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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 [ "$DROPNEWNOTSYN" == "on" ]; then |
97fe1741 | 49 | /sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN " |
5595bc03 | 50 | fi |
97fe1741 | 51 | /sbin/iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN" |
3a1019f6 MT |
52 | |
53 | # Chain to contain all the rules relating to bad TCP flags | |
54 | /sbin/iptables -N BADTCP | |
55 | ||
56 | # Disallow packets frequently used by port-scanners | |
57 | # nmap xmas | |
58 | /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN | |
59 | # Null | |
60 | /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN | |
61 | # FIN | |
62 | /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN | |
63 | # SYN/RST (also catches xmas variants that set SYN+RST+...) | |
64 | /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN | |
65 | # SYN/FIN (QueSO or nmap OS probe) | |
66 | /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN | |
67 | # NEW TCP without SYN | |
68 | /sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN | |
69 | ||
70 | /sbin/iptables -A INPUT -j BADTCP | |
71 | /sbin/iptables -A FORWARD -j BADTCP | |
72 | ||
73 | } | |
74 | ||
75 | iptables_red() { | |
76 | /sbin/iptables -F REDINPUT | |
77 | /sbin/iptables -F REDFORWARD | |
78 | /sbin/iptables -t nat -F REDNAT | |
79 | ||
80 | # PPPoE / PPTP Device | |
81 | if [ "$IFACE" != "" ]; then | |
82 | # PPPoE / PPTP | |
83 | if [ "$DEVICE" != "" ]; then | |
84 | /sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT | |
85 | fi | |
86 | if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then | |
87 | if [ "$RED_DEV" != "" ]; then | |
88 | /sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT | |
89 | fi | |
90 | fi | |
91 | fi | |
92 | ||
93 | # PPTP over DHCP | |
94 | if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then | |
95 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT | |
96 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT | |
97 | fi | |
98 | ||
99 | # Orange pinholes | |
100 | if [ "$ORANGE_DEV" != "" ]; then | |
101 | # This rule enables a host on ORANGE network to connect to the outside | |
102 | # (only if we have a red connection) | |
103 | if [ "$IFACE" != "" ]; then | |
139a9b4f | 104 | /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT |
3a1019f6 MT |
105 | fi |
106 | fi | |
107 | ||
108 | if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then | |
109 | # DHCP | |
110 | if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then | |
111 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
112 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
113 | fi | |
114 | if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then | |
115 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
116 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
117 | fi | |
118 | ||
db073a10 AF |
119 | # Outgoing masquerading (don't masqerade IPSEC (mark 50)) |
120 | /sbin/iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN | |
3a1019f6 MT |
121 | /sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE |
122 | ||
123 | fi | |
124 | } | |
125 | ||
126 | # See how we were called. | |
127 | case "$1" in | |
128 | start) | |
129 | iptables_init | |
130 | ||
131 | # Limit Packets- helps reduce dos/syn attacks | |
132 | # original do nothing line | |
133 | #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec | |
134 | # the correct one, but the negative '!' do nothing... | |
9efdd899 | 135 | #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN ! -m limit --limit 10/sec -j DROP |
3a1019f6 MT |
136 | |
137 | # Fix for braindead ISP's | |
138 | /sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu | |
139 | ||
140 | # CUSTOM chains, can be used by the users themselves | |
141 | /sbin/iptables -N CUSTOMINPUT | |
142 | /sbin/iptables -A INPUT -j CUSTOMINPUT | |
e050adc8 CS |
143 | /sbin/iptables -N GUARDIANINPUT |
144 | /sbin/iptables -A INPUT -j GUARDIANINPUT | |
3a1019f6 MT |
145 | /sbin/iptables -N CUSTOMFORWARD |
146 | /sbin/iptables -A FORWARD -j CUSTOMFORWARD | |
147 | /sbin/iptables -N CUSTOMOUTPUT | |
148 | /sbin/iptables -A OUTPUT -j CUSTOMOUTPUT | |
4cb74dce | 149 | /sbin/iptables -N OUTGOINGFW |
d9716b06 | 150 | /sbin/iptables -N OUTGOINGFWMAC |
4cb74dce | 151 | /sbin/iptables -A OUTPUT -j OUTGOINGFW |
3a1019f6 MT |
152 | /sbin/iptables -t nat -N CUSTOMPREROUTING |
153 | /sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING | |
154 | /sbin/iptables -t nat -N CUSTOMPOSTROUTING | |
155 | /sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING | |
156 | ||
daa1ceba AF |
157 | # IPTV chains for IGMPPROXY |
158 | /sbin/iptables -N IPTVINPUT | |
159 | /sbin/iptables -A INPUT -j IPTVINPUT | |
160 | /sbin/iptables -N IPTVFORWARD | |
161 | /sbin/iptables -A FORWARD -j IPTVFORWARD | |
162 | ||
3a1019f6 MT |
163 | # filtering from GUI |
164 | /sbin/iptables -N GUIINPUT | |
165 | /sbin/iptables -A INPUT -j GUIINPUT | |
905fbf3e | 166 | /sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT |
3a1019f6 MT |
167 | |
168 | # Accept everything connected | |
169 | /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT | |
170 | /sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT | |
5fd30232 MT |
171 | |
172 | # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything | |
6652626c AF |
173 | /sbin/iptables -N IPSECINPUT |
174 | /sbin/iptables -N IPSECFORWARD | |
175 | /sbin/iptables -N IPSECOUTPUT | |
5fd30232 | 176 | /sbin/iptables -N OPENSSLVIRTUAL |
6652626c | 177 | /sbin/iptables -A INPUT -j IPSECINPUT |
5595bc03 | 178 | /sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT" |
6652626c | 179 | /sbin/iptables -A FORWARD -j IPSECFORWARD |
5595bc03 | 180 | /sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD" |
6652626c | 181 | /sbin/iptables -A OUTPUT -j IPSECOUTPUT |
c4cd0f7b AF |
182 | /sbin/iptables -t nat -N IPSECNAT |
183 | /sbin/iptables -t nat -A POSTROUTING -j IPSECNAT | |
b68e5c14 | 184 | |
4cb74dce | 185 | # Outgoing Firewall |
d9716b06 | 186 | /sbin/iptables -A FORWARD -j OUTGOINGFWMAC |
3f8fbea5 | 187 | /sbin/iptables -A FORWARD -j OUTGOINGFW |
3a1019f6 MT |
188 | |
189 | # localhost and ethernet. | |
190 | /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT | |
191 | /sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo | |
192 | /sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP | |
193 | /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT | |
194 | /sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP | |
195 | /sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP | |
dd79c399 | 196 | /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT ! -p icmp |
3a1019f6 MT |
197 | /sbin/iptables -A FORWARD -i $GREEN_DEV -m state --state NEW -j ACCEPT |
198 | ||
199 | # If a host on orange tries to initiate a connection to IPFire's red IP and | |
200 | # the connection gets DNATed back through a port forward to a server on orange | |
201 | # we end up with orange -> orange traffic passing through IPFire | |
202 | [ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT | |
203 | ||
3a1019f6 MT |
204 | # allow DHCP on BLUE to be turned on/off |
205 | /sbin/iptables -N DHCPBLUEINPUT | |
206 | /sbin/iptables -A INPUT -j DHCPBLUEINPUT | |
207 | ||
5fd30232 MT |
208 | # OPenSSL |
209 | /sbin/iptables -N OPENSSLPHYSICAL | |
210 | /sbin/iptables -A INPUT -j OPENSSLPHYSICAL | |
3a1019f6 MT |
211 | |
212 | # WIRELESS chains | |
213 | /sbin/iptables -N WIRELESSINPUT | |
214 | /sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT | |
215 | /sbin/iptables -N WIRELESSFORWARD | |
216 | /sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD | |
217 | ||
218 | # RED chain, used for the red interface | |
219 | /sbin/iptables -N REDINPUT | |
220 | /sbin/iptables -A INPUT -j REDINPUT | |
221 | /sbin/iptables -N REDFORWARD | |
222 | /sbin/iptables -A FORWARD -j REDFORWARD | |
223 | /sbin/iptables -t nat -N REDNAT | |
224 | /sbin/iptables -t nat -A POSTROUTING -j REDNAT | |
225 | ||
226 | iptables_red | |
227 | ||
228 | # DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow | |
229 | # ORANGE to talk to GREEN / BLUE. | |
230 | /sbin/iptables -N DMZHOLES | |
231 | if [ "$ORANGE_DEV" != "" ]; then | |
232 | /sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES | |
233 | fi | |
234 | ||
235 | # XTACCESS chain, used for external access | |
236 | /sbin/iptables -N XTACCESS | |
237 | /sbin/iptables -A INPUT -m state --state NEW -j XTACCESS | |
238 | ||
239 | # PORTFWACCESS chain, used for portforwarding | |
240 | /sbin/iptables -N PORTFWACCESS | |
241 | /sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS | |
242 | ||
243 | # Custom prerouting chains (for transparent proxy and port forwarding) | |
244 | /sbin/iptables -t nat -N SQUID | |
245 | /sbin/iptables -t nat -A PREROUTING -j SQUID | |
246 | /sbin/iptables -t nat -N PORTFW | |
247 | /sbin/iptables -t nat -A PREROUTING -j PORTFW | |
248 | ||
7e7495b3 MT |
249 | # upnp chain for our upnp daemon |
250 | /sbin/iptables -t nat -N UPNPFW | |
251 | /sbin/iptables -t nat -A PREROUTING -j UPNPFW | |
252 | ||
3a1019f6 MT |
253 | |
254 | # Custom mangle chain (for port fowarding) | |
255 | /sbin/iptables -t mangle -N PORTFWMANGLE | |
256 | /sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE | |
257 | ||
258 | # Postrouting rules (for port forwarding) | |
259 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \ | |
260 | --to-source $GREEN_ADDRESS | |
261 | if [ "$BLUE_DEV" != "" ]; then | |
262 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS | |
263 | fi | |
264 | if [ "$ORANGE_DEV" != "" ]; then | |
265 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS | |
266 | fi | |
267 | ||
3a1019f6 MT |
268 | # run local firewall configuration, if present |
269 | if [ -x /etc/sysconfig/firewall.local ]; then | |
270 | /etc/sysconfig/firewall.local start | |
271 | fi | |
272 | ||
273 | # last rule in input and forward chain is for logging. | |
5595bc03 CS |
274 | |
275 | if [ "$DROPINPUT" == "on" ]; then | |
97fe1741 | 276 | /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT " |
5595bc03 | 277 | fi |
97fe1741 | 278 | /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT" |
5595bc03 | 279 | if [ "$DROPOUTPUT" == "on" ]; then |
97fe1741 | 280 | /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT " |
5595bc03 | 281 | fi |
97fe1741 | 282 | /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT" |
3a1019f6 | 283 | ;; |
13211b21 CS |
284 | startovpn) |
285 | # run openvpn | |
286 | /usr/local/bin/openvpnctrl --create-chains-and-rules | |
287 | ;; | |
3a1019f6 MT |
288 | stop) |
289 | iptables_init | |
290 | # Accept everyting connected | |
291 | /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT | |
292 | ||
293 | # localhost and ethernet. | |
294 | /sbin/iptables -A INPUT -i lo -j ACCEPT | |
295 | /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT | |
296 | ||
297 | if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then | |
298 | /sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
299 | /sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
300 | fi | |
301 | if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then | |
302 | /sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
303 | /sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
304 | fi | |
305 | ||
3a1019f6 MT |
306 | # run local firewall configuration, if present |
307 | if [ -x /etc/sysconfig/firewall.local ]; then | |
308 | /etc/sysconfig/firewall.local stop | |
309 | fi | |
310 | ||
5595bc03 | 311 | if [ "$DROPINPUT" == "on" ]; then |
97fe1741 | 312 | /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT " |
5595bc03 | 313 | fi |
97fe1741 | 314 | /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT" |
5595bc03 | 315 | if [ "$DROPOUTPUT" == "on" ]; then |
97fe1741 | 316 | /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT " |
5595bc03 | 317 | fi |
97fe1741 | 318 | /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT" |
3a1019f6 | 319 | ;; |
13211b21 CS |
320 | stopovpn) |
321 | # stop openvpn | |
322 | /usr/local/bin/openvpnctrl --delete-chains-and-rules | |
323 | ;; | |
3a1019f6 MT |
324 | reload) |
325 | iptables_red | |
326 | ||
327 | # run local firewall configuration, if present | |
328 | if [ -x /etc/sysconfig/firewall.local ]; then | |
329 | /etc/sysconfig/firewall.local reload | |
330 | fi | |
331 | ;; | |
332 | restart) | |
333 | $0 stop | |
334 | $0 start | |
335 | ;; | |
336 | *) | |
337 | echo "Usage: $0 {start|stop|reload|restart}" | |
338 | exit 1 | |
339 | ;; | |
340 | esac | |
341 | ||
342 | exit 0 |