[people/pmueller/ipfire-2.x.git] / src / initscripts / init.d / firewall

#!/bin/sh

eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'`

if [ -f /var/ipfire/red/device ]; then
	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
fi

iptables_init() {
	# Flush all rules and delete all custom chains
	/sbin/iptables -F
	/sbin/iptables -t nat -F
	/sbin/iptables -t mangle -F
	/sbin/iptables -X
	/sbin/iptables -t nat -X
	/sbin/iptables -t mangle -X

	# Set up policies
	/sbin/iptables -P INPUT DROP
	/sbin/iptables -P FORWARD DROP
	/sbin/iptables -P OUTPUT ACCEPT

	# Empty LOG_DROP and LOG_REJECT chains
	/sbin/iptables -N LOG_DROP
	/sbin/iptables -A LOG_DROP   -m limit --limit 10/minute -j LOG
	/sbin/iptables -A LOG_DROP   -j DROP
	/sbin/iptables -N LOG_REJECT
	/sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	/sbin/iptables -A LOG_REJECT -j REJECT

	# This chain will log, then DROPs packets with certain bad combinations
	# of flags might indicate a port-scan attempt (xmas, null, etc)
	/sbin/iptables -N PSCAN
	/sbin/iptables -A PSCAN -p tcp  -m limit --limit 10/minute -j LOG --log-prefix "TCP Scan? "
	/sbin/iptables -A PSCAN -p udp  -m limit --limit 10/minute -j LOG --log-prefix "UDP Scan? "
	/sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "ICMP Scan? "
	/sbin/iptables -A PSCAN -f      -m limit --limit 10/minute -j LOG --log-prefix "FRAG Scan? "
	/sbin/iptables -A PSCAN -j DROP

	# New tcp packets without SYN set - could well be an obscure type of port scan
	# that's not covered above, may just be a broken windows machine
	/sbin/iptables -N NEWNOTSYN
	/sbin/iptables -A NEWNOTSYN  -m limit --limit 10/minute -j LOG  --log-prefix "NEW not SYN? "
	/sbin/iptables -A NEWNOTSYN  -j DROP

	# Chain to contain all the rules relating to bad TCP flags
	/sbin/iptables -N BADTCP

	# Disallow packets frequently used by port-scanners
	# nmap xmas
	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH  -j PSCAN
	# Null
	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
	# FIN
	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
	# SYN/RST (also catches xmas variants that set SYN+RST+...)
	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
	# SYN/FIN (QueSO or nmap OS probe)
	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
	# NEW TCP without SYN
	/sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN

	/sbin/iptables -A INPUT   -j BADTCP
	/sbin/iptables -A FORWARD -j BADTCP

}

iptables_red() {
	/sbin/iptables -F REDINPUT
	/sbin/iptables -F REDFORWARD
	/sbin/iptables -t nat -F REDNAT

	# PPPoE / PPTP Device
	if [ "$IFACE" != "" ]; then
		# PPPoE / PPTP
		if [ "$DEVICE" != "" ]; then
			/sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT
		fi
		if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
			if [ "$RED_DEV" != "" ]; then
				/sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT
			fi
		fi
	fi

	# PPTP over DHCP
	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
		/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
		/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
	fi

	# Orange pinholes
	if [ "$ORANGE_DEV" != "" ]; then
		# This rule enables a host on ORANGE network to connect to the outside
		# (only if we have a red connection)
		if [ "$IFACE" != "" ]; then
			/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p tcp -o $IFACE -j ACCEPT
			/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p udp -o $IFACE -j ACCEPT
		fi
	fi

	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
		# DHCP
		if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
			/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
			/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		fi
		if [ "$METHOD" == "DHCP"  -a "$PROTOCOL" == "RFC1483" ]; then
			/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
			/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		fi

		# Outgoing masquerading
		/sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE

	fi
}

# See how we were called.
case "$1" in
  start)
	iptables_init

	# Limit Packets- helps reduce dos/syn attacks
	# original do nothing line
	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec
	# the correct one, but the negative '!' do nothing...
	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit ! --limit 10/sec -j DROP

	# Fix for braindead ISP's
	/sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

	# CUSTOM chains, can be used by the users themselves
	/sbin/iptables -N CUSTOMINPUT
	/sbin/iptables -A INPUT -j CUSTOMINPUT
	/sbin/iptables -N CUSTOMFORWARD
	/sbin/iptables -A FORWARD -j CUSTOMFORWARD
	/sbin/iptables -N CUSTOMOUTPUT
	/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
	/sbin/iptables -t nat -N CUSTOMPREROUTING
	/sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	/sbin/iptables -t nat -N CUSTOMPOSTROUTING
	/sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING

	# filtering from GUI
	/sbin/iptables -N GUIINPUT
	/sbin/iptables -A INPUT -j GUIINPUT

	# Accept everything connected
	/sbin/iptables -A INPUT   -m state --state ESTABLISHED,RELATED -j ACCEPT
	/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT

	# localhost and ethernet.
	/sbin/iptables -A INPUT   -i lo          -m state --state NEW -j ACCEPT
	/sbin/iptables -A INPUT   -s 127.0.0.0/8 -m state --state NEW -j DROP   # Loopback not on lo
	/sbin/iptables -A INPUT   -d 127.0.0.0/8 -m state --state NEW -j DROP
	/sbin/iptables -A FORWARD -i lo          -m state --state NEW -j ACCEPT
	/sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
	/sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
	/sbin/iptables -A INPUT   -i $GREEN_DEV  -m state --state NEW -j ACCEPT -p ! icmp
	/sbin/iptables -A FORWARD -i $GREEN_DEV  -m state --state NEW -j ACCEPT

	# If a host on orange tries to initiate a connection to IPFire's red IP and
	# the connection gets DNATed back through a port forward to a server on orange
	# we end up with orange -> orange traffic passing through IPFire
	[ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT

	# accept all traffic from ipsec interfaces
	/sbin/iptables -A INPUT   -i ipsec+ -j ACCEPT
	/sbin/iptables -A FORWARD -i ipsec+ -j ACCEPT

	# allow DHCP on BLUE to be turned on/off
	/sbin/iptables -N DHCPBLUEINPUT 
	/sbin/iptables -A INPUT -j DHCPBLUEINPUT

	# IPSec chains
	/sbin/iptables -N IPSECRED
	/sbin/iptables -A INPUT -j IPSECRED
	/sbin/iptables -N IPSECBLUE
	/sbin/iptables -A INPUT -j IPSECBLUE

	# WIRELESS chains
	/sbin/iptables -N WIRELESSINPUT
	/sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT
	/sbin/iptables -N WIRELESSFORWARD
	/sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD

	# RED chain, used for the red interface
	/sbin/iptables -N REDINPUT
	/sbin/iptables -A INPUT -j REDINPUT
	/sbin/iptables -N REDFORWARD
	/sbin/iptables -A FORWARD -j REDFORWARD
	/sbin/iptables -t nat -N REDNAT
	/sbin/iptables -t nat -A POSTROUTING -j REDNAT

	iptables_red

	# DMZ pinhole chain.  setdmzholes setuid prog adds rules here to allow
	# ORANGE to talk to GREEN / BLUE.
	/sbin/iptables -N DMZHOLES
	if [ "$ORANGE_DEV" != "" ]; then
		/sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES
	fi

	# XTACCESS chain, used for external access
	/sbin/iptables -N XTACCESS
	/sbin/iptables -A INPUT -m state --state NEW -j XTACCESS

	# PORTFWACCESS chain, used for portforwarding
	/sbin/iptables -N PORTFWACCESS
	/sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS

	# Custom prerouting chains (for transparent proxy and port forwarding)
	/sbin/iptables -t nat -N SQUID
	/sbin/iptables -t nat -A PREROUTING -j SQUID
	/sbin/iptables -t nat -N PORTFW
	/sbin/iptables -t nat -A PREROUTING -j PORTFW


	# Custom mangle chain (for port fowarding)
	/sbin/iptables -t mangle -N PORTFWMANGLE
	/sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE

	# Postrouting rules (for port forwarding)
	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \
	 --to-source $GREEN_ADDRESS
	if [ "$BLUE_DEV" != "" ]; then
		/sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS
	fi
	if [ "$ORANGE_DEV" != "" ]; then
		/sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS
	fi

	# run openvpn
	/usr/local/bin/openvpnctrl --create-chains-and-rules

	# run local firewall configuration, if present
 	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local start
	fi
	
	# last rule in input and forward chain is for logging.
	/sbin/iptables -A INPUT   -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
	/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
        ;;
  stop)
	iptables_init
	# Accept everyting connected
	/sbin/iptables -A INPUT   -m state --state ESTABLISHED,RELATED -j ACCEPT

	# localhost and ethernet.
	/sbin/iptables -A INPUT -i lo -j ACCEPT
	/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT

	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
		/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	fi
	if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
		/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	fi

	# stop openvpn
	/usr/local/bin/openvpnctrl --delete-chains-and-rules

	# run local firewall configuration, if present
 	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local stop
	fi

	/sbin/iptables -A INPUT   -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
	/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
        ;;
  reload)
	iptables_red

	# run local firewall configuration, if present
 	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local reload
	fi
	;;
  restart)
	$0 stop
	$0 start
	;;
  *)
        echo "Usage: $0 {start|stop|reload|restart}"
        exit 1
	;;
esac

exit 0
Commit	Line	Data
3a1019f6 MT	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	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
	6
	7	if [ -f /var/ipfire/red/device ]; then
	8	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	9	fi
	10
	11	iptables_init() {
	12	# Flush all rules and delete all custom chains
	13	/sbin/iptables -F
	14	/sbin/iptables -t nat -F
	15	/sbin/iptables -t mangle -F
	16	/sbin/iptables -X
	17	/sbin/iptables -t nat -X
	18	/sbin/iptables -t mangle -X
	19
	20	# Set up policies
	21	/sbin/iptables -P INPUT DROP
	22	/sbin/iptables -P FORWARD DROP
	23	/sbin/iptables -P OUTPUT ACCEPT
	24
	25	# Empty LOG_DROP and LOG_REJECT chains
	26	/sbin/iptables -N LOG_DROP
	27	/sbin/iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
	28	/sbin/iptables -A LOG_DROP -j DROP
	29	/sbin/iptables -N LOG_REJECT
	30	/sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	31	/sbin/iptables -A LOG_REJECT -j REJECT
	32
	33	# This chain will log, then DROPs packets with certain bad combinations
	34	# of flags might indicate a port-scan attempt (xmas, null, etc)
	35	/sbin/iptables -N PSCAN
	36	/sbin/iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "TCP Scan? "
	37	/sbin/iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "UDP Scan? "
	38	/sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "ICMP Scan? "
	39	/sbin/iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "FRAG Scan? "
	40	/sbin/iptables -A PSCAN -j DROP
	41
	42	# New tcp packets without SYN set - could well be an obscure type of port scan
	43	# that's not covered above, may just be a broken windows machine
	44	/sbin/iptables -N NEWNOTSYN
	45	/sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "NEW not SYN? "
	46	/sbin/iptables -A NEWNOTSYN -j DROP
	47
	48	# Chain to contain all the rules relating to bad TCP flags
	49	/sbin/iptables -N BADTCP
	50
	51	# Disallow packets frequently used by port-scanners
	52	# nmap xmas
	53	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	54	# Null
	55	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
	56	# FIN
	57	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
	58	# SYN/RST (also catches xmas variants that set SYN+RST+...)
	59	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
	60	# SYN/FIN (QueSO or nmap OS probe)
	61	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
	62	# NEW TCP without SYN
	63	/sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN
	64
65	/sbin/iptables -A INPUT -j BADTCP
66	/sbin/iptables -A FORWARD -j BADTCP
67
68	}
69
70	iptables_red() {
71	/sbin/iptables -F REDINPUT
72	/sbin/iptables -F REDFORWARD
73	/sbin/iptables -t nat -F REDNAT
74
75	# PPPoE / PPTP Device
76	if [ "$IFACE" != "" ]; then
77	# PPPoE / PPTP
78	if [ "$DEVICE" != "" ]; then
79	/sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT
80	fi
81	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
82	if [ "$RED_DEV" != "" ]; then
83	/sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT
84	fi
85	fi
86	fi
87
88	# PPTP over DHCP
89	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
90	/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
91	/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
92	fi
93
94	# Orange pinholes
95	if [ "$ORANGE_DEV" != "" ]; then
96	# This rule enables a host on ORANGE network to connect to the outside
97	# (only if we have a red connection)
98	if [ "$IFACE" != "" ]; then
99	/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p tcp -o $IFACE -j ACCEPT
100	/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p udp -o $IFACE -j ACCEPT
101	fi
102	fi
103
104	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
105	# DHCP
106	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
107	/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
108	/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
109	fi
110	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
111	/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
112	/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
113	fi
114
115	# Outgoing masquerading
116	/sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
117
118	fi
119	}
120
121	# See how we were called.
122	case "$1" in
123	start)
124	iptables_init
125
126	# Limit Packets- helps reduce dos/syn attacks
127	# original do nothing line
128	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec
129	# the correct one, but the negative '!' do nothing...
130	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit ! --limit 10/sec -j DROP
131
132	# Fix for braindead ISP's
133	/sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
134
135	# CUSTOM chains, can be used by the users themselves
136	/sbin/iptables -N CUSTOMINPUT
137	/sbin/iptables -A INPUT -j CUSTOMINPUT
138	/sbin/iptables -N CUSTOMFORWARD
139	/sbin/iptables -A FORWARD -j CUSTOMFORWARD
140	/sbin/iptables -N CUSTOMOUTPUT
141	/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
142	/sbin/iptables -t nat -N CUSTOMPREROUTING
143	/sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
144	/sbin/iptables -t nat -N CUSTOMPOSTROUTING
145	/sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
146
147	# filtering from GUI
148	/sbin/iptables -N GUIINPUT
149	/sbin/iptables -A INPUT -j GUIINPUT
150
151	# Accept everything connected
152	/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
153	/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
154
155	# localhost and ethernet.
156	/sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
157	/sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo
158	/sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP
159	/sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
160	/sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
161	/sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
162	/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT -p ! icmp
163	/sbin/iptables -A FORWARD -i $GREEN_DEV -m state --state NEW -j ACCEPT
164
165	# If a host on orange tries to initiate a connection to IPFire's red IP and
166	# the connection gets DNATed back through a port forward to a server on orange
167	# we end up with orange -> orange traffic passing through IPFire
168	[ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT
169
170	# accept all traffic from ipsec interfaces
171	/sbin/iptables -A INPUT -i ipsec+ -j ACCEPT
172	/sbin/iptables -A FORWARD -i ipsec+ -j ACCEPT
173
174	# allow DHCP on BLUE to be turned on/off
175	/sbin/iptables -N DHCPBLUEINPUT
176	/sbin/iptables -A INPUT -j DHCPBLUEINPUT
177
178	# IPSec chains
179	/sbin/iptables -N IPSECRED
180	/sbin/iptables -A INPUT -j IPSECRED
181	/sbin/iptables -N IPSECBLUE
182	/sbin/iptables -A INPUT -j IPSECBLUE
183
184	# WIRELESS chains
185	/sbin/iptables -N WIRELESSINPUT
186	/sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT
187	/sbin/iptables -N WIRELESSFORWARD
188	/sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD
189
190	# RED chain, used for the red interface
191	/sbin/iptables -N REDINPUT
192	/sbin/iptables -A INPUT -j REDINPUT
193	/sbin/iptables -N REDFORWARD
194	/sbin/iptables -A FORWARD -j REDFORWARD
195	/sbin/iptables -t nat -N REDNAT
196	/sbin/iptables -t nat -A POSTROUTING -j REDNAT
197
198	iptables_red
199
200	# DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow
201	# ORANGE to talk to GREEN / BLUE.
202	/sbin/iptables -N DMZHOLES
203	if [ "$ORANGE_DEV" != "" ]; then
204	/sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES
205	fi
206
207	# XTACCESS chain, used for external access
208	/sbin/iptables -N XTACCESS
209	/sbin/iptables -A INPUT -m state --state NEW -j XTACCESS
210
211	# PORTFWACCESS chain, used for portforwarding
212	/sbin/iptables -N PORTFWACCESS
213	/sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS
214
215	# Custom prerouting chains (for transparent proxy and port forwarding)
216	/sbin/iptables -t nat -N SQUID
217	/sbin/iptables -t nat -A PREROUTING -j SQUID
218	/sbin/iptables -t nat -N PORTFW
219	/sbin/iptables -t nat -A PREROUTING -j PORTFW
220
221
222	# Custom mangle chain (for port fowarding)
223	/sbin/iptables -t mangle -N PORTFWMANGLE
224	/sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE
225
226	# Postrouting rules (for port forwarding)
227	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \
228	--to-source $GREEN_ADDRESS
229	if [ "$BLUE_DEV" != "" ]; then
230	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS
231	fi
232	if [ "$ORANGE_DEV" != "" ]; then
233	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS
234	fi
235
236	# run openvpn
237	/usr/local/bin/openvpnctrl --create-chains-and-rules
238
239	# run local firewall configuration, if present
240	if [ -x /etc/sysconfig/firewall.local ]; then
241	/etc/sysconfig/firewall.local start
242	fi
243
244	# last rule in input and forward chain is for logging.
245	/sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
246	/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
247	;;
248	stop)
249	iptables_init
250	# Accept everyting connected
251	/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
252
253	# localhost and ethernet.
254	/sbin/iptables -A INPUT -i lo -j ACCEPT
255	/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT
256
257	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
258	/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
259	/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
260	fi
261	if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
262	/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
263	/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
264	fi
265
266	# stop openvpn
267	/usr/local/bin/openvpnctrl --delete-chains-and-rules
268
269	# run local firewall configuration, if present
270	if [ -x /etc/sysconfig/firewall.local ]; then
271	/etc/sysconfig/firewall.local stop
272	fi
273
274	/sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
275	/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
276	;;
277	reload)
278	iptables_red
279
280	# run local firewall configuration, if present
281	if [ -x /etc/sysconfig/firewall.local ]; then
282	/etc/sysconfig/firewall.local reload
283	fi
284	;;
285	restart)
286	$0 stop
287	$0 start
288	;;
289	*)
290	echo "Usage: $0 {start\|stop\|reload\|restart}"
291	exit 1
292	;;
293	esac
294
295	exit 0