[people/pmueller/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

	# P2PBLOCK
	iptables -N P2PBLOCK
	iptables -A INPUT -j P2PBLOCK
	iptables -A FORWARD -j P2PBLOCK
	iptables -A OUTPUT -j P2PBLOCK
	
	# 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_up

	# If red has not been brought up yet, we will
	# add the blocking rules for MASQUERADE
	if [ ! -e "/var/ipfire/red/active" ]; then
		iptables_red_down
	fi
}

iptables_red_up() {
	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
			MASQUERADE_GREEN="off"
		fi

		local NO_MASQ_NETWORKS

		if [ "${MASQUERADE_GREEN}" = "off" ]; then
			NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
		fi

		if [ "${MASQUERADE_BLUE}" = "off" ]; then
			NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
		fi

		if [ "${MASQUERADE_ORANGE}" = "off" ]; then
			NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
		fi

		local network
		for network in ${NO_MASQ_NETWORKS}; do
			iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
		done

		# Masquerade everything else
		iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
	fi

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

iptables_red_down() {
	# Prohibit packets to reach the masquerading rule
	# while the wan interface is down - this is required to
	# circumvent udp related NAT issues
	# http://forum.ipfire.org/index.php?topic=11127.0
	if [ -n "${IFACE}" ]; then
		iptables -F REDFORWARD
		iptables -A REDFORWARD -o "${IFACE}" -j DROP
	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
	;;
  reload|up)
	boot_mesg "Reloading firewall"
	iptables_red_up
	evaluate_retval
	;;
  down)
	boot_mesg "Disabling firewall access to RED"
	iptables_red_down
	evaluate_retval
	;;
  restart)
	$0 start
	;;
  *)
        echo "Usage: $0 {start|reload|restart}"
        exit 1
	;;
esac

exit 0
Commit	Line	Data
3a1019f6 MT	1	#!/bin/sh
3a1019f6 MT	2
0f5c5ce7 MT	3	. /etc/sysconfig/rc
	4	. ${rc_functions}
	5
3a1019f6 MT	6	eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
3a1019f6 MT	7	eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
fe0cd647	8	eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
3a1019f6 MT	9	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
	10
	11	if [ -f /var/ipfire/red/device ]; then
	12	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	13	fi
	14
c581b670 MT	15	function iptables() {
	16	/sbin/iptables --wait "$@"
	17	}
	18
3a1019f6 MT	19	iptables_init() {
3a1019f6 MT	20	# Flush all rules and delete all custom chains
c581b670 MT	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
3a1019f6 MT	27
3a1019f6 MT	28	# Set up policies
c581b670 MT	29	iptables -P INPUT DROP
	30	iptables -P FORWARD DROP
	31	iptables -P OUTPUT ACCEPT
3a1019f6 MT	32
3a1019f6 MT	33	# Empty LOG_DROP and LOG_REJECT chains
c581b670 MT	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
3a1019f6 MT	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)
c581b670	43	iptables -N PSCAN
5595bc03	44	if [ "$DROPPORTSCAN" == "on" ]; then
c581b670 MT	45	iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
	46	iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
	47	iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
	48	iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	49	fi
c581b670	50	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	51
	52	# New tcp packets without SYN set - could well be an obscure type of port scan
	53	# that's not covered above, may just be a broken windows machine
c581b670	54	iptables -N NEWNOTSYN
5595bc03	55	if [ "$DROPNEWNOTSYN" == "on" ]; then
c581b670	56	iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	57	fi
c581b670	58	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6 MT	59
3a1019f6 MT	60	# Chain to contain all the rules relating to bad TCP flags
c581b670	61	iptables -N BADTCP
3a1019f6	62
c581b670 MT	63	# Don't check loopback
c581b670 MT	64	iptables -A BADTCP -i lo -j RETURN
d8158ca6	65
3a1019f6	66	# Disallow packets frequently used by port-scanners
dccbf1bf AF	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
c581b670	74	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
3a1019f6	75	# SYN/RST (also catches xmas variants that set SYN+RST+...)
c581b670	76	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
3a1019f6	77	# SYN/FIN (QueSO or nmap OS probe)
c581b670	78	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
dccbf1bf AF	79	# Null
dccbf1bf AF	80	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
3a1019f6	81	# NEW TCP without SYN
c581b670	82	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
b85d2a98	83
c581b670 MT	84	iptables -A INPUT -p tcp -j BADTCP
c581b670 MT	85	iptables -A FORWARD -p tcp -j BADTCP
c0359d6d	86
b85d2a98	87	# Connection tracking chain
c581b670 MT	88	iptables -N CONNTRACK
c581b670 MT	89	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
dccbf1bf	90	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j DROP
3a1019f6	91
3a1019f6	92	# Fix for braindead ISP's
c581b670	93	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	94
3a1019f6 MT	95	# CUSTOM chains, can be used by the users themselves
c581b670 MT	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
3a1019f6	106
2a5b19c5 AF	107	# P2PBLOCK
	108	iptables -N P2PBLOCK
	109	iptables -A INPUT -j P2PBLOCK
	110	iptables -A FORWARD -j P2PBLOCK
	111	iptables -A OUTPUT -j P2PBLOCK
	112
815eaff4	113	# Guardian (IPS) chains
c581b670 MT	114	iptables -N GUARDIAN
	115	iptables -A INPUT -j GUARDIAN
	116	iptables -A FORWARD -j GUARDIAN
815eaff4	117
1e555330	118	# Block OpenVPN transfer networks
c581b670	119	iptables -N OVPNBLOCK
a0a5c14f	120	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	121	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	122	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	123
51ab1de1	124	# OpenVPN transfer network translation
c581b670 MT	125	iptables -t nat -N OVPNNAT
c581b670 MT	126	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	127
daa1ceba	128	# IPTV chains for IGMPPROXY
c581b670 MT	129	iptables -N IPTVINPUT
	130	iptables -A INPUT -j IPTVINPUT
	131	iptables -N IPTVFORWARD
	132	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	133
8e59a602 MT	134	# Allow to ping the firewall.
	135	iptables -N ICMPINPUT
	136	iptables -A INPUT -j ICMPINPUT
	137	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	138
afc611d4	139	# Accept everything on loopback
c581b670 MT	140	iptables -N LOOPBACK
	141	iptables -A LOOPBACK -i lo -j ACCEPT
	142	iptables -A LOOPBACK -o lo -j ACCEPT
afc611d4	143
3b9a23ce	144	# Filter all packets with loopback addresses on non-loopback interfaces.
c581b670 MT	145	iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
c581b670 MT	146	iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP
3b9a23ce MT	147
3b9a23ce MT	148	for i in INPUT FORWARD OUTPUT; do
c581b670	149	iptables -A ${i} -j LOOPBACK
3b9a23ce	150	done
afc611d4	151
3a1019f6	152	# Accept everything connected
b85d2a98	153	for i in INPUT FORWARD OUTPUT; do
c581b670	154	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	155	done
b85d2a98 MT	156
8490e496 MT	157	# Allow DHCP
	158	iptables -N DHCPINPUT
	159	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	160	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	161
	162	iptables -N DHCPOUTPUT
	163	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	164	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	165
	166	# Allow DHCP on GREEN
	167	iptables -N DHCPGREENINPUT
	168	iptables -N DHCPGREENOUTPUT
	169	if [ -n "${GREEN_DEV}" ]; then
	170	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	171	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	172	fi
	173
	174	# allow DHCP on BLUE to be turned on/off
	175	iptables -N DHCPBLUEINPUT
	176	iptables -N DHCPBLUEOUTPUT
	177	if [ -n "${BLUE_DEV}" ]; then
	178	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	179	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	180	fi
	181
5fd30232	182	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	183	iptables -N IPSECINPUT
	184	iptables -N IPSECFORWARD
	185	iptables -N IPSECOUTPUT
	186	iptables -A INPUT -j IPSECINPUT
	187	iptables -A FORWARD -j IPSECFORWARD
	188	iptables -A OUTPUT -j IPSECOUTPUT
	189	iptables -t nat -N IPSECNAT
	190	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	191
3a1019f6	192	# localhost and ethernet.
c0e0848f MT	193	# Always allow accessing the web GUI from GREEN.
	194	iptables -N GUIINPUT
	195	iptables -A INPUT -j GUIINPUT
	196	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
8490e496	197
81393987	198	# WIRELESS chains
c581b670 MT	199	iptables -N WIRELESSINPUT
	200	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	201	iptables -N WIRELESSFORWARD
	202	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	203
ab4876ad	204	# OpenVPN
c581b670 MT	205	iptables -N OVPNINPUT
c581b670 MT	206	iptables -A INPUT -j OVPNINPUT
ab4876ad	207
987b75bc	208	# TOR
c581b670 MT	209	iptables -N TOR_INPUT
c581b670 MT	210	iptables -A INPUT -j TOR_INPUT
12dcfbbd	211
d5f1422d	212	# Jump into the actual firewall ruleset.
c581b670 MT	213	iptables -N INPUTFW
c581b670 MT	214	iptables -A INPUT -j INPUTFW
d5f1422d	215
c581b670 MT	216	iptables -N OUTGOINGFW
c581b670 MT	217	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	218
c581b670 MT	219	iptables -N FORWARDFW
c581b670 MT	220	iptables -A FORWARD -j FORWARDFW
d5f1422d	221
fac38614	222	# SNAT rules
c581b670 MT	223	iptables -t nat -N NAT_SOURCE
c581b670 MT	224	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	225
bb12dd7b	226	# Custom prerouting chains (for transparent proxy)
c581b670 MT	227	iptables -t nat -N SQUID
c581b670 MT	228	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	229
bb12dd7b MT	230	# DNAT rules
c581b670 MT	231	iptables -t nat -N NAT_DESTINATION
c581b670 MT	232	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	233	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	234
6e87f0aa MT	235	iptables -t mangle -N NAT_DESTINATION
	236	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	237
	238	iptables -t nat -N NAT_DESTINATION_FIX
	239	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	240
	241	iptables -t nat -A NAT_DESTINATION_FIX \
	242	-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"
	243
	244	if [ -n "${BLUE_ADDRESS}" ]; then
	245	iptables -t nat -A NAT_DESTINATION_FIX \
	246	-m mark --mark 2 -j SNAT --to-source "${BLUE_ADDRESS}"
	247	fi
	248
	249	if [ -n "${ORANGE_ADDRESS}" ]; then
	250	iptables -t nat -A NAT_DESTINATION_FIX \
	251	-m mark --mark 3 -j SNAT --to-source "${ORANGE_ADDRESS}"
	252	fi
	253
7e7495b3	254	# upnp chain for our upnp daemon
c581b670 MT	255	iptables -t nat -N UPNPFW
	256	iptables -t nat -A PREROUTING -j UPNPFW
	257	iptables -N UPNPFW
	258	iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW
3a1019f6	259
6e87f0aa MT	260	# RED chain, used for the red interface
	261	iptables -N REDINPUT
	262	iptables -A INPUT -j REDINPUT
	263	iptables -N REDFORWARD
	264	iptables -A FORWARD -j REDFORWARD
	265	iptables -t nat -N REDNAT
	266	iptables -t nat -A POSTROUTING -j REDNAT
	267
ab4876ad MT	268	# Apply OpenVPN firewall rules
ab4876ad MT	269	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	270
	271	# run wirelessctrl
	272	/usr/local/bin/wirelessctrl
	273
c581b670 MT	274	# POLICY CHAIN
	275	iptables -N POLICYIN
	276	iptables -A INPUT -j POLICYIN
	277	iptables -N POLICYFWD
	278	iptables -A FORWARD -j POLICYFWD
	279	iptables -N POLICYOUT
	280	iptables -A OUTPUT -j POLICYOUT
b324de14	281
bb383423	282	# Initialize firewall policies.
5d7faa45	283	/usr/sbin/firewall-policy
690b0bd7	284
bb383423	285	# Install firewall rules for the red interface.
4b12aa41 TE	286	iptables_red_up
	287
	288	# If red has not been brought up yet, we will
	289	# add the blocking rules for MASQUERADE
	290	if [ ! -e "/var/ipfire/red/active" ]; then
	291	iptables_red_down
	292	fi
ff4770c7	293	}
3a1019f6	294
4b12aa41	295	iptables_red_up() {
c581b670 MT	296	iptables -F REDINPUT
	297	iptables -F REDFORWARD
	298	iptables -t nat -F REDNAT
3a1019f6	299
ff4770c7 AM	300	# PPPoE / PPTP Device
	301	if [ "$IFACE" != "" ]; then
	302	# PPPoE / PPTP
	303	if [ "$DEVICE" != "" ]; then
c581b670	304	iptables -A REDINPUT -i $DEVICE -j ACCEPT
ff4770c7 AM	305	fi
	306	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	307	if [ "$RED_DEV" != "" ]; then
c581b670	308	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
ff4770c7 AM	309	fi
ff4770c7 AM	310	fi
3a1019f6	311	fi
ff4770c7 AM	312
	313	# PPTP over DHCP
	314	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	315	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	316	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	317	fi
3a1019f6 MT	318
ff4770c7 AM	319	# Orange pinholes
	320	if [ "$ORANGE_DEV" != "" ]; then
	321	# This rule enables a host on ORANGE network to connect to the outside
	322	# (only if we have a red connection)
	323	if [ "$IFACE" != "" ]; then
c581b670	324	iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
ff4770c7	325	fi
3a1019f6	326	fi
c400fe4c	327
ff4770c7 AM	328	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	329	# DHCP
	330	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	331	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	332	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	333	fi
ff4770c7 AM	334	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	335	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	336	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	337	fi
	338
	339	# Outgoing masquerading (don't masqerade IPSEC (mark 50))
c581b670	340	iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
c926c637	341
83ef9c40 MT	342	if [ "$IFACE" = "$GREEN_DEV" ]; then
83ef9c40 MT	343	MASQUERADE_GREEN="off"
c926c637	344	fi
c400fe4c	345
983d471f	346	local NO_MASQ_NETWORKS
83ef9c40 MT	347
83ef9c40 MT	348	if [ "${MASQUERADE_GREEN}" = "off" ]; then
983d471f	349	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
83ef9c40 MT	350	fi
	351
	352	if [ "${MASQUERADE_BLUE}" = "off" ]; then
983d471f	353	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
83ef9c40 MT	354	fi
	355
	356	if [ "${MASQUERADE_ORANGE}" = "off" ]; then
983d471f	357	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
83ef9c40 MT	358	fi
83ef9c40 MT	359
983d471f MT	360	local network
	361	for network in ${NO_MASQ_NETWORKS}; do
	362	iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
83ef9c40 MT	363	done
	364
	365	# Masquerade everything else
	366	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
6be0579b	367	fi
66f6b279 MT	368
66f6b279 MT	369	# Reload all rules.
55a5bcae	370	/usr/local/bin/firewallctrl
ff4770c7 AM	371	}
ff4770c7 AM	372
4b12aa41 TE	373	iptables_red_down() {
	374	# Prohibit packets to reach the masquerading rule
	375	# while the wan interface is down - this is required to
	376	# circumvent udp related NAT issues
	377	# http://forum.ipfire.org/index.php?topic=11127.0
e7204c2d MT	378	if [ -n "${IFACE}" ]; then
	379	iptables -F REDFORWARD
	380	iptables -A REDFORWARD -o "${IFACE}" -j DROP
	381	fi
4b12aa41 TE	382
	383	# Reload all rules.
	384	/usr/local/bin/firewallctrl
	385	}
	386
ff4770c7 AM	387	# See how we were called.
	388	case "$1" in
	389	start)
cdb725da MT	390	boot_mesg "Loading firewall modules into the kernel"
	391	modprobe iptable_nat \|\| failed=1
	392	for i in $(find /lib/modules/$(uname -r) -name nf_conntrack*); do
	393	modprobe $(basename $i \| cut -d. -f1) \|\| failed=1
	394	done
	395	for i in $(find /lib/modules/$(uname -r) -name nf_nat*); do
	396	modprobe $(basename $i \| cut -d. -f1) \|\| failed=1
	397	done
	398	(exit ${failed})
	399	evaluate_retval
	400
	401	if [ -e /var/ipfire/main/disable_nf_sip ]; then
	402	rmmod nf_nat_sip
	403	rmmod nf_conntrack_sip
	404	rmmod nf_nat_h323
	405	rmmod nf_conntrack_h323
	406	fi
	407
7d7740a4	408	boot_mesg "Setting up firewall"
ff4770c7	409	iptables_init
7d7740a4	410	evaluate_retval
6be0579b	411	;;
4b12aa41	412	reload\|up)
7d7740a4	413	boot_mesg "Reloading firewall"
4b12aa41	414	iptables_red_up
7d7740a4	415	evaluate_retval
3a1019f6	416	;;
4b12aa41 TE	417	down)
	418	boot_mesg "Disabling firewall access to RED"
	419	iptables_red_down
	420	evaluate_retval
	421	;;
3a1019f6	422	restart)
3a1019f6 MT	423	$0 start
	424	;;
	425	*)
ff4770c7	426	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	427	exit 1
	428	;;
	429	esac
	430
	431	exit 0