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Commit | Line | Data |
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1 | #!/bin/sh | |
2 | ||
3 | eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings) | |
4 | eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings) | |
5 | eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings) | |
6 | IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'` | |
7 | ||
8 | if [ -f /var/ipfire/red/device ]; then | |
9 | DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'` | |
10 | fi | |
11 | ||
12 | iptables_init() { | |
13 | # Flush all rules and delete all custom chains | |
14 | /sbin/iptables -F | |
15 | /sbin/iptables -t nat -F | |
16 | /sbin/iptables -t mangle -F | |
17 | /sbin/iptables -X | |
18 | /sbin/iptables -t nat -X | |
19 | /sbin/iptables -t mangle -X | |
20 | ||
21 | # Set up policies | |
22 | /sbin/iptables -P INPUT DROP | |
23 | /sbin/iptables -P FORWARD DROP | |
24 | /sbin/iptables -P OUTPUT ACCEPT | |
25 | ||
26 | # Empty LOG_DROP and LOG_REJECT chains | |
27 | /sbin/iptables -N LOG_DROP | |
28 | /sbin/iptables -A LOG_DROP -m limit --limit 10/minute -j LOG | |
29 | /sbin/iptables -A LOG_DROP -j DROP | |
30 | /sbin/iptables -N LOG_REJECT | |
31 | /sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG | |
32 | /sbin/iptables -A LOG_REJECT -j REJECT | |
33 | ||
34 | # This chain will log, then DROPs packets with certain bad combinations | |
35 | # of flags might indicate a port-scan attempt (xmas, null, etc) | |
36 | /sbin/iptables -N PSCAN | |
37 | if [ "$DROPPORTSCAN" == "on" ]; then | |
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" | |
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" | |
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" | |
42 | fi | |
43 | /sbin/iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan" | |
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 | |
48 | if [ "$DROPNEWNOTSYN" == "on" ]; then | |
49 | /sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN " | |
50 | fi | |
51 | /sbin/iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN" | |
52 | ||
53 | # Chain to contain all the rules relating to bad TCP flags | |
54 | /sbin/iptables -N BADTCP | |
55 | ||
56 | #Don't check loopback | |
57 | /sbin/iptables -A BADTCP -i lo -j RETURN | |
58 | ||
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 | # Fix for braindead ISP's | |
77 | /sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu | |
78 | ||
79 | # CUSTOM chains, can be used by the users themselves | |
80 | /sbin/iptables -N CUSTOMINPUT | |
81 | /sbin/iptables -A INPUT -j CUSTOMINPUT | |
82 | /sbin/iptables -N GUARDIAN | |
83 | /sbin/iptables -A INPUT -j GUARDIAN | |
84 | /sbin/iptables -N OVPNBLOCK | |
85 | /sbin/iptables -A FORWARD -j OVPNBLOCK | |
86 | /sbin/iptables -A FORWARD -j GUARDIAN | |
87 | /sbin/iptables -N CUSTOMFORWARD | |
88 | /sbin/iptables -A FORWARD -j CUSTOMFORWARD | |
89 | /sbin/iptables -N CUSTOMOUTPUT | |
90 | /sbin/iptables -A OUTPUT -j OVPNBLOCK | |
91 | /sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT | |
92 | /sbin/iptables -A OUTPUT -j CUSTOMOUTPUT | |
93 | /sbin/iptables -N OUTGOINGFW | |
94 | /sbin/iptables -A OUTPUT -j OUTGOINGFW | |
95 | /sbin/iptables -t nat -N CUSTOMPREROUTING | |
96 | /sbin/iptables -t nat -N OVPNNAT | |
97 | /sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING | |
98 | /sbin/iptables -t nat -N CUSTOMPOSTROUTING | |
99 | /sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING | |
100 | /sbin/iptables -t nat -A POSTROUTING -j OVPNNAT | |
101 | ||
102 | # IPTV chains for IGMPPROXY | |
103 | /sbin/iptables -N IPTVINPUT | |
104 | /sbin/iptables -A INPUT -j IPTVINPUT | |
105 | /sbin/iptables -N IPTVFORWARD | |
106 | /sbin/iptables -A FORWARD -j IPTVFORWARD | |
107 | ||
108 | # Filtering ovpn networks INPUT | |
109 | /sbin/iptables -A INPUT -j OVPNBLOCK | |
110 | ||
111 | # filtering from GUI | |
112 | /sbin/iptables -N GUIINPUT | |
113 | /sbin/iptables -A INPUT -j GUIINPUT | |
114 | /sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT | |
115 | ||
116 | # Accept everything connected | |
117 | /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT | |
118 | /sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT | |
119 | ||
120 | # Accept everything on lo | |
121 | iptables -A INPUT -i lo -m state --state NEW -j ACCEPT | |
122 | iptables -A OUTPUT -o lo -m state --state NEW -j ACCEPT | |
123 | ||
124 | # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything | |
125 | /sbin/iptables -N IPSECINPUT | |
126 | /sbin/iptables -N IPSECFORWARD | |
127 | /sbin/iptables -N IPSECOUTPUT | |
128 | /sbin/iptables -N OPENSSLVIRTUAL | |
129 | /sbin/iptables -A INPUT -j IPSECINPUT | |
130 | /sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT" | |
131 | /sbin/iptables -A FORWARD -j IPSECFORWARD | |
132 | /sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD" | |
133 | /sbin/iptables -A OUTPUT -j IPSECOUTPUT | |
134 | /sbin/iptables -t nat -N IPSECNAT | |
135 | /sbin/iptables -t nat -A POSTROUTING -j IPSECNAT | |
136 | ||
137 | # Input Firewall | |
138 | /sbin/iptables -N INPUTFW | |
139 | /sbin/iptables -A INPUT -m state --state NEW -j INPUTFW | |
140 | ||
141 | # localhost and ethernet. | |
142 | /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT | |
143 | /sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo | |
144 | /sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP | |
145 | /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT | |
146 | /sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP | |
147 | /sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP | |
148 | /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT ! -p icmp | |
149 | ||
150 | # allow DHCP on BLUE to be turned on/off | |
151 | /sbin/iptables -N DHCPBLUEINPUT | |
152 | /sbin/iptables -A INPUT -j DHCPBLUEINPUT | |
153 | ||
154 | # WIRELESS chains | |
155 | /sbin/iptables -N WIRELESSINPUT | |
156 | /sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT | |
157 | /sbin/iptables -N WIRELESSFORWARD | |
158 | /sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD | |
159 | ||
160 | # Forward Firewall | |
161 | /sbin/iptables -N FORWARDFW | |
162 | /sbin/iptables -A FORWARD -j FORWARDFW | |
163 | ||
164 | # OPenSSL | |
165 | /sbin/iptables -N OPENSSLPHYSICAL | |
166 | /sbin/iptables -A INPUT -j OPENSSLPHYSICAL | |
167 | ||
168 | # RED chain, used for the red interface | |
169 | /sbin/iptables -N REDINPUT | |
170 | /sbin/iptables -A INPUT -j REDINPUT | |
171 | /sbin/iptables -N REDFORWARD | |
172 | /sbin/iptables -A FORWARD -j REDFORWARD | |
173 | /sbin/iptables -t nat -N REDNAT | |
174 | /sbin/iptables -t nat -A POSTROUTING -j REDNAT | |
175 | ||
176 | iptables_red | |
177 | ||
178 | # Custom prerouting chains (for transparent proxy and port forwarding) | |
179 | /sbin/iptables -t nat -N SQUID | |
180 | /sbin/iptables -t nat -A PREROUTING -j SQUID | |
181 | /sbin/iptables -t nat -N NAT_DESTINATION | |
182 | /sbin/iptables -t nat -N NAT_SOURCE | |
183 | /sbin/iptables -t nat -A PREROUTING -j NAT_DESTINATION | |
184 | /sbin/iptables -t nat -I POSTROUTING 3 -j NAT_SOURCE | |
185 | ||
186 | ||
187 | ||
188 | # upnp chain for our upnp daemon | |
189 | /sbin/iptables -t nat -N UPNPFW | |
190 | /sbin/iptables -t nat -A PREROUTING -j UPNPFW | |
191 | /sbin/iptables -N UPNPFW | |
192 | /sbin/iptables -A FORWARD -m state --state NEW -j UPNPFW | |
193 | ||
194 | # Postrouting rules (for port forwarding) | |
195 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT --to-source $GREEN_ADDRESS | |
196 | if [ "$BLUE_DEV" != "" ]; then | |
197 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS | |
198 | fi | |
199 | if [ "$ORANGE_DEV" != "" ]; then | |
200 | /sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS | |
201 | fi | |
202 | ||
203 | # run local firewall configuration, if present | |
204 | if [ -x /etc/sysconfig/firewall.local ]; then | |
205 | /etc/sysconfig/firewall.local start | |
206 | fi | |
207 | ||
208 | # run openvpn | |
209 | /usr/local/bin/openvpnctrl --create-chains-and-rules | |
210 | ||
211 | # run wirelessctrl | |
212 | /usr/local/bin/wirelessctrl | |
213 | ||
214 | #POLICY CHAIN | |
215 | /sbin/iptables -N POLICYIN | |
216 | /sbin/iptables -A INPUT -j POLICYIN | |
217 | /sbin/iptables -N POLICYFWD | |
218 | /sbin/iptables -A FORWARD -j POLICYFWD | |
219 | /sbin/iptables -N POLICYOUT | |
220 | /sbin/iptables -A OUTPUT -j POLICYOUT | |
221 | ||
222 | /usr/sbin/firewall-policy | |
223 | ||
224 | # read new firewall | |
225 | /usr/local/bin/forwardfwctrl | |
226 | ||
227 | if [ "$DROPINPUT" == "on" ]; then | |
228 | /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT" | |
229 | fi | |
230 | /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT" | |
231 | if [ "$DROPFORWARD" == "on" ]; then | |
232 | /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD" | |
233 | fi | |
234 | /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_FORWARD" | |
235 | } | |
236 | ||
237 | iptables_red() { | |
238 | /sbin/iptables -F REDINPUT | |
239 | /sbin/iptables -F REDFORWARD | |
240 | /sbin/iptables -t nat -F REDNAT | |
241 | ||
242 | # PPPoE / PPTP Device | |
243 | if [ "$IFACE" != "" ]; then | |
244 | # PPPoE / PPTP | |
245 | if [ "$DEVICE" != "" ]; then | |
246 | /sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT | |
247 | fi | |
248 | if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then | |
249 | if [ "$RED_DEV" != "" ]; then | |
250 | /sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT | |
251 | fi | |
252 | fi | |
253 | fi | |
254 | ||
255 | # PPTP over DHCP | |
256 | if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then | |
257 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT | |
258 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT | |
259 | fi | |
260 | ||
261 | # Orange pinholes | |
262 | if [ "$ORANGE_DEV" != "" ]; then | |
263 | # This rule enables a host on ORANGE network to connect to the outside | |
264 | # (only if we have a red connection) | |
265 | if [ "$IFACE" != "" ]; then | |
266 | /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT | |
267 | fi | |
268 | fi | |
269 | ||
270 | if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then | |
271 | # DHCP | |
272 | if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then | |
273 | /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
274 | /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT | |
275 | fi | |
276 | if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; 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 | ||
281 | # Outgoing masquerading (don't masqerade IPSEC (mark 50)) | |
282 | /sbin/iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN | |
283 | /sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE | |
284 | ||
285 | fi | |
286 | } | |
287 | ||
288 | # See how we were called. | |
289 | case "$1" in | |
290 | start) | |
291 | iptables_init | |
292 | ;; | |
293 | reload) | |
294 | iptables_red | |
295 | # run local firewall configuration, if present | |
296 | if [ -x /etc/sysconfig/firewall.local ]; then | |
297 | /etc/sysconfig/firewall.local reload | |
298 | fi | |
299 | ;; | |
300 | restart) | |
301 | # run local firewall configuration, if present | |
302 | if [ -x /etc/sysconfig/firewall.local ]; then | |
303 | /etc/sysconfig/firewall.local stop | |
304 | fi | |
305 | $0 start | |
306 | ;; | |
307 | *) | |
308 | echo "Usage: $0 {start|reload|restart}" | |
309 | exit 1 | |
310 | ;; | |
311 | esac | |
312 | ||
313 | exit 0 |