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

#!/bin/sh

. /etc/sysconfig/rc
. ${rc_functions}

eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/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

function iptables() {
	/sbin/iptables --wait "$@"
}

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

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

	# Empty LOG_DROP and LOG_REJECT chains
	iptables -N LOG_DROP
	iptables -A LOG_DROP   -m limit --limit 10/minute -j LOG
	iptables -A LOG_DROP   -j DROP
	iptables -N LOG_REJECT
	iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	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)
	iptables -N PSCAN
	if [ "$DROPPORTSCAN" == "on" ]; then
		iptables -A PSCAN -p tcp  -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
		iptables -A PSCAN -p udp  -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
		iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
		iptables -A PSCAN -f      -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
	fi
	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"

	# 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
	iptables -N NEWNOTSYN
	if [ "$DROPNEWNOTSYN" == "on" ]; then
		iptables -A NEWNOTSYN  -m limit --limit 10/minute -j LOG  --log-prefix "DROP_NEWNOTSYN "
	fi
	iptables -A NEWNOTSYN  -j DROP -m comment --comment "DROP_NEWNOTSYN"

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

	# Don't check loopback
	iptables -A BADTCP -i lo -j RETURN

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

	iptables -A INPUT   -p tcp -j BADTCP
	iptables -A FORWARD -p tcp -j BADTCP

	# Connection tracking chain
	iptables -N CONNTRACK
	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j DROP

	# Fix for braindead ISP's
	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
	iptables -N CUSTOMINPUT
	iptables -A INPUT -j CUSTOMINPUT
	iptables -N CUSTOMFORWARD
	iptables -A FORWARD -j CUSTOMFORWARD
	iptables -N CUSTOMOUTPUT
	iptables -A OUTPUT -j CUSTOMOUTPUT
	iptables -t nat -N CUSTOMPREROUTING
	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	iptables -t nat -N CUSTOMPOSTROUTING
	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING

	# Guardian (IPS) chains
	iptables -N GUARDIAN
	iptables -A INPUT -j GUARDIAN
	iptables -A FORWARD -j GUARDIAN

	# Block OpenVPN transfer networks
	iptables -N OVPNBLOCK
	iptables -A INPUT   -i tun+ -j OVPNBLOCK
	iptables -A FORWARD -i tun+ -j OVPNBLOCK
	iptables -A FORWARD -o tun+ -j OVPNBLOCK

	# OpenVPN transfer network translation
	iptables -t nat -N OVPNNAT
	iptables -t nat -A POSTROUTING -j OVPNNAT

	# IPTV chains for IGMPPROXY
	iptables -N IPTVINPUT
	iptables -A INPUT -j IPTVINPUT
	iptables -N IPTVFORWARD
	iptables -A FORWARD -j IPTVFORWARD

	# Allow to ping the firewall.
	iptables -N ICMPINPUT
	iptables -A INPUT -j ICMPINPUT
	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT

	# Accept everything on loopback
	iptables -N LOOPBACK
	iptables -A LOOPBACK -i lo -j ACCEPT
	iptables -A LOOPBACK -o lo -j ACCEPT

	# Filter all packets with loopback addresses on non-loopback interfaces.
	iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
	iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP

	for i in INPUT FORWARD OUTPUT; do
		iptables -A ${i} -j LOOPBACK
	done

	# Accept everything connected
	for i in INPUT FORWARD OUTPUT; do
		iptables -A ${i} -j CONNTRACK
	done

	# Allow DHCP
	iptables -N DHCPINPUT
	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT

	iptables -N DHCPOUTPUT
	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT

	# Allow DHCP on GREEN
	iptables -N DHCPGREENINPUT
	iptables -N DHCPGREENOUTPUT
	if [ -n "${GREEN_DEV}" ]; then
		iptables -A INPUT  -i "${GREEN_DEV}" -j DHCPGREENINPUT
		iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	fi

	# allow DHCP on BLUE to be turned on/off
	iptables -N DHCPBLUEINPUT
	iptables -N DHCPBLUEOUTPUT
	if [ -n "${BLUE_DEV}" ]; then
		iptables -A INPUT  -i "${BLUE_DEV}" -j DHCPBLUEINPUT
		iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	fi

	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
	iptables -N IPSECINPUT
	iptables -N IPSECFORWARD
	iptables -N IPSECOUTPUT
	iptables -A INPUT -j IPSECINPUT
	iptables -A FORWARD -j IPSECFORWARD
	iptables -A OUTPUT -j IPSECOUTPUT
	iptables -t nat -N IPSECNAT
	iptables -t nat -A POSTROUTING -j IPSECNAT

	# localhost and ethernet.
	# Always allow accessing the web GUI from GREEN.
	iptables -N GUIINPUT
	iptables -A INPUT -j GUIINPUT
	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT

	# WIRELESS chains
	iptables -N WIRELESSINPUT
	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	iptables -N WIRELESSFORWARD
	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD

	# OpenVPN
	iptables -N OVPNINPUT
	iptables -A INPUT -j OVPNINPUT

	# TOR
	iptables -N TOR_INPUT
	iptables -A INPUT -j TOR_INPUT
	
	# Jump into the actual firewall ruleset.
	iptables -N INPUTFW
	iptables -A INPUT -j INPUTFW

	iptables -N OUTGOINGFW
	iptables -A OUTPUT -j OUTGOINGFW

	iptables -N FORWARDFW
	iptables -A FORWARD -j FORWARDFW

	# SNAT rules
	iptables -t nat -N NAT_SOURCE
	iptables -t nat -A POSTROUTING -j NAT_SOURCE

	# Custom prerouting chains (for transparent proxy)
	iptables -t nat -N SQUID
	iptables -t nat -A PREROUTING -j SQUID

	# DNAT rules
	iptables -t nat -N NAT_DESTINATION
	iptables -t nat -A PREROUTING -j NAT_DESTINATION
	iptables -t nat -A OUTPUT -j NAT_DESTINATION

	iptables -t mangle -N NAT_DESTINATION
	iptables -t mangle -A PREROUTING -j NAT_DESTINATION

	iptables -t nat -N NAT_DESTINATION_FIX
	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX

	iptables -t nat -A NAT_DESTINATION_FIX \
		-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"

	if [ -n "${BLUE_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark 2 -j SNAT --to-source "${BLUE_ADDRESS}"
	fi

	if [ -n "${ORANGE_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark 3 -j SNAT --to-source "${ORANGE_ADDRESS}"
	fi

	# upnp chain for our upnp daemon
	iptables -t nat -N UPNPFW
	iptables -t nat -A PREROUTING -j UPNPFW
	iptables -N UPNPFW
	iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW

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

	# Apply OpenVPN firewall rules
	/usr/local/bin/openvpnctrl --firewall-rules

	# run wirelessctrl
	/usr/local/bin/wirelessctrl

	# POLICY CHAIN
	iptables -N POLICYIN
	iptables -A INPUT -j POLICYIN
	iptables -N POLICYFWD
	iptables -A FORWARD -j POLICYFWD
	iptables -N POLICYOUT
	iptables -A OUTPUT -j POLICYOUT

	# Initialize firewall policies.
	/usr/sbin/firewall-policy

	# Install firewall rules for the red interface.
	iptables_red
}

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

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

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

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

		# Outgoing masquerading (don't masqerade IPSEC (mark 50))
		iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN

		if [ "$IFACE" != "$GREEN_DEV" ]; then
			iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
		fi

	fi

	# Reload all rules.
	/usr/local/bin/firewallctrl
}

# See how we were called.
case "$1" in
  start)
	boot_mesg "Loading firewall modules into the kernel"
	modprobe iptable_nat || failed=1
	for i in $(find /lib/modules/$(uname -r) -name nf_conntrack*); do
		modprobe $(basename $i | cut -d. -f1) || failed=1
	done
	for i in $(find /lib/modules/$(uname -r) -name nf_nat*); do
		modprobe $(basename $i | cut -d. -f1) || failed=1
	done
	(exit ${failed})
	evaluate_retval

	if [ -e /var/ipfire/main/disable_nf_sip ]; then
		rmmod nf_nat_sip
		rmmod nf_conntrack_sip
		rmmod nf_nat_h323
		rmmod nf_conntrack_h323
	fi

	boot_mesg "Setting up firewall"
	iptables_init
	evaluate_retval

	# run local firewall configuration, if present
	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local start
	fi
	;;
  reload)
	boot_mesg "Reloading firewall"
	iptables_red
	evaluate_retval

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

exit 0
Commit	Line	Data
	1	#!/bin/sh
	2
	3	. /etc/sysconfig/rc
	4	. ${rc_functions}
	5
	6	eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
	7	eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
	8	eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
	9	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
	10
	11	if [ -f /var/ipfire/red/device ]; then
	12	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	13	fi
	14
	15	function iptables() {
	16	/sbin/iptables --wait "$@"
	17	}
	18
	19	iptables_init() {
	20	# Flush all rules and delete all custom chains
	21	iptables -F
	22	iptables -t nat -F
	23	iptables -t mangle -F
	24	iptables -X
	25	iptables -t nat -X
	26	iptables -t mangle -X
	27
	28	# Set up policies
	29	iptables -P INPUT DROP
	30	iptables -P FORWARD DROP
	31	iptables -P OUTPUT ACCEPT
	32
	33	# Empty LOG_DROP and LOG_REJECT chains
	34	iptables -N LOG_DROP
	35	iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
	36	iptables -A LOG_DROP -j DROP
	37	iptables -N LOG_REJECT
	38	iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	39	iptables -A LOG_REJECT -j REJECT
	40
	41	# This chain will log, then DROPs packets with certain bad combinations
	42	# of flags might indicate a port-scan attempt (xmas, null, etc)
	43	iptables -N PSCAN
	44	if [ "$DROPPORTSCAN" == "on" ]; then
	45	iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
	46	iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
	47	iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
	48	iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
	49	fi
	50	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
	51
	52	# New tcp packets without SYN set - could well be an obscure type of port scan
	53	# that's not covered above, may just be a broken windows machine
	54	iptables -N NEWNOTSYN
	55	if [ "$DROPNEWNOTSYN" == "on" ]; then
	56	iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
	57	fi
	58	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
	59
	60	# Chain to contain all the rules relating to bad TCP flags
	61	iptables -N BADTCP
	62
	63	# Don't check loopback
	64	iptables -A BADTCP -i lo -j RETURN
	65
	66	# Disallow packets frequently used by port-scanners
	67	# NMAP FIN/URG/PSH (XMAS scan)
	68	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	69	# SYN/RST/ACK/FIN/URG
	70	iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
	71	# ALL/ALL
	72	iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
	73	# FIN Stealth
	74	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
	75	# SYN/RST (also catches xmas variants that set SYN+RST+...)
	76	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
	77	# SYN/FIN (QueSO or nmap OS probe)
	78	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
	79	# Null
	80	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
	81	# NEW TCP without SYN
	82	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
	83
	84	iptables -A INPUT -p tcp -j BADTCP
	85	iptables -A FORWARD -p tcp -j BADTCP
	86
	87	# Connection tracking chain
	88	iptables -N CONNTRACK
	89	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
	90	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j DROP
	91
	92	# Fix for braindead ISP's
	93	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
	94
	95	# CUSTOM chains, can be used by the users themselves
	96	iptables -N CUSTOMINPUT
	97	iptables -A INPUT -j CUSTOMINPUT
	98	iptables -N CUSTOMFORWARD
	99	iptables -A FORWARD -j CUSTOMFORWARD
	100	iptables -N CUSTOMOUTPUT
	101	iptables -A OUTPUT -j CUSTOMOUTPUT
	102	iptables -t nat -N CUSTOMPREROUTING
	103	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	104	iptables -t nat -N CUSTOMPOSTROUTING
	105	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
	106
	107	# Guardian (IPS) chains
	108	iptables -N GUARDIAN
	109	iptables -A INPUT -j GUARDIAN
	110	iptables -A FORWARD -j GUARDIAN
	111
	112	# Block OpenVPN transfer networks
	113	iptables -N OVPNBLOCK
	114	iptables -A INPUT -i tun+ -j OVPNBLOCK
	115	iptables -A FORWARD -i tun+ -j OVPNBLOCK
	116	iptables -A FORWARD -o tun+ -j OVPNBLOCK
	117
	118	# OpenVPN transfer network translation
	119	iptables -t nat -N OVPNNAT
	120	iptables -t nat -A POSTROUTING -j OVPNNAT
	121
	122	# IPTV chains for IGMPPROXY
	123	iptables -N IPTVINPUT
	124	iptables -A INPUT -j IPTVINPUT
	125	iptables -N IPTVFORWARD
	126	iptables -A FORWARD -j IPTVFORWARD
	127
	128	# Allow to ping the firewall.
	129	iptables -N ICMPINPUT
	130	iptables -A INPUT -j ICMPINPUT
	131	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
	132
	133	# Accept everything on loopback
	134	iptables -N LOOPBACK
	135	iptables -A LOOPBACK -i lo -j ACCEPT
	136	iptables -A LOOPBACK -o lo -j ACCEPT
	137
	138	# Filter all packets with loopback addresses on non-loopback interfaces.
	139	iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
	140	iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP
	141
	142	for i in INPUT FORWARD OUTPUT; do
	143	iptables -A ${i} -j LOOPBACK
	144	done
	145
	146	# Accept everything connected
	147	for i in INPUT FORWARD OUTPUT; do
	148	iptables -A ${i} -j CONNTRACK
	149	done
	150
	151	# Allow DHCP
	152	iptables -N DHCPINPUT
	153	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	154	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	155
	156	iptables -N DHCPOUTPUT
	157	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	158	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	159
	160	# Allow DHCP on GREEN
	161	iptables -N DHCPGREENINPUT
	162	iptables -N DHCPGREENOUTPUT
	163	if [ -n "${GREEN_DEV}" ]; then
	164	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	165	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	166	fi
	167
	168	# allow DHCP on BLUE to be turned on/off
	169	iptables -N DHCPBLUEINPUT
	170	iptables -N DHCPBLUEOUTPUT
	171	if [ -n "${BLUE_DEV}" ]; then
	172	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	173	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	174	fi
	175
	176	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
	177	iptables -N IPSECINPUT
	178	iptables -N IPSECFORWARD
	179	iptables -N IPSECOUTPUT
	180	iptables -A INPUT -j IPSECINPUT
	181	iptables -A FORWARD -j IPSECFORWARD
	182	iptables -A OUTPUT -j IPSECOUTPUT
	183	iptables -t nat -N IPSECNAT
	184	iptables -t nat -A POSTROUTING -j IPSECNAT
	185
	186	# localhost and ethernet.
	187	# Always allow accessing the web GUI from GREEN.
	188	iptables -N GUIINPUT
	189	iptables -A INPUT -j GUIINPUT
	190	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	191
	192	# WIRELESS chains
	193	iptables -N WIRELESSINPUT
	194	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	195	iptables -N WIRELESSFORWARD
	196	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
	197
	198	# OpenVPN
	199	iptables -N OVPNINPUT
	200	iptables -A INPUT -j OVPNINPUT
	201
	202	# TOR
	203	iptables -N TOR_INPUT
	204	iptables -A INPUT -j TOR_INPUT
	205
	206	# Jump into the actual firewall ruleset.
	207	iptables -N INPUTFW
	208	iptables -A INPUT -j INPUTFW
	209
	210	iptables -N OUTGOINGFW
	211	iptables -A OUTPUT -j OUTGOINGFW
	212
	213	iptables -N FORWARDFW
	214	iptables -A FORWARD -j FORWARDFW
	215
	216	# SNAT rules
	217	iptables -t nat -N NAT_SOURCE
	218	iptables -t nat -A POSTROUTING -j NAT_SOURCE
	219
	220	# Custom prerouting chains (for transparent proxy)
	221	iptables -t nat -N SQUID
	222	iptables -t nat -A PREROUTING -j SQUID
	223
	224	# DNAT rules
	225	iptables -t nat -N NAT_DESTINATION
	226	iptables -t nat -A PREROUTING -j NAT_DESTINATION
	227	iptables -t nat -A OUTPUT -j NAT_DESTINATION
	228
	229	iptables -t mangle -N NAT_DESTINATION
	230	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	231
	232	iptables -t nat -N NAT_DESTINATION_FIX
	233	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	234
	235	iptables -t nat -A NAT_DESTINATION_FIX \
	236	-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"
	237
	238	if [ -n "${BLUE_ADDRESS}" ]; then
	239	iptables -t nat -A NAT_DESTINATION_FIX \
	240	-m mark --mark 2 -j SNAT --to-source "${BLUE_ADDRESS}"
	241	fi
	242
	243	if [ -n "${ORANGE_ADDRESS}" ]; then
	244	iptables -t nat -A NAT_DESTINATION_FIX \
	245	-m mark --mark 3 -j SNAT --to-source "${ORANGE_ADDRESS}"
	246	fi
	247
	248	# upnp chain for our upnp daemon
	249	iptables -t nat -N UPNPFW
	250	iptables -t nat -A PREROUTING -j UPNPFW
	251	iptables -N UPNPFW
	252	iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW
	253
	254	# RED chain, used for the red interface
	255	iptables -N REDINPUT
	256	iptables -A INPUT -j REDINPUT
	257	iptables -N REDFORWARD
	258	iptables -A FORWARD -j REDFORWARD
	259	iptables -t nat -N REDNAT
	260	iptables -t nat -A POSTROUTING -j REDNAT
	261
	262	# Apply OpenVPN firewall rules
	263	/usr/local/bin/openvpnctrl --firewall-rules
	264
	265	# run wirelessctrl
	266	/usr/local/bin/wirelessctrl
	267
	268	# POLICY CHAIN
	269	iptables -N POLICYIN
	270	iptables -A INPUT -j POLICYIN
	271	iptables -N POLICYFWD
	272	iptables -A FORWARD -j POLICYFWD
	273	iptables -N POLICYOUT
	274	iptables -A OUTPUT -j POLICYOUT
	275
	276	# Initialize firewall policies.
	277	/usr/sbin/firewall-policy
	278
	279	# Install firewall rules for the red interface.
	280	iptables_red
	281	}
	282
	283	iptables_red() {
	284	iptables -F REDINPUT
	285	iptables -F REDFORWARD
	286	iptables -t nat -F REDNAT
	287
	288	# PPPoE / PPTP Device
	289	if [ "$IFACE" != "" ]; then
	290	# PPPoE / PPTP
	291	if [ "$DEVICE" != "" ]; then
	292	iptables -A REDINPUT -i $DEVICE -j ACCEPT
	293	fi
	294	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	295	if [ "$RED_DEV" != "" ]; then
	296	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
	297	fi
	298	fi
	299	fi
	300
	301	# PPTP over DHCP
	302	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
	303	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
	304	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
	305	fi
	306
	307	# Orange pinholes
	308	if [ "$ORANGE_DEV" != "" ]; then
	309	# This rule enables a host on ORANGE network to connect to the outside
	310	# (only if we have a red connection)
	311	if [ "$IFACE" != "" ]; then
	312	iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
	313	fi
	314	fi
	315
	316	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	317	# DHCP
	318	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
	319	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	320	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	321	fi
	322	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
	323	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	324	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	325	fi
	326
	327	# Outgoing masquerading (don't masqerade IPSEC (mark 50))
	328	iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
	329
	330	if [ "$IFACE" != "$GREEN_DEV" ]; then
	331	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
	332	fi
	333
	334	fi
	335
	336	# Reload all rules.
	337	/usr/local/bin/firewallctrl
	338	}
	339
	340	# See how we were called.
	341	case "$1" in
	342	start)
	343	boot_mesg "Loading firewall modules into the kernel"
	344	modprobe iptable_nat \|\| failed=1
	345	for i in $(find /lib/modules/$(uname -r) -name nf_conntrack*); do
	346	modprobe $(basename $i \| cut -d. -f1) \|\| failed=1
	347	done
	348	for i in $(find /lib/modules/$(uname -r) -name nf_nat*); do
	349	modprobe $(basename $i \| cut -d. -f1) \|\| failed=1
	350	done
	351	(exit ${failed})
	352	evaluate_retval
	353
	354	if [ -e /var/ipfire/main/disable_nf_sip ]; then
	355	rmmod nf_nat_sip
	356	rmmod nf_conntrack_sip
	357	rmmod nf_nat_h323
	358	rmmod nf_conntrack_h323
	359	fi
	360
	361	boot_mesg "Setting up firewall"
	362	iptables_init
	363	evaluate_retval
	364
	365	# run local firewall configuration, if present
	366	if [ -x /etc/sysconfig/firewall.local ]; then
	367	/etc/sysconfig/firewall.local start
	368	fi
	369	;;
	370	reload)
	371	boot_mesg "Reloading firewall"
	372	iptables_red
	373	evaluate_retval
	374
	375	# run local firewall configuration, if present
	376	if [ -x /etc/sysconfig/firewall.local ]; then
	377	/etc/sysconfig/firewall.local reload
	378	fi
	379	;;
	380	restart)
	381	# run local firewall configuration, if present
	382	if [ -x /etc/sysconfig/firewall.local ]; then
	383	/etc/sysconfig/firewall.local stop
	384	fi
	385	$0 start
	386	;;
	387	*)
	388	echo "Usage: $0 {start\|reload\|restart}"
	389	exit 1
	390	;;
	391	esac
	392
	393	exit 0