | |
70 | # NEW TCP without SYN | |
71 | /sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN | |
72 | ||
73 | /sbin/iptables -A INPUT -j BADTCP | |
74 | /sbin/iptables -A FORWARD -j BADTCP | |
75 | ||
76 | } | |
77 | ||
78 | iptables_red() { | |
79 | /sbin/iptables -F REDINPUT | |
80 | /sbin/iptables -F REDFORWARD | |
81 | /sbin/iptables -t nat -F REDNAT | |
82 | ||
83 | # PPPoE / PPTP Device | |
84 | if [ "$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 $IFACE -j ACCEPT |
3a1019f6 MT |
108 | fi |
109 | fi | |
110 | ||
111 | if [ "$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 AF |
122 | # Outgoing masquerading (don't masqerade IPSEC (mark 50)) |
123 | /sbin/iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN | |
3a1019f6 MT |
124 | /sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE |
125 | ||
126 | fi | |
127 | } | |
128 | ||
129 | # See how we were called. | |
130 | case "$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 |
3a1019f6 MT |
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 | |
057249ba CS |
146 | /sbin/iptables -N GUARDIAN |
147 | /sbin/iptables -A INPUT -j GUARDIAN | |
148 | /sbin/iptables -A FORWARD -j GUARDIAN | |
3a1019f6 MT |
149 | /sbin/iptables -N CUSTOMFORWARD |
150 | /sbin/iptables -A FORWARD -j CUSTOMFORWARD | |
151 | /sbin/iptables -N CUSTOMOUTPUT | |
152 | /sbin/iptables -A OUTPUT -j CUSTOMOUTPUT | |
4cb74dce | 153 | /sbin/iptables -N OUTGOINGFW |
d9716b06 | 154 | /sbin/iptables -N OUTGOINGFWMAC |
4cb74dce | 155 | /sbin/iptables -A OUTPUT -j OUTGOINGFW |
3a1019f6 MT |
156 | /sbin/iptables -t nat -N CUSTOMPREROUTING |
157 | /sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING | |
158 | /sbin/iptables -t nat -N CUSTOMPOSTROUTING | |
159 | /sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING | |
160 | ||
daa1ceba AF |
161 | # IPTV chains for IGMPPROXY |
162 | /sbin/iptables -N IPTVINPUT | |
163 | /sbin/iptables -A INPUT -j IPTVINPUT | |
164 | /sbin/iptables -N IPTVFORWARD | |
165 | /sbin/iptables -A FORWARD -j IPTVFORWARD | |
166 | ||
3a1019f6 MT |
167 | # filtering from GUI |
168 | /sbin/iptables -N GUIINPUT | |
169 | /sbin/iptables -A INPUT -j GUIINPUT | |
905fbf3e | 170 | /sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT |
3a1019f6 MT |
171 | |
172 | # Accept everything connected | |
173 | /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT | |
174 | /sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT | |
5fd30232 MT |
175 | |
176 | # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything | |
6652626c AF |
177 | /sbin/iptables -N IPSECINPUT |
178 | /sbin/iptables -N IPSECFORWARD | |
179 | /sbin/iptables -N IPSECOUTPUT | |
5fd30232 | 180 | /sbin/iptables -N OPENSSLVIRTUAL |
6652626c | 181 | /sbin/iptables -A INPUT -j IPSECINPUT |
5595bc03 | 182 | /sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT" |
6652626c | 183 | /sbin/iptables -A FORWARD -j IPSECFORWARD |
5595bc03 | 184 | /sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD" |
6652626c | 185 | /sbin/iptables -A OUTPUT -j IPSECOUTPUT |
c4cd0f7b AF |
186 | /sbin/iptables -t nat -N IPSECNAT |
187 | /sbin/iptables -t nat -A POSTROUTING -j IPSECNAT | |
b68e5c14 | 188 | |
4cb74dce | 189 | # Outgoing Firewall |
d9716b06 | 190 | /sbin/iptables -A FORWARD -j OUTGOINGFWMAC |
3f8fbea5 | 191 | /sbin/iptables -A FORWARD -j OUTGOINGFW |
3a1019f6 MT |
192 | |
193 | # localhost and ethernet. | |
d8158ca6 | 194 | /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT |
3a1019f6 MT |
195 | /sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo |
196 | /sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP | |
cae0079c | 197 | /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT |
3a1019f6 MT |
198 | /sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP |
199 | /sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP | |
dd79c399 | 200 | /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT ! -p icmp |
3a1019f6 MT |
201 | /sbin/iptables -A FORWARD -i $GREEN_DEV -m state --state NEW -j ACCEPT |
202 | ||
203 | # If a host on orange tries to initiate a connection to IPFire's red IP and | |
204 | # the connection gets DNATed back through a port forward to a server on orange | |
205 | # we end up with orange -> orange traffic passing through IPFire | |
206 | [ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT | |
207 | ||
3a1019f6 MT |
208 | # allow DHCP on BLUE to be turned on/off |
209 | /sbin/iptables -N DHCPBLUEINPUT | |
210 | /sbin/iptables -A INPUT -j DHCPBLUEINPUT | |
211 | ||
5fd30232 MT |
212 | # OPenSSL |
213 | /sbin/iptables -N OPENSSLPHYSICAL | |
214 | /sbin/iptables -A INPUT -j OPENSSLPHYSICAL | |
3a1019f6 MT |
215 | |
216 | # WIRELESS chains | |
217 | /sbin/iptables -N WIRELESSINPUT | |
218 | /sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT | |
219 | /sbin/iptables -N WIRELESSFORWARD | |
220 | /sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD | |
221 | ||
222 | # RED chain, used for the red interface | |
223 | /sbin/iptables -N REDINPUT | |
224 | /sbin/iptables -A INPUT -j REDINPUT | |
225 | /sbin/iptables -N REDFORWARD | |
226 | /sbin/iptables -A FORWARD -j REDFORWARD | |
227 | /sbin/iptables -t nat -N REDNAT | |
228 | /sbin/iptables -t nat -A POSTROUTING -j REDNAT | |
229 | ||
230 | iptables_red | |
231 | ||
232 | # DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow | |
233 | # ORANGE to talk to GREEN / BLUE. | |
234 | /sbin/iptables -N DMZHOLES | |
235 | if [ "$ORANGE_DEV" != "" ]; then | |
236 | /sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES | |
237 | fi | |
238 | ||
239 | # XTACCESS chain, used for external access | |
240 | /sbin/iptables -N XTACCESS | |
241 | /sbin/iptables -A INPUT -m state --state NEW -j XTACCESS | |
242 | ||
243 | # PORTFWACCESS chain, used for portforwarding | |
244 | /sbin/iptables -N PORTFWACCESS | |
245 | /sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS | |
246 | ||
247 | # Custom prerouting chains (for transparent proxy and port forwarding) | |
248 | /sbin/iptables -t nat -N SQUID | |
249 | /sbin/iptables -t nat -A PREROUTING -j SQUID | |
250 | /sbin/iptables -t nat -N PORTFW | |
251 | /sbin/iptables -t nat -A PREROUTING -j PORTFW | |
252 | ||
7e7495b3 MT |
253 | # upnp chain for our upnp daemon |
254 | /sbin/iptables -t nat -N UPNPFW | |
255 | /sbin/iptables -t nat -A PREROUTING -j UPNPFW | |
54194ba4 MT |
256 | # This chain only contains dummy rules. |
257 | /sbin/iptables -N UPNPFW | |
3a1019f6 MT |
258 | |
259 | # Custom mangle chain (for port fowarding) | |
260 | /sbin/iptables -t mangle -N PORTFWMANGLE | |
261 | /sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE | |
262 | ||
263 | # Postrouting rules (for port forwarding) | |
264 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \ | |
265 | --to-source $GREEN_ADDRESS | |
266 | if [ "$BLUE_DEV" != "" ]; then | |
267 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS | |
268 | fi | |
269 | if [ "$ORANGE_DEV" != "" ]; then | |
270 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS | |
271 | fi | |
272 | ||
3a1019f6 MT |
273 | # run local firewall configuration, if present |
274 | if [ -x /etc/sysconfig/firewall.local ]; then | |
275 | /etc/sysconfig/firewall.local start | |
276 | fi | |
277 | ||
278 | # last rule in input and forward chain is for logging. | |
5595bc03 CS |
279 | |
280 | if [ "$DROPINPUT" == "on" ]; then | |
97fe1741 | 281 | /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT " |
5595bc03 | 282 | fi |
97fe1741 | 283 | /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT" |
5595bc03 | 284 | if [ "$DROPOUTPUT" == "on" ]; then |
97fe1741 | 285 | /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT " |
5595bc03 | 286 | fi |
97fe1741 | 287 | /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT" |
3a1019f6 | 288 | ;; |
13211b21 CS |
289 | startovpn) |
290 | # run openvpn | |
291 | /usr/local/bin/openvpnctrl --create-chains-and-rules | |
292 | ;; | |
3a1019f6 MT |
293 | stop) |
294 | iptables_init | |
295 | # Accept everyting connected | |
296 | /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT | |
297 | ||
298 | # localhost and ethernet. | |
299 | /sbin/iptables -A INPUT -i lo -j ACCEPT | |
300 | /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT | |
301 | ||
302 | if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then | |
303 | /sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
304 | /sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
305 | fi | |
306 | if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then | |
307 | /sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
308 | /sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
309 | fi | |
310 | ||
3a1019f6 MT |
311 | # run local firewall configuration, if present |
312 | if [ -x /etc/sysconfig/firewall.local ]; then | |
313 | /etc/sysconfig/firewall.local stop | |
314 | fi | |
315 | ||
5595bc03 | 316 | if [ "$DROPINPUT" == "on" ]; then |
97fe1741 | 317 | /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT " |
5595bc03 | 318 | fi |
97fe1741 | 319 | /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT" |
5595bc03 | 320 | if [ "$DROPOUTPUT" == "on" ]; then |
97fe1741 | 321 | /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT " |
5595bc03 | 322 | fi |
97fe1741 | 323 | /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT" |
3a1019f6 | 324 | ;; |
13211b21 CS |
325 | stopovpn) |
326 | # stop openvpn | |
327 | /usr/local/bin/openvpnctrl --delete-chains-and-rules | |
328 | ;; | |
3a1019f6 MT |
329 | reload) |
330 | iptables_red | |
331 | ||
332 | # run local firewall configuration, if present | |
333 | if [ -x /etc/sysconfig/firewall.local ]; then | |
334 | /etc/sysconfig/firewall.local reload | |
335 | fi | |
336 | ;; | |
337 | restart) | |
338 | $0 stop | |
339 | $0 start | |
340 | ;; | |
341 | *) | |
342 | echo "Usage: $0 {start|stop|reload|restart}" | |
343 | exit 1 | |
344 | ;; | |
345 | esac | |
346 | ||
347 | exit 0 |