]>
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 GUARDIAN
87 /sbin
/iptables
-A INPUT
-j GUARDIAN
88 /sbin
/iptables
-N OVPNBLOCK
89 /sbin
/iptables
-A FORWARD
-j OVPNBLOCK
90 /sbin
/iptables
-A FORWARD
-j GUARDIAN
91 /sbin
/iptables
-N CUSTOMFORWARD
92 /sbin
/iptables
-A FORWARD
-j CUSTOMFORWARD
93 /sbin
/iptables
-N CUSTOMOUTPUT
94 /sbin
/iptables
-A OUTPUT
-j OVPNBLOCK
95 /sbin
/iptables
-A OUTPUT
-j CUSTOMOUTPUT
96 /sbin
/iptables
-N OUTGOINGFW
97 /sbin
/iptables
-A OUTPUT
-j OUTGOINGFW
98 /sbin
/iptables
-t nat
-N CUSTOMPREROUTING
99 /sbin
/iptables
-t nat
-N OVPNNAT
100 /sbin
/iptables
-t nat
-A PREROUTING
-j CUSTOMPREROUTING
101 /sbin
/iptables
-t nat
-N CUSTOMPOSTROUTING
102 /sbin
/iptables
-t nat
-A POSTROUTING
-j CUSTOMPOSTROUTING
103 /sbin
/iptables
-t nat
-A POSTROUTING
-j OVPNNAT
105 # IPTV chains for IGMPPROXY
106 /sbin
/iptables
-N IPTVINPUT
107 /sbin
/iptables
-A INPUT
-j IPTVINPUT
108 /sbin
/iptables
-N IPTVFORWARD
109 /sbin
/iptables
-A FORWARD
-j IPTVFORWARD
111 # Filtering ovpn networks INPUT
112 /sbin
/iptables
-A INPUT
-j OVPNBLOCK
115 /sbin
/iptables
-N GUIINPUT
116 /sbin
/iptables
-A INPUT
-j GUIINPUT
117 /sbin
/iptables
-A GUIINPUT
-p icmp
--icmp-type 8 -j ACCEPT
119 # Accept everything on loopback
120 /sbin
/iptables
-N LOOPBACK
121 /sbin
/iptables
-A LOOPBACK
-i lo
-j ACCEPT
122 /sbin
/iptables
-A LOOPBACK
-o lo
-j ACCEPT
124 # Filter all packets with loopback addresses on non-loopback interfaces.
125 /sbin
/iptables
-A LOOPBACK
-s 127.0.0.0/8 -j DROP
126 /sbin
/iptables
-A LOOPBACK
-d 127.0.0.0/8 -j DROP
128 for i
in INPUT FORWARD OUTPUT
; do
129 /sbin
/iptables
-A ${i} -j LOOPBACK
132 # Accept everything connected
133 for i
in INPUT FORWARD OUTPUT
; do
134 /sbin
/iptables
-A ${i} -j CONNTRACK
137 # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
138 /sbin
/iptables
-N IPSECINPUT
139 /sbin
/iptables
-N IPSECFORWARD
140 /sbin
/iptables
-N IPSECOUTPUT
141 /sbin
/iptables
-N OPENSSLVIRTUAL
142 /sbin
/iptables
-A INPUT
-j IPSECINPUT
143 /sbin
/iptables
-A INPUT
-j OPENSSLVIRTUAL
-m comment
--comment "OPENSSLVIRTUAL INPUT"
144 /sbin
/iptables
-A FORWARD
-j IPSECFORWARD
145 /sbin
/iptables
-A FORWARD
-j OPENSSLVIRTUAL
-m comment
--comment "OPENSSLVIRTUAL FORWARD"
146 /sbin
/iptables
-A OUTPUT
-j IPSECOUTPUT
147 /sbin
/iptables
-t nat
-N IPSECNAT
148 /sbin
/iptables
-t nat
-A POSTROUTING
-j IPSECNAT
151 /sbin
/iptables
-N INPUTFW
152 /sbin
/iptables
-A INPUT
-m conntrack
--ctstate NEW
-j INPUTFW
154 # localhost and ethernet.
155 /sbin
/iptables
-A INPUT
-i $GREEN_DEV -m conntrack
--ctstate NEW
-j ACCEPT
! -p icmp
157 # allow DHCP on BLUE to be turned on/off
158 /sbin
/iptables
-N DHCPBLUEINPUT
159 /sbin
/iptables
-A INPUT
-j DHCPBLUEINPUT
162 /sbin
/iptables
-N WIRELESSINPUT
163 /sbin
/iptables
-A INPUT
-m conntrack
--ctstate NEW
-j WIRELESSINPUT
164 /sbin
/iptables
-N WIRELESSFORWARD
165 /sbin
/iptables
-A FORWARD
-m conntrack
--ctstate NEW
-j WIRELESSFORWARD
168 /sbin
/iptables
-N FORWARDFW
169 /sbin
/iptables
-A FORWARD
-j FORWARDFW
172 /sbin
/iptables
-N OPENSSLPHYSICAL
173 /sbin
/iptables
-A INPUT
-j OPENSSLPHYSICAL
175 # RED chain, used for the red interface
176 /sbin
/iptables
-N REDINPUT
177 /sbin
/iptables
-A INPUT
-j REDINPUT
178 /sbin
/iptables
-N REDFORWARD
179 /sbin
/iptables
-A FORWARD
-j REDFORWARD
180 /sbin
/iptables
-t nat
-N REDNAT
181 /sbin
/iptables
-t nat
-A POSTROUTING
-j REDNAT
185 # Custom prerouting chains (for transparent proxy and port forwarding)
186 /sbin
/iptables
-t nat
-N SQUID
187 /sbin
/iptables
-t nat
-A PREROUTING
-j SQUID
188 /sbin
/iptables
-t nat
-N NAT_DESTINATION
189 /sbin
/iptables
-t nat
-N NAT_SOURCE
190 /sbin
/iptables
-t nat
-A PREROUTING
-j NAT_DESTINATION
191 /sbin
/iptables
-t nat
-I POSTROUTING
3 -j NAT_SOURCE
195 # upnp chain for our upnp daemon
196 /sbin
/iptables
-t nat
-N UPNPFW
197 /sbin
/iptables
-t nat
-A PREROUTING
-j UPNPFW
198 /sbin
/iptables
-N UPNPFW
199 /sbin
/iptables
-A FORWARD
-m conntrack
--ctstate NEW
-j UPNPFW
201 # Postrouting rules (for port forwarding)
202 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 1 -j SNAT
--to-source $GREEN_ADDRESS
203 if [ "$BLUE_DEV" != "" ]; then
204 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 2 -j SNAT
--to-source $BLUE_ADDRESS
206 if [ "$ORANGE_DEV" != "" ]; then
207 /sbin
/iptables
-t nat
-A POSTROUTING
-m mark
--mark 3 -j SNAT
--to-source $ORANGE_ADDRESS
210 # run local firewall configuration, if present
211 if [ -x /etc
/sysconfig
/firewall.
local ]; then
212 /etc
/sysconfig
/firewall.
local start
216 /usr
/local
/bin
/openvpnctrl
--create-chains-and-rules
219 /usr
/local
/bin
/wirelessctrl
222 /sbin
/iptables
-N POLICYIN
223 /sbin
/iptables
-A INPUT
-j POLICYIN
224 /sbin
/iptables
-N POLICYFWD
225 /sbin
/iptables
-A FORWARD
-j POLICYFWD
226 /sbin
/iptables
-N POLICYOUT
227 /sbin
/iptables
-A OUTPUT
-j POLICYOUT
229 /usr
/sbin
/firewall-policy
232 /usr
/local
/bin
/forwardfwctrl
234 if [ "$DROPINPUT" == "on" ]; then
235 /sbin
/iptables
-A INPUT
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_INPUT"
237 /sbin
/iptables
-A INPUT
-j DROP
-m comment
--comment "DROP_INPUT"
238 if [ "$DROPFORWARD" == "on" ]; then
239 /sbin
/iptables
-A FORWARD
-m limit
--limit 10/minute
-j LOG
--log-prefix "DROP_FORWARD"
241 /sbin
/iptables
-A FORWARD
-j DROP
-m comment
--comment "DROP_FORWARD"
245 /sbin
/iptables
-F REDINPUT
246 /sbin
/iptables
-F REDFORWARD
247 /sbin
/iptables
-t nat
-F REDNAT
249 # PPPoE / PPTP Device
250 if [ "$IFACE" != "" ]; then
252 if [ "$DEVICE" != "" ]; then
253 /sbin
/iptables
-A REDINPUT
-i $DEVICE -j ACCEPT
255 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
256 if [ "$RED_DEV" != "" ]; then
257 /sbin
/iptables
-A REDINPUT
-i $RED_DEV -j ACCEPT
263 if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
264 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
265 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
269 if [ "$ORANGE_DEV" != "" ]; then
270 # This rule enables a host on ORANGE network to connect to the outside
271 # (only if we have a red connection)
272 if [ "$IFACE" != "" ]; then
273 /sbin
/iptables
-A REDFORWARD
-i $ORANGE_DEV -o $IFACE -j ACCEPT
277 if [ "$IFACE" != "" -a -f /var
/ipfire
/red
/active
]; then
279 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
280 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
281 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
283 if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
284 /sbin
/iptables
-A REDINPUT
-p tcp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
285 /sbin
/iptables
-A REDINPUT
-p udp
--source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
288 # Outgoing masquerading (don't masqerade IPSEC (mark 50))
289 /sbin
/iptables
-t nat
-A REDNAT
-m mark
--mark 50 -o $IFACE -j RETURN
290 /sbin
/iptables
-t nat
-A REDNAT
-o $IFACE -j MASQUERADE
295 # See how we were called.
302 # run local firewall configuration, if present
303 if [ -x /etc
/sysconfig
/firewall.
local ]; then
304 /etc
/sysconfig
/firewall.
local reload
308 # run local firewall configuration, if present
309 if [ -x /etc
/sysconfig
/firewall.
local ]; then
310 /etc
/sysconfig
/firewall.
local stop
315 echo "Usage: $0 {start|reload|restart}"