]>
git.ipfire.org Git - people/teissler/ipfire-2.x.git/blob - src/initscripts/init.d/firewall
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
57 /sbin
/iptables
-A BADTCP
-i lo
-j RETURN
59 # Disallow packets frequently used by port-scanners
61 /sbin
/iptables
-A BADTCP
-p tcp
--tcp-flags ALL FIN
,URG
,PSH
-j PSCAN
63 /sbin
/iptables
-A BADTCP
-p tcp
--tcp-flags ALL NONE
-j PSCAN
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
71 /sbin
/iptables
-A BADTCP
-p tcp
! --syn -m state
--state NEW
-j NEWNOTSYN
73 /sbin
/iptables
-A INPUT
-j BADTCP
74 /sbin
/iptables
-A FORWARD
-j BADTCP
79 /sbin
/iptables
-F REDINPUT
80 /sbin
/iptables
-F REDFORWARD
81 /sbin
/iptables
-t nat
-F REDNAT
84 if [ "$IFACE" != "" ]; then
86 if [ "$DEVICE" != "" ]; then
87 /sbin
/iptables
-A REDINPUT
-i $DEVICE -j ACCEPT
89 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
90 if [ "$RED_DEV" != "" ]; then
91 /sbin
/iptables
-A REDINPUT
-i $RED_DEV -j ACCEPT
97 if [ "$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 $DEVICE -j ACCEPT
103 if [ "$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
107 /sbin
/iptables
-A REDFORWARD
-i $ORANGE_DEV -o $IFACE -j ACCEPT
111 if [ "$IFACE" != "" -a -f /var
/ipfire
/red
/active
]; then
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 $IFACE -j ACCEPT
117 if [ "$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
122 # Outgoing masquerading (don't masqerade IPSEC (mark 50))
123 /sbin
/iptables
-t nat
-A REDNAT
-m mark
--mark 50 -o $IFACE -j RETURN
124 /sbin
/iptables
-t nat
-A REDNAT
-o $IFACE -j MASQUERADE
129 # See how we were called.
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...
138 #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN ! -m limit --limit 10/sec -j DROP
140 # Fix for braindead ISP's
141 /sbin
/iptables
-A FORWARD
-p tcp
--tcp-flags SYN
,RST SYN
-j TCPMSS
--clamp-mss-to-pmtu
143 # CUSTOM chains, can be used by the users themselves
144 /sbin
/iptables
-N CUSTOMINPUT
145 /sbin
/iptables
-A INPUT
-j CUSTOMINPUT
146 /sbin
/iptables
-N GUARDIAN
147 /sbin
/iptables
-A INPUT
-j GUARDIAN
148 /sbin
/iptables
-A FORWARD
-j GUARDIAN
149 /sbin
/iptables
-N CUSTOMFORWARD
150 /sbin
/iptables
-A FORWARD
-j CUSTOMFORWARD
151 /sbin
/iptables
-N CUSTOMOUTPUT
152 /sbin
/iptables
-A OUTPUT
-j CUSTOMOUTPUT
153 /sbin
/iptables
-N OUTGOINGFW
154 /sbin
/iptables
-N OUTGOINGFWMAC
155 /sbin
/iptables
-A OUTPUT
-j OUTGOINGFW
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
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
168 /sbin
/iptables
-N GUIINPUT
169 /sbin
/iptables
-A INPUT
-j GUIINPUT
170 /sbin
/iptables
-A GUIINPUT
-p icmp
--icmp-type 8 -j ACCEPT
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
176 # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
177 /sbin
/iptables
-N IPSECINPUT
178 /sbin
/iptables
-N IPSECFORWARD
179 /sbin
/iptables
-N IPSECOUTPUT
180 /sbin
/iptables
-N OPENSSLVIRTUAL
181 /sbin
/iptables
-A INPUT
-j IPSECINPUT
182 /sbin
/iptables
-A INPUT
-j OPENSSLVIRTUAL
-m comment
--comment "OPENSSLVIRTUAL INPUT"
183 /sbin
/iptables
-A FORWARD
-j IPSECFORWARD
184 /sbin
/iptables
-A FORWARD
-j OPENSSLVIRTUAL
-m comment
--comment "OPENSSLVIRTUAL FORWARD"
185 /sbin
/iptables
-A OUTPUT
-j IPSECOUTPUT
186 /sbin
/iptables
-t nat
-N OVPNNAT
187 /sbin
/iptables
-t nat
-N IPSECNAT
188 /sbin
/iptables
-t nat
-A POSTROUTING
-j OVPNNAT
189 /sbin
/iptables
-t nat
-A POSTROUTING
-j IPSECNAT
192 /sbin
/iptables
-N TOR_INPUT
193 /sbin
/iptables
-A INPUT
-j TOR_INPUT
196 /sbin
/iptables
-A FORWARD
-j OUTGOINGFWMAC
198 # localhost and ethernet.
199 /sbin
/iptables
-A INPUT
-i lo
-m state
--state NEW
-j ACCEPT
200 /sbin
/iptables
-A INPUT
-s 127.0.0.0/8 -m state
--state NEW
-j DROP
# Loopback not on lo
201 /sbin
/iptables
-A INPUT
-d 127.0.0.0/8 -m state
--state NEW
-j DROP
202 /sbin
/iptables
-A FORWARD
-i lo
-m state
--state NEW
-j ACCEPT
203 /sbin
/iptables
-A FORWARD
-s 127.0.0.0/8 -m state
--state NEW
-j DROP
204 /sbin
/iptables
-A FORWARD
-d 127.0.0.0/8 -m state
--state NEW
-j DROP
205 /sbin
/iptables
-A INPUT
-i $GREEN_DEV -m state
--state NEW
-j ACCEPT
! -p icmp
206 /sbin
/iptables
-A FORWARD
-i $GREEN_DEV -m state
--state NEW
-j ACCEPT
208 # If a host on orange tries to initiate a connection to IPFire's red IP and
209 # the connection gets DNATed back through a port forward to a server on orange
210 # we end up with orange -> orange traffic passing through IPFire
211 [ "$ORANGE_DEV" != "" ] && /sbin
/iptables
-A FORWARD
-i $ORANGE_DEV -o $ORANGE_DEV -m state
--state NEW
-j ACCEPT
213 # allow DHCP on BLUE to be turned on/off
214 /sbin
/iptables
-N DHCPBLUEINPUT
215 /sbin
/iptables
-A INPUT
-j DHCPBLUEINPUT
218 /sbin
/iptables
-N OPENSSLPHYSICAL
219 /sbin
/iptables
-A INPUT
-j OPENSSLPHYSICAL
222 /sbin
/iptables
-N WIRELESSINPUT
223 /sbin
/iptables
-A INPUT
-m state
--state NEW
-j WIRELESSINPUT
224 /sbin
/iptables
-N WIRELESSFORWARD
225 /sbin
/iptables
-A FORWARD
-m state
--state NEW
-j WIRELESSFORWARD
227 # RED chain, used for the red interface
228 /sbin
/iptables
-N REDINPUT
229 /sbin
/iptables
-A INPUT
-j REDINPUT
230 /sbin
/iptables
-N REDFORWARD
231 /sbin
/iptables
-A FORWARD
-j REDFORWARD
232 /sbin
/iptables
-t nat
-N REDNAT
233 /sbin
/iptables
-t nat
-A POSTROUTING
-j REDNAT
237 # DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow
238 # ORANGE to talk to GREEN / BLUE.
239 /sbin
/iptables
-N DMZHOLES
240 if [ "$ORANGE_DEV" != "" ]; then
241 /sbin
/iptables
-A FORWARD
-i $ORANGE_DEV -m state
--state NEW
-j DMZHOLES
244 # XTACCESS chain, used for external access
245 /sbin
/iptables
-N XTACCESS
246 /sbin
/iptables
-A INPUT
-m state
--state NEW
-j XTACCESS
248 # PORTFWACCESS chain, used for portforwarding
249 /sbin
/iptables
-N PORTFWACCESS
250 /sbin
/iptables
-A FORWARD
-m state
--state NEW
-j PORTFWACCESS
252 # Custom prerouting chains (for transparent proxy and port forwarding)
253 /sbin
/iptables
-t nat
-N SQUID
254 /sbin
/iptables
-t nat
-A PREROUTING
-j SQUID
255 /sbin
/iptables
-t nat
-N PORTFW
256 /sbin
/iptables
-t nat
-A PREROUTING
-j PORTFW
258 # upnp chain for our upnp daemon
259 /sbin
/iptables
-t nat
-N UPNPFW
260 /sbin
/iptables
-t nat
-A PREROUTING
-j UPNPFW
261 /sbin
/iptables
-N UPNPFW
262 /sbin
/iptables
-A FORWARD
-m state
--state NEW
-j UPNPFW
264 # Custom mangle chain (for port fowarding)
265 /sbin
/iptables
-t mangle
-N PORTFWMANGLE
266 /sbin
/iptables
-t mangle
-A PREROUTING
-j PORTFWMANGLE
268 # Postrouting rules (for port forwarding)
269 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 1 -j SNAT \
270 --to-source $GREEN_ADDRESS
271 if [ "$BLUE_DEV" != "" ]; then
272 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 2 -j SNAT
--to-source $BLUE_ADDRESS
274 if [ "$ORANGE_DEV" != "" ]; then
275 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 3 -j SNAT
--to-source $ORANGE_ADDRESS
278 # run local firewall configuration, if present
279 if [ -x /etc
/sysconfig
/firewall.
local ]; then
280 /etc
/sysconfig
/firewall.
local start
283 # last rule in input and forward chain is for logging.
285 if [ "$DROPINPUT" == "on" ]; then
286 /sbin
/iptables
-A INPUT
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_INPUT "
288 /sbin
/iptables
-A INPUT
-j DROP
-m comment
--comment "DROP_INPUT"
289 if [ "$DROPOUTPUT" == "on" ]; then
290 /sbin
/iptables
-A FORWARD
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_OUTPUT "
292 /sbin
/iptables
-A FORWARD
-j DROP
-m comment
--comment "DROP_OUTPUT"
296 /usr
/local
/bin
/openvpnctrl
--create-chains-and-rules
300 # Accept everyting connected
301 /sbin
/iptables
-A INPUT
-m state
--state ESTABLISHED
,RELATED
-j ACCEPT
303 # localhost and ethernet.
304 /sbin
/iptables
-A INPUT
-i lo
-j ACCEPT
305 /sbin
/iptables
-A INPUT
-i $GREEN_DEV -m state
--state NEW
-j ACCEPT
307 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
308 /sbin
/iptables
-A INPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
309 /sbin
/iptables
-A INPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
311 if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
312 /sbin
/iptables
-A INPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
313 /sbin
/iptables
-A INPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
316 # run local firewall configuration, if present
317 if [ -x /etc
/sysconfig
/firewall.
local ]; then
318 /etc
/sysconfig
/firewall.
local stop
321 if [ "$DROPINPUT" == "on" ]; then
322 /sbin
/iptables
-A INPUT
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_INPUT "
324 /sbin
/iptables
-A INPUT
-j DROP
-m comment
--comment "DROP_INPUT"
325 if [ "$DROPOUTPUT" == "on" ]; then
326 /sbin
/iptables
-A FORWARD
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_OUTPUT "
328 /sbin
/iptables
-A FORWARD
-j DROP
-m comment
--comment "DROP_OUTPUT"
332 /usr
/local
/bin
/openvpnctrl
--delete-chains-and-rules
337 # run local firewall configuration, if present
338 if [ -x /etc
/sysconfig
/firewall.
local ]; then
339 /etc
/sysconfig
/firewall.
local reload
349 echo "Usage: $0 {start|stop|reload|restart}"