]>
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 conntrack
--ctstate NEW
-j NEWNOTSYN
73 /sbin
/iptables
-A INPUT
-p tcp
-j BADTCP
74 /sbin
/iptables
-A FORWARD
-p tcp
-j BADTCP
76 # Connection tracking chain
77 /sbin
/iptables
-N CONNTRACK
78 /sbin
/iptables
-A CONNTRACK
-m conntrack
--ctstate ESTABLISHED
,RELATED
-j ACCEPT
80 # Fix for braindead ISP's
81 /sbin
/iptables
-A FORWARD
-p tcp
--tcp-flags SYN
,RST SYN
-j TCPMSS
--clamp-mss-to-pmtu
83 # CUSTOM chains, can be used by the users themselves
84 /sbin
/iptables
-N CUSTOMINPUT
85 /sbin
/iptables
-A INPUT
-j CUSTOMINPUT
86 /sbin
/iptables
-N CUSTOMFORWARD
87 /sbin
/iptables
-A FORWARD
-j CUSTOMFORWARD
88 /sbin
/iptables
-N CUSTOMOUTPUT
89 /sbin
/iptables
-A OUTPUT
-j CUSTOMOUTPUT
90 /sbin
/iptables
-t nat
-N CUSTOMPREROUTING
91 /sbin
/iptables
-t nat
-A PREROUTING
-j CUSTOMPREROUTING
92 /sbin
/iptables
-t nat
-N CUSTOMPOSTROUTING
93 /sbin
/iptables
-t nat
-A POSTROUTING
-j CUSTOMPOSTROUTING
95 # Guardian (IPS) chains
96 /sbin
/iptables
-N GUARDIAN
97 /sbin
/iptables
-A INPUT
-j GUARDIAN
98 /sbin
/iptables
-A FORWARD
-j GUARDIAN
100 # Block OpenVPN transfer networks
101 /sbin
/iptables
-N OVPNBLOCK
102 for i
in INPUT FORWARD OUTPUT
; do
103 /sbin
/iptables
-A ${i} -j OVPNBLOCK
106 # OpenVPN transfer network translation
107 /sbin
/iptables
-t nat
-N OVPNNAT
108 /sbin
/iptables
-t nat
-A POSTROUTING
-j OVPNNAT
110 # IPTV chains for IGMPPROXY
111 /sbin
/iptables
-N IPTVINPUT
112 /sbin
/iptables
-A INPUT
-j IPTVINPUT
113 /sbin
/iptables
-N IPTVFORWARD
114 /sbin
/iptables
-A FORWARD
-j IPTVFORWARD
117 /sbin
/iptables
-N GUIINPUT
118 /sbin
/iptables
-A INPUT
-j GUIINPUT
119 /sbin
/iptables
-A GUIINPUT
-p icmp
--icmp-type 8 -j ACCEPT
121 # Accept everything on loopback
122 /sbin
/iptables
-N LOOPBACK
123 /sbin
/iptables
-A LOOPBACK
-i lo
-j ACCEPT
124 /sbin
/iptables
-A LOOPBACK
-o lo
-j ACCEPT
126 # Filter all packets with loopback addresses on non-loopback interfaces.
127 /sbin
/iptables
-A LOOPBACK
-s 127.0.0.0/8 -j DROP
128 /sbin
/iptables
-A LOOPBACK
-d 127.0.0.0/8 -j DROP
130 for i
in INPUT FORWARD OUTPUT
; do
131 /sbin
/iptables
-A ${i} -j LOOPBACK
134 # Accept everything connected
135 for i
in INPUT FORWARD OUTPUT
; do
136 /sbin
/iptables
-A ${i} -j CONNTRACK
139 # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
140 /sbin
/iptables
-N IPSECINPUT
141 /sbin
/iptables
-N IPSECFORWARD
142 /sbin
/iptables
-N IPSECOUTPUT
143 /sbin
/iptables
-A INPUT
-j IPSECINPUT
144 /sbin
/iptables
-A FORWARD
-j IPSECFORWARD
145 /sbin
/iptables
-A OUTPUT
-j IPSECOUTPUT
146 /sbin
/iptables
-t nat
-N IPSECNAT
147 /sbin
/iptables
-t nat
-A POSTROUTING
-j IPSECNAT
149 # localhost and ethernet.
150 /sbin
/iptables
-A INPUT
-i $GREEN_DEV -m conntrack
--ctstate NEW
-j ACCEPT
! -p icmp
152 # allow DHCP on BLUE to be turned on/off
153 /sbin
/iptables
-N DHCPBLUEINPUT
154 /sbin
/iptables
-A INPUT
-j DHCPBLUEINPUT
157 /sbin
/iptables
-N WIRELESSINPUT
158 /sbin
/iptables
-A INPUT
-m conntrack
--ctstate NEW
-j WIRELESSINPUT
159 /sbin
/iptables
-N WIRELESSFORWARD
160 /sbin
/iptables
-A FORWARD
-m conntrack
--ctstate NEW
-j WIRELESSFORWARD
162 # Jump into the actual firewall ruleset.
163 /sbin
/iptables
-N INPUTFW
164 /sbin
/iptables
-A INPUT
-j INPUTFW
166 /sbin
/iptables
-N OUTGOINGFW
167 /sbin
/iptables
-A OUTPUT
-j OUTGOINGFW
169 /sbin
/iptables
-N FORWARDFW
170 /sbin
/iptables
-A FORWARD
-j FORWARDFW
172 # RED chain, used for the red interface
173 /sbin
/iptables
-N REDINPUT
174 /sbin
/iptables
-A INPUT
-j REDINPUT
175 /sbin
/iptables
-N REDFORWARD
176 /sbin
/iptables
-A FORWARD
-j REDFORWARD
177 /sbin
/iptables
-t nat
-N REDNAT
178 /sbin
/iptables
-t nat
-A POSTROUTING
-j REDNAT
182 # Custom prerouting chains (for transparent proxy)
183 /sbin
/iptables
-t nat
-N SQUID
184 /sbin
/iptables
-t nat
-A PREROUTING
-j SQUID
187 /sbin
/iptables
-t nat
-N NAT_DESTINATION
188 /sbin
/iptables
-t nat
-A PREROUTING
-j NAT_DESTINATION
191 /sbin
/iptables
-t nat
-N NAT_SOURCE
192 /sbin
/iptables
-t nat
-A POSTROUTING
-j NAT_SOURCE
194 # upnp chain for our upnp daemon
195 /sbin
/iptables
-t nat
-N UPNPFW
196 /sbin
/iptables
-t nat
-A PREROUTING
-j UPNPFW
197 /sbin
/iptables
-N UPNPFW
198 /sbin
/iptables
-A FORWARD
-m conntrack
--ctstate NEW
-j UPNPFW
200 # run local firewall configuration, if present
201 if [ -x /etc
/sysconfig
/firewall.
local ]; then
202 /etc
/sysconfig
/firewall.
local start
206 /usr
/local
/bin
/openvpnctrl
--create-chains-and-rules
209 /usr
/local
/bin
/wirelessctrl
212 /sbin
/iptables
-N POLICYIN
213 /sbin
/iptables
-A INPUT
-j POLICYIN
214 /sbin
/iptables
-N POLICYFWD
215 /sbin
/iptables
-A FORWARD
-j POLICYFWD
216 /sbin
/iptables
-N POLICYOUT
217 /sbin
/iptables
-A OUTPUT
-j POLICYOUT
219 /usr
/sbin
/firewall-policy
222 /usr
/local
/bin
/forwardfwctrl
224 if [ "$DROPINPUT" == "on" ]; then
225 /sbin
/iptables
-A INPUT
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_INPUT"
227 /sbin
/iptables
-A INPUT
-j DROP
-m comment
--comment "DROP_INPUT"
228 if [ "$DROPFORWARD" == "on" ]; then
229 /sbin
/iptables
-A FORWARD
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_FORWARD"
231 /sbin
/iptables
-A FORWARD
-j DROP
-m comment
--comment "DROP_FORWARD"
235 /sbin
/iptables
-F REDINPUT
236 /sbin
/iptables
-F REDFORWARD
237 /sbin
/iptables
-t nat
-F REDNAT
239 # PPPoE / PPTP Device
240 if [ "$IFACE" != "" ]; then
242 if [ "$DEVICE" != "" ]; then
243 /sbin
/iptables
-A REDINPUT
-i $DEVICE -j ACCEPT
245 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
246 if [ "$RED_DEV" != "" ]; then
247 /sbin
/iptables
-A REDINPUT
-i $RED_DEV -j ACCEPT
253 if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
254 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
255 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
259 if [ "$ORANGE_DEV" != "" ]; then
260 # This rule enables a host on ORANGE network to connect to the outside
261 # (only if we have a red connection)
262 if [ "$IFACE" != "" ]; then
263 /sbin
/iptables
-A REDFORWARD
-i $ORANGE_DEV -o $IFACE -j ACCEPT
267 if [ "$IFACE" != "" -a -f /var
/ipfire
/red
/active
]; then
269 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
270 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
271 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
273 if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
274 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
275 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
278 # Outgoing masquerading (don't masqerade IPSEC (mark 50))
279 /sbin
/iptables
-t nat
-A REDNAT
-m mark
--mark 50 -o $IFACE -j RETURN
280 /sbin
/iptables
-t nat
-A REDNAT
-o $IFACE -j MASQUERADE
285 # See how we were called.
292 # run local firewall configuration, if present
293 if [ -x /etc
/sysconfig
/firewall.
local ]; then
294 /etc
/sysconfig
/firewall.
local reload
298 # run local firewall configuration, if present
299 if [ -x /etc
/sysconfig
/firewall.
local ]; then
300 /etc
/sysconfig
/firewall.
local stop
305 echo "Usage: $0 {start|reload|restart}"