]>
git.ipfire.org Git - ipfire-2.x.git/blob - src/initscripts/init.d/firewall
0392e9f67d7509c8867b5b387486d940f16ddbba
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'`
8 if [ -f /var
/ipfire
/red
/device
]; then
9 DEVICE
=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
13 # Flush all rules and delete all custom chains
15 /sbin
/iptables
-t nat
-F
16 /sbin
/iptables
-t mangle
-F
18 /sbin
/iptables
-t nat
-X
19 /sbin
/iptables
-t mangle
-X
22 /sbin
/iptables
-P INPUT DROP
23 /sbin
/iptables
-P FORWARD DROP
24 /sbin
/iptables
-P OUTPUT ACCEPT
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
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 [ "$DROPPORTSCAN" == "on" ]; then
38 /sbin
/iptables
-A PSCAN
-p tcp
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_TCP Scan " -m comment
--comment "DROP_TCP PScan"
39 /sbin
/iptables
-A PSCAN
-p udp
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_UDP Scan " -m comment
--comment "DROP_UDP PScan"
40 /sbin
/iptables
-A PSCAN
-p icmp
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_ICMP Scan " -m comment
--comment "DROP_ICMP PScan"
41 /sbin
/iptables
-A PSCAN
-f -m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_FRAG Scan " -m comment
--comment "DROP_FRAG PScan"
43 /sbin
/iptables
-A PSCAN
-j DROP
-m comment
--comment "DROP_PScan"
45 # New tcp packets without SYN set - could well be an obscure type of port scan
46 # that's not covered above, may just be a broken windows machine
47 /sbin
/iptables
-N NEWNOTSYN
48 if [ "$DROPNEWNOTSYN" == "on" ]; then
49 /sbin
/iptables
-A NEWNOTSYN
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_NEWNOTSYN "
51 /sbin
/iptables
-A NEWNOTSYN
-j DROP
-m comment
--comment "DROP_NEWNOTSYN"
53 # Chain to contain all the rules relating to bad TCP flags
54 /sbin
/iptables
-N BADTCP
56 # Disallow packets frequently used by port-scanners
58 /sbin
/iptables
-A BADTCP
-p tcp
--tcp-flags ALL FIN
,URG
,PSH
-j PSCAN
60 /sbin
/iptables
-A BADTCP
-p tcp
--tcp-flags ALL NONE
-j PSCAN
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
68 /sbin
/iptables
-A BADTCP
-p tcp
! --syn -m state
--state NEW
-j NEWNOTSYN
70 /sbin
/iptables
-A INPUT
-j BADTCP
71 /sbin
/iptables
-A FORWARD
-j BADTCP
76 /sbin
/iptables
-F REDINPUT
77 /sbin
/iptables
-F REDFORWARD
78 /sbin
/iptables
-t nat
-F REDNAT
81 if [ "$IFACE" != "" ]; then
83 if [ "$DEVICE" != "" ]; then
84 /sbin
/iptables
-A REDINPUT
-i $DEVICE -j ACCEPT
86 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
87 if [ "$RED_DEV" != "" ]; then
88 /sbin
/iptables
-A REDINPUT
-i $RED_DEV -j ACCEPT
94 if [ "$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 $DEVICE -j ACCEPT
100 if [ "$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
104 /sbin
/iptables
-A REDFORWARD
-i $ORANGE_DEV -p tcp
-o $IFACE -j ACCEPT
105 /sbin
/iptables
-A REDFORWARD
-i $ORANGE_DEV -p udp
-o $IFACE -j ACCEPT
109 if [ "$IFACE" != "" -a -f /var
/ipfire
/red
/active
]; then
111 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
112 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
113 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
115 if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
116 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
117 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
120 # Outgoing masquerading
121 /sbin
/iptables
-t nat
-A REDNAT
-o $IFACE -j MASQUERADE
126 # See how we were called.
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...
135 #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit ! --limit 10/sec -j DROP
137 # Fix for braindead ISP's
138 /sbin
/iptables
-A FORWARD
-p tcp
--tcp-flags SYN
,RST SYN
-j TCPMSS
--clamp-mss-to-pmtu
140 # CUSTOM chains, can be used by the users themselves
141 /sbin
/iptables
-N CUSTOMINPUT
142 /sbin
/iptables
-A INPUT
-j CUSTOMINPUT
143 /sbin
/iptables
-N CUSTOMFORWARD
144 /sbin
/iptables
-A FORWARD
-j CUSTOMFORWARD
145 /sbin
/iptables
-N CUSTOMOUTPUT
146 /sbin
/iptables
-A OUTPUT
-j CUSTOMOUTPUT
147 /sbin
/iptables
-N OUTGOINGFW
148 /sbin
/iptables
-A OUTPUT
-j OUTGOINGFW
149 /sbin
/iptables
-t nat
-N CUSTOMPREROUTING
150 /sbin
/iptables
-t nat
-A PREROUTING
-j CUSTOMPREROUTING
151 /sbin
/iptables
-t nat
-N CUSTOMPOSTROUTING
152 /sbin
/iptables
-t nat
-A POSTROUTING
-j CUSTOMPOSTROUTING
154 # IPTV chains for IGMPPROXY
155 /sbin
/iptables
-N IPTVINPUT
156 /sbin
/iptables
-A INPUT
-j IPTVINPUT
157 /sbin
/iptables
-N IPTVFORWARD
158 /sbin
/iptables
-A FORWARD
-j IPTVFORWARD
161 /sbin
/iptables
-N GUIINPUT
162 /sbin
/iptables
-A INPUT
-j GUIINPUT
163 /sbin
/iptables
-A GUIINPUT
-p icmp
--icmp-type 8 -j ACCEPT
165 # Accept everything connected
166 /sbin
/iptables
-A INPUT
-m state
--state ESTABLISHED
,RELATED
-j ACCEPT
167 /sbin
/iptables
-A FORWARD
-m state
--state ESTABLISHED
,RELATED
-j ACCEPT
169 # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
170 /sbin
/iptables
-N IPSECVIRTUAL
171 /sbin
/iptables
-N OPENSSLVIRTUAL
172 /sbin
/iptables
-A INPUT
-j IPSECVIRTUAL
-m comment
--comment "IPSECVIRTUAL INPUT"
173 /sbin
/iptables
-A INPUT
-j OPENSSLVIRTUAL
-m comment
--comment "OPENSSLVIRTUAL INPUT"
174 /sbin
/iptables
-A FORWARD
-j IPSECVIRTUAL
-m comment
--comment "IPSECVIRTUAL FORWARD"
175 /sbin
/iptables
-A FORWARD
-j OPENSSLVIRTUAL
-m comment
--comment "OPENSSLVIRTUAL FORWARD"
176 /sbin
/iptables
-t nat
-N IPSECNAT
177 /sbin
/iptables
-t nat
-A POSTROUTING
-j IPSECNAT
180 /sbin
/iptables
-A FORWARD
-j OUTGOINGFW
182 # localhost and ethernet.
183 /sbin
/iptables
-A INPUT
-i lo
-m state
--state NEW
-j ACCEPT
184 /sbin
/iptables
-A INPUT
-s 127.0.0.0/8 -m state
--state NEW
-j DROP
# Loopback not on lo
185 /sbin
/iptables
-A INPUT
-d 127.0.0.0/8 -m state
--state NEW
-j DROP
186 /sbin
/iptables
-A FORWARD
-i lo
-m state
--state NEW
-j ACCEPT
187 /sbin
/iptables
-A FORWARD
-s 127.0.0.0/8 -m state
--state NEW
-j DROP
188 /sbin
/iptables
-A FORWARD
-d 127.0.0.0/8 -m state
--state NEW
-j DROP
189 /sbin
/iptables
-A INPUT
-i $GREEN_DEV -m state
--state NEW
-j ACCEPT
-p ! icmp
190 /sbin
/iptables
-A FORWARD
-i $GREEN_DEV -m state
--state NEW
-j ACCEPT
192 # If a host on orange tries to initiate a connection to IPFire's red IP and
193 # the connection gets DNATed back through a port forward to a server on orange
194 # we end up with orange -> orange traffic passing through IPFire
195 [ "$ORANGE_DEV" != "" ] && /sbin
/iptables
-A FORWARD
-i $ORANGE_DEV -o $ORANGE_DEV -m state
--state NEW
-j ACCEPT
197 # allow DHCP on BLUE to be turned on/off
198 /sbin
/iptables
-N DHCPBLUEINPUT
199 /sbin
/iptables
-A INPUT
-j DHCPBLUEINPUT
202 /sbin
/iptables
-N IPSECPHYSICAL
203 /sbin
/iptables
-A INPUT
-j IPSECPHYSICAL
206 /sbin
/iptables
-N OPENSSLPHYSICAL
207 /sbin
/iptables
-A INPUT
-j OPENSSLPHYSICAL
210 /sbin
/iptables
-N WIRELESSINPUT
211 /sbin
/iptables
-A INPUT
-m state
--state NEW
-j WIRELESSINPUT
212 /sbin
/iptables
-N WIRELESSFORWARD
213 /sbin
/iptables
-A FORWARD
-m state
--state NEW
-j WIRELESSFORWARD
215 # RED chain, used for the red interface
216 /sbin
/iptables
-N REDINPUT
217 /sbin
/iptables
-A INPUT
-j REDINPUT
218 /sbin
/iptables
-N REDFORWARD
219 /sbin
/iptables
-A FORWARD
-j REDFORWARD
220 /sbin
/iptables
-t nat
-N REDNAT
221 /sbin
/iptables
-t nat
-A POSTROUTING
-j REDNAT
225 # DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow
226 # ORANGE to talk to GREEN / BLUE.
227 /sbin
/iptables
-N DMZHOLES
228 if [ "$ORANGE_DEV" != "" ]; then
229 /sbin
/iptables
-A FORWARD
-i $ORANGE_DEV -m state
--state NEW
-j DMZHOLES
232 # XTACCESS chain, used for external access
233 /sbin
/iptables
-N XTACCESS
234 /sbin
/iptables
-A INPUT
-m state
--state NEW
-j XTACCESS
236 # PORTFWACCESS chain, used for portforwarding
237 /sbin
/iptables
-N PORTFWACCESS
238 /sbin
/iptables
-A FORWARD
-m state
--state NEW
-j PORTFWACCESS
240 # Custom prerouting chains (for transparent proxy and port forwarding)
241 /sbin
/iptables
-t nat
-N SQUID
242 /sbin
/iptables
-t nat
-A PREROUTING
-j SQUID
243 /sbin
/iptables
-t nat
-N PORTFW
244 /sbin
/iptables
-t nat
-A PREROUTING
-j PORTFW
246 # upnp chain for our upnp daemon
247 /sbin
/iptables
-t nat
-N UPNPFW
248 /sbin
/iptables
-t nat
-A PREROUTING
-j UPNPFW
251 # Custom mangle chain (for port fowarding)
252 /sbin
/iptables
-t mangle
-N PORTFWMANGLE
253 /sbin
/iptables
-t mangle
-A PREROUTING
-j PORTFWMANGLE
255 # Postrouting rules (for port forwarding)
256 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 1 -j SNAT \
257 --to-source $GREEN_ADDRESS
258 if [ "$BLUE_DEV" != "" ]; then
259 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 2 -j SNAT
--to-source $BLUE_ADDRESS
261 if [ "$ORANGE_DEV" != "" ]; then
262 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 3 -j SNAT
--to-source $ORANGE_ADDRESS
265 # run local firewall configuration, if present
266 if [ -x /etc
/sysconfig
/firewall.
local ]; then
267 /etc
/sysconfig
/firewall.
local start
270 # last rule in input and forward chain is for logging.
272 if [ "$DROPINPUT" == "on" ]; then
273 /sbin
/iptables
-A INPUT
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_INPUT "
275 /sbin
/iptables
-A INPUT
-j DROP
-m comment
--comment "DROP_INPUT"
276 if [ "$DROPOUTPUT" == "on" ]; then
277 /sbin
/iptables
-A FORWARD
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_OUTPUT "
279 /sbin
/iptables
-A FORWARD
-j DROP
-m comment
--comment "DROP_OUTPUT"
283 /usr
/local
/bin
/openvpnctrl
--create-chains-and-rules
287 # Accept everyting connected
288 /sbin
/iptables
-A INPUT
-m state
--state ESTABLISHED
,RELATED
-j ACCEPT
290 # localhost and ethernet.
291 /sbin
/iptables
-A INPUT
-i lo
-j ACCEPT
292 /sbin
/iptables
-A INPUT
-i $GREEN_DEV -m state
--state NEW
-j ACCEPT
294 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
295 /sbin
/iptables
-A INPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
296 /sbin
/iptables
-A INPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
298 if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
299 /sbin
/iptables
-A INPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
300 /sbin
/iptables
-A INPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
303 # run local firewall configuration, if present
304 if [ -x /etc
/sysconfig
/firewall.
local ]; then
305 /etc
/sysconfig
/firewall.
local stop
308 if [ "$DROPINPUT" == "on" ]; then
309 /sbin
/iptables
-A INPUT
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_INPUT "
311 /sbin
/iptables
-A INPUT
-j DROP
-m comment
--comment "DROP_INPUT"
312 if [ "$DROPOUTPUT" == "on" ]; then
313 /sbin
/iptables
-A FORWARD
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_OUTPUT "
315 /sbin
/iptables
-A FORWARD
-j DROP
-m comment
--comment "DROP_OUTPUT"
319 /usr
/local
/bin
/openvpnctrl
--delete-chains-and-rules
324 # run local firewall configuration, if present
325 if [ -x /etc
/sysconfig
/firewall.
local ]; then
326 /etc
/sysconfig
/firewall.
local reload
334 echo "Usage: $0 {start|stop|reload|restart}"