[ipfire-2.x.git] / src / initscripts / system / 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 -t raw -F
	iptables -X
	iptables -t nat -X
	iptables -t mangle -X
	iptables -t raw -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 chains
	iptables -N CONNTRACK
	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j DROP
	iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
	iptables -t raw -N CONNTRACK
	iptables -t raw -A PREROUTING -j CONNTRACK

	# Conntrack helpers (https://home.regit.org/netfilter-en/secure-use-of-helpers/)

	# SIP
	if [ "${CONNTRACK_SIP}" = "on" ]; then
		modprobe nf_nat_sip
		iptables -A CONNTRACK -m conntrack --ctstate RELATED \
			-m helper --helper sip -j ACCEPT
		for proto in udp tcp; do
			iptables -t raw -A CONNTRACK -p "${proto}" --dport 5060 -j CT --helper sip
		done
	fi

	# H.323
	if [ "${CONNTRACK_H323}" = "on" ]; then
		modprobe nf_nat_h323
		iptables -A CONNTRACK -m conntrack --ctstate RELATED \
			-m helper --helper h323 -j ACCEPT

		# Gatekeeper RAS
		iptables -t raw -A CONNTRACK -p udp --dport 1719 -j CT --helper RAS

		# Q.931
		iptables -t raw -A CONNTRACK -p tcp --dport 1720 -j CT --helper Q.931
	fi

	# FTP
	if [ "${CONNTRACK_FTP}" = "on" ]; then
		modprobe nf_nat_ftp
		iptables -A CONNTRACK -m conntrack --ctstate RELATED \
			-m helper --helper ftp -p tcp --dport 1024: -j ACCEPT
		iptables -t raw -A CONNTRACK -p tcp --dport 21 -j CT --helper ftp
	fi

	# PPTP
	if [ "${CONNTRACK_PPTP}" = "on" ]; then
		modprobe nf_nat_pptp
		iptables -A CONNTRACK -m conntrack --ctstate RELATED \
			-m helper --helper pptp -j ACCEPT
		iptables -t raw -A CONNTRACK -p tcp --dport 1723 -j CT --helper pptp
	fi

	# TFTP
	if [ "${CONNTRACK_TFTP}" = "on" ]; then
		modprobe nf_nat_tftp
		iptables -A CONNTRACK -m conntrack --ctstate RELATED \
			-m helper --helper tftp -j ACCEPT
		iptables -t raw -A CONNTRACK -p udp --dport 69 -j CT --helper tftp
	fi

	# IRC
	if [ "${CONNTRACK_IRC}" = "on" ]; then
		modprobe nf_nat_irc
		iptables -A CONNTRACK -m conntrack --ctstate RELATED \
			-m helper --helper irc -j ACCEPT
		iptables -t raw -A CONNTRACK -p tcp --dport 6667 -j CT --helper irc
	fi

	# Amanda
	if [ "${CONNTRACK_AMANDA}" = "on" ]; then
		modprobe nf_nat_amanda
		iptables -A CONNTRACK -m conntrack --ctstate RELATED \
			-m helper --helper amanda -j ACCEPT
		iptables -t raw -A CONNTRACK -p tcp -j CT --helper amanda
	fi

	# 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

	# IPS (suricata) chains
	iptables -N IPS
	iptables -A INPUT -j IPS
	iptables -A FORWARD -j IPS
	iptables -A OUTPUT -j IPS

	# Block non-established IPsec networks
	iptables -N IPSECBLOCK
	iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
	iptables -A OUTPUT  -m policy --dir out --pol none -j IPSECBLOCK

	# 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

	# Captive portal
	iptables -N CAPTIVE_PORTAL
	iptables -N CAPTIVE_PORTAL_CLIENTS
	for i in INPUT FORWARD; do
		iptables -A ${i} -j CAPTIVE_PORTAL
	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

	# GeoIP block
	iptables -N GEOIPBLOCK
	iptables -A INPUT -j GEOIPBLOCK
	iptables -A FORWARD -j GEOIPBLOCK

	# 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
	if [ -n "${GREEN_DEV}" ]; then
		iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	fi

	# 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

	# Captive Portal
	iptables -t nat -N CAPTIVE_PORTAL
	iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL

	# 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

	if [ -n "${GREEN_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"
	fi

	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

	# Populate IPsec block chain
	/usr/lib/firewall/ipsec-block

	# 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
			iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
		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 "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
b1109b8a	24	iptables -t raw -F
c581b670 MT	25	iptables -X
	26	iptables -t nat -X
	27	iptables -t mangle -X
b1109b8a	28	iptables -t raw -X
3a1019f6 MT	29
3a1019f6 MT	30	# Set up policies
c581b670 MT	31	iptables -P INPUT DROP
	32	iptables -P FORWARD DROP
	33	iptables -P OUTPUT ACCEPT
3a1019f6 MT	34
3a1019f6 MT	35	# Empty LOG_DROP and LOG_REJECT chains
c581b670 MT	36	iptables -N LOG_DROP
	37	iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
	38	iptables -A LOG_DROP -j DROP
	39	iptables -N LOG_REJECT
	40	iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	41	iptables -A LOG_REJECT -j REJECT
3a1019f6 MT	42
	43	# This chain will log, then DROPs packets with certain bad combinations
	44	# of flags might indicate a port-scan attempt (xmas, null, etc)
c581b670	45	iptables -N PSCAN
5595bc03	46	if [ "$DROPPORTSCAN" == "on" ]; then
c581b670 MT	47	iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
	48	iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
	49	iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
	50	iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	51	fi
c581b670	52	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	53
	54	# New tcp packets without SYN set - could well be an obscure type of port scan
	55	# that's not covered above, may just be a broken windows machine
c581b670	56	iptables -N NEWNOTSYN
5595bc03	57	if [ "$DROPNEWNOTSYN" == "on" ]; then
c581b670	58	iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	59	fi
c581b670	60	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6 MT	61
3a1019f6 MT	62	# Chain to contain all the rules relating to bad TCP flags
c581b670	63	iptables -N BADTCP
3a1019f6	64
c581b670 MT	65	# Don't check loopback
c581b670 MT	66	iptables -A BADTCP -i lo -j RETURN
d8158ca6	67
3a1019f6	68	# Disallow packets frequently used by port-scanners
dccbf1bf AF	69	# NMAP FIN/URG/PSH (XMAS scan)
	70	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	71	# SYN/RST/ACK/FIN/URG
	72	iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
	73	# ALL/ALL
	74	iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
	75	# FIN Stealth
c581b670	76	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
3a1019f6	77	# SYN/RST (also catches xmas variants that set SYN+RST+...)
c581b670	78	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
3a1019f6	79	# SYN/FIN (QueSO or nmap OS probe)
c581b670	80	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
dccbf1bf AF	81	# Null
dccbf1bf AF	82	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
3a1019f6	83	# NEW TCP without SYN
c581b670	84	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
b85d2a98	85
c581b670 MT	86	iptables -A INPUT -p tcp -j BADTCP
c581b670 MT	87	iptables -A FORWARD -p tcp -j BADTCP
c0359d6d	88
b1109b8a	89	# Connection tracking chains
c581b670	90	iptables -N CONNTRACK
b1109b8a	91	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
dccbf1bf	92	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j DROP
0f535060	93	iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
b1109b8a MT	94	iptables -t raw -N CONNTRACK
	95	iptables -t raw -A PREROUTING -j CONNTRACK
	96
	97	# Conntrack helpers (https://home.regit.org/netfilter-en/secure-use-of-helpers/)
	98
	99	# SIP
d57c6162	100	if [ "${CONNTRACK_SIP}" = "on" ]; then
23bb6839	101	modprobe nf_nat_sip
d57c6162 MT	102	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	103	-m helper --helper sip -j ACCEPT
	104	for proto in udp tcp; do
	105	iptables -t raw -A CONNTRACK -p "${proto}" --dport 5060 -j CT --helper sip
	106	done
	107	fi
b1109b8a	108
c8f8bf32 MT	109	# H.323
c8f8bf32 MT	110	if [ "${CONNTRACK_H323}" = "on" ]; then
23bb6839	111	modprobe nf_nat_h323
c8f8bf32 MT	112	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	113	-m helper --helper h323 -j ACCEPT
	114
	115	# Gatekeeper RAS
e2c72362	116	iptables -t raw -A CONNTRACK -p udp --dport 1719 -j CT --helper RAS
c8f8bf32 MT	117
c8f8bf32 MT	118	# Q.931
e2c72362	119	iptables -t raw -A CONNTRACK -p tcp --dport 1720 -j CT --helper Q.931
c8f8bf32 MT	120	fi
c8f8bf32 MT	121
b1109b8a	122	# FTP
d57c6162	123	if [ "${CONNTRACK_FTP}" = "on" ]; then
23bb6839	124	modprobe nf_nat_ftp
d57c6162 MT	125	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	126	-m helper --helper ftp -p tcp --dport 1024: -j ACCEPT
	127	iptables -t raw -A CONNTRACK -p tcp --dport 21 -j CT --helper ftp
	128	fi
b1109b8a MT	129
b1109b8a MT	130	# PPTP
d57c6162	131	if [ "${CONNTRACK_PPTP}" = "on" ]; then
23bb6839	132	modprobe nf_nat_pptp
d57c6162 MT	133	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
d57c6162 MT	134	-m helper --helper pptp -j ACCEPT
8e7c5e65	135	iptables -t raw -A CONNTRACK -p tcp --dport 1723 -j CT --helper pptp
d57c6162	136	fi
b1109b8a MT	137
b1109b8a MT	138	# TFTP
d57c6162	139	if [ "${CONNTRACK_TFTP}" = "on" ]; then
23bb6839	140	modprobe nf_nat_tftp
d57c6162 MT	141	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	142	-m helper --helper tftp -j ACCEPT
	143	iptables -t raw -A CONNTRACK -p udp --dport 69 -j CT --helper tftp
	144	fi
3a1019f6	145
50354ffe MT	146	# IRC
50354ffe MT	147	if [ "${CONNTRACK_IRC}" = "on" ]; then
23bb6839	148	modprobe nf_nat_irc
50354ffe MT	149	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	150	-m helper --helper irc -j ACCEPT
	151	iptables -t raw -A CONNTRACK -p tcp --dport 6667 -j CT --helper irc
	152	fi
	153
a93bf696 MT	154	# Amanda
a93bf696 MT	155	if [ "${CONNTRACK_AMANDA}" = "on" ]; then
23bb6839	156	modprobe nf_nat_amanda
a93bf696 MT	157	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
a93bf696 MT	158	-m helper --helper amanda -j ACCEPT
2c4b9c50	159	iptables -t raw -A CONNTRACK -p tcp -j CT --helper amanda
a93bf696	160	fi
3a1019f6	161
3a1019f6	162	# Fix for braindead ISP's
c581b670	163	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	164
3a1019f6 MT	165	# CUSTOM chains, can be used by the users themselves
c581b670 MT	166	iptables -N CUSTOMINPUT
	167	iptables -A INPUT -j CUSTOMINPUT
	168	iptables -N CUSTOMFORWARD
	169	iptables -A FORWARD -j CUSTOMFORWARD
	170	iptables -N CUSTOMOUTPUT
	171	iptables -A OUTPUT -j CUSTOMOUTPUT
	172	iptables -t nat -N CUSTOMPREROUTING
	173	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	174	iptables -t nat -N CUSTOMPOSTROUTING
	175	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
3a1019f6	176
2a5b19c5 AF	177	# P2PBLOCK
	178	iptables -N P2PBLOCK
	179	iptables -A INPUT -j P2PBLOCK
	180	iptables -A FORWARD -j P2PBLOCK
	181	iptables -A OUTPUT -j P2PBLOCK
	182
815eaff4	183	# Guardian (IPS) chains
c581b670 MT	184	iptables -N GUARDIAN
	185	iptables -A INPUT -j GUARDIAN
	186	iptables -A FORWARD -j GUARDIAN
815eaff4	187
7c82ee61 SS	188	# IPS (suricata) chains
	189	iptables -N IPS
	190	iptables -A INPUT -j IPS
	191	iptables -A FORWARD -j IPS
17c2c09b	192	iptables -A OUTPUT -j IPS
7c82ee61	193
80fbd899 MT	194	# Block non-established IPsec networks
	195	iptables -N IPSECBLOCK
	196	iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
	197	iptables -A OUTPUT -m policy --dir out --pol none -j IPSECBLOCK
	198
1e555330	199	# Block OpenVPN transfer networks
c581b670	200	iptables -N OVPNBLOCK
a0a5c14f	201	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	202	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	203	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	204
51ab1de1	205	# OpenVPN transfer network translation
c581b670 MT	206	iptables -t nat -N OVPNNAT
c581b670 MT	207	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	208
daa1ceba	209	# IPTV chains for IGMPPROXY
c581b670 MT	210	iptables -N IPTVINPUT
	211	iptables -A INPUT -j IPTVINPUT
	212	iptables -N IPTVFORWARD
	213	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	214
8e59a602 MT	215	# Allow to ping the firewall.
	216	iptables -N ICMPINPUT
	217	iptables -A INPUT -j ICMPINPUT
	218	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	219
afc611d4	220	# Accept everything on loopback
c581b670 MT	221	iptables -N LOOPBACK
	222	iptables -A LOOPBACK -i lo -j ACCEPT
	223	iptables -A LOOPBACK -o lo -j ACCEPT
afc611d4	224
3b9a23ce	225	# Filter all packets with loopback addresses on non-loopback interfaces.
c581b670 MT	226	iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
c581b670 MT	227	iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP
3b9a23ce MT	228
3b9a23ce MT	229	for i in INPUT FORWARD OUTPUT; do
c581b670	230	iptables -A ${i} -j LOOPBACK
3b9a23ce	231	done
afc611d4	232
bbaa3613 AM	233	# Captive portal
	234	iptables -N CAPTIVE_PORTAL
	235	iptables -N CAPTIVE_PORTAL_CLIENTS
	236	for i in INPUT FORWARD; do
	237	iptables -A ${i} -j CAPTIVE_PORTAL
	238	done
	239
3a1019f6	240	# Accept everything connected
b85d2a98	241	for i in INPUT FORWARD OUTPUT; do
c581b670	242	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	243	done
b85d2a98 MT	244
8490e496 MT	245	# Allow DHCP
	246	iptables -N DHCPINPUT
	247	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	248	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	249
	250	iptables -N DHCPOUTPUT
	251	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	252	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	253
	254	# Allow DHCP on GREEN
	255	iptables -N DHCPGREENINPUT
	256	iptables -N DHCPGREENOUTPUT
	257	if [ -n "${GREEN_DEV}" ]; then
	258	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	259	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	260	fi
	261
	262	# allow DHCP on BLUE to be turned on/off
	263	iptables -N DHCPBLUEINPUT
	264	iptables -N DHCPBLUEOUTPUT
	265	if [ -n "${BLUE_DEV}" ]; then
	266	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	267	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	268	fi
	269
cab02e2a SS	270	# GeoIP block
	271	iptables -N GEOIPBLOCK
	272	iptables -A INPUT -j GEOIPBLOCK
	273	iptables -A FORWARD -j GEOIPBLOCK
	274
5fd30232	275	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	276	iptables -N IPSECINPUT
	277	iptables -N IPSECFORWARD
	278	iptables -N IPSECOUTPUT
	279	iptables -A INPUT -j IPSECINPUT
	280	iptables -A FORWARD -j IPSECFORWARD
	281	iptables -A OUTPUT -j IPSECOUTPUT
	282	iptables -t nat -N IPSECNAT
	283	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	284
3a1019f6	285	# localhost and ethernet.
c0e0848f MT	286	# Always allow accessing the web GUI from GREEN.
	287	iptables -N GUIINPUT
	288	iptables -A INPUT -j GUIINPUT
48a7737f MT	289	if [ -n "${GREEN_DEV}" ]; then
	290	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	291	fi
8490e496	292
81393987	293	# WIRELESS chains
c581b670 MT	294	iptables -N WIRELESSINPUT
	295	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	296	iptables -N WIRELESSFORWARD
	297	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	298
ab4876ad	299	# OpenVPN
c581b670 MT	300	iptables -N OVPNINPUT
c581b670 MT	301	iptables -A INPUT -j OVPNINPUT
ab4876ad	302
987b75bc	303	# TOR
c581b670 MT	304	iptables -N TOR_INPUT
c581b670 MT	305	iptables -A INPUT -j TOR_INPUT
12dcfbbd	306
d5f1422d	307	# Jump into the actual firewall ruleset.
c581b670 MT	308	iptables -N INPUTFW
c581b670 MT	309	iptables -A INPUT -j INPUTFW
d5f1422d	310
c581b670 MT	311	iptables -N OUTGOINGFW
c581b670 MT	312	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	313
c581b670 MT	314	iptables -N FORWARDFW
c581b670 MT	315	iptables -A FORWARD -j FORWARDFW
d5f1422d	316
fac38614	317	# SNAT rules
c581b670 MT	318	iptables -t nat -N NAT_SOURCE
c581b670 MT	319	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	320
9bb40553 MT	321	# Captive Portal
	322	iptables -t nat -N CAPTIVE_PORTAL
	323	iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
	324
bb12dd7b	325	# Custom prerouting chains (for transparent proxy)
c581b670 MT	326	iptables -t nat -N SQUID
c581b670 MT	327	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	328
bb12dd7b MT	329	# DNAT rules
c581b670 MT	330	iptables -t nat -N NAT_DESTINATION
c581b670 MT	331	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	332	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	333
6e87f0aa MT	334	iptables -t mangle -N NAT_DESTINATION
	335	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	336
	337	iptables -t nat -N NAT_DESTINATION_FIX
	338	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	339
48a7737f MT	340	if [ -n "${GREEN_ADDRESS}" ]; then
	341	iptables -t nat -A NAT_DESTINATION_FIX \
	342	-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"
	343	fi
6e87f0aa MT	344
	345	if [ -n "${BLUE_ADDRESS}" ]; then
	346	iptables -t nat -A NAT_DESTINATION_FIX \
	347	-m mark --mark 2 -j SNAT --to-source "${BLUE_ADDRESS}"
	348	fi
	349
	350	if [ -n "${ORANGE_ADDRESS}" ]; then
	351	iptables -t nat -A NAT_DESTINATION_FIX \
	352	-m mark --mark 3 -j SNAT --to-source "${ORANGE_ADDRESS}"
	353	fi
	354
7e7495b3	355	# upnp chain for our upnp daemon
c581b670 MT	356	iptables -t nat -N UPNPFW
	357	iptables -t nat -A PREROUTING -j UPNPFW
	358	iptables -N UPNPFW
	359	iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW
3a1019f6	360
6e87f0aa MT	361	# RED chain, used for the red interface
	362	iptables -N REDINPUT
	363	iptables -A INPUT -j REDINPUT
	364	iptables -N REDFORWARD
	365	iptables -A FORWARD -j REDFORWARD
	366	iptables -t nat -N REDNAT
	367	iptables -t nat -A POSTROUTING -j REDNAT
	368
80fbd899 MT	369	# Populate IPsec block chain
	370	/usr/lib/firewall/ipsec-block
	371
ab4876ad MT	372	# Apply OpenVPN firewall rules
ab4876ad MT	373	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	374
	375	# run wirelessctrl
	376	/usr/local/bin/wirelessctrl
	377
c581b670 MT	378	# POLICY CHAIN
	379	iptables -N POLICYIN
	380	iptables -A INPUT -j POLICYIN
	381	iptables -N POLICYFWD
	382	iptables -A FORWARD -j POLICYFWD
	383	iptables -N POLICYOUT
	384	iptables -A OUTPUT -j POLICYOUT
b324de14	385
bb383423	386	# Initialize firewall policies.
5d7faa45	387	/usr/sbin/firewall-policy
690b0bd7	388
bb383423	389	# Install firewall rules for the red interface.
4b12aa41 TE	390	iptables_red_up
	391
	392	# If red has not been brought up yet, we will
	393	# add the blocking rules for MASQUERADE
	394	if [ ! -e "/var/ipfire/red/active" ]; then
	395	iptables_red_down
	396	fi
ff4770c7	397	}
3a1019f6	398
4b12aa41	399	iptables_red_up() {
c581b670 MT	400	iptables -F REDINPUT
	401	iptables -F REDFORWARD
	402	iptables -t nat -F REDNAT
3a1019f6	403
ff4770c7 AM	404	# PPPoE / PPTP Device
	405	if [ "$IFACE" != "" ]; then
	406	# PPPoE / PPTP
	407	if [ "$DEVICE" != "" ]; then
c581b670	408	iptables -A REDINPUT -i $DEVICE -j ACCEPT
ff4770c7 AM	409	fi
	410	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	411	if [ "$RED_DEV" != "" ]; then
c581b670	412	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
ff4770c7 AM	413	fi
ff4770c7 AM	414	fi
3a1019f6	415	fi
ff4770c7 AM	416
	417	# PPTP over DHCP
	418	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	419	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	420	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	421	fi
3a1019f6 MT	422
ff4770c7 AM	423	# Orange pinholes
	424	if [ "$ORANGE_DEV" != "" ]; then
	425	# This rule enables a host on ORANGE network to connect to the outside
	426	# (only if we have a red connection)
	427	if [ "$IFACE" != "" ]; then
c581b670	428	iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
ff4770c7	429	fi
3a1019f6	430	fi
c400fe4c	431
ff4770c7 AM	432	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	433	# DHCP
	434	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	435	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	436	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	437	fi
ff4770c7 AM	438	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	439	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	440	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	441	fi
	442
	443	# Outgoing masquerading (don't masqerade IPSEC (mark 50))
c581b670	444	iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
c926c637	445
60fcb241 AF	446	if [ "${IFACE}" = "${GREEN_DEV}" ]; then
60fcb241 AF	447	iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
c926c637	448	fi
c400fe4c	449
983d471f	450	local NO_MASQ_NETWORKS
83ef9c40 MT	451
83ef9c40 MT	452	if [ "${MASQUERADE_GREEN}" = "off" ]; then
983d471f	453	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
83ef9c40 MT	454	fi
	455
	456	if [ "${MASQUERADE_BLUE}" = "off" ]; then
983d471f	457	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
83ef9c40 MT	458	fi
	459
	460	if [ "${MASQUERADE_ORANGE}" = "off" ]; then
983d471f	461	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
83ef9c40 MT	462	fi
83ef9c40 MT	463
983d471f MT	464	local network
	465	for network in ${NO_MASQ_NETWORKS}; do
	466	iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
83ef9c40 MT	467	done
	468
	469	# Masquerade everything else
	470	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
6be0579b	471	fi
66f6b279 MT	472
66f6b279 MT	473	# Reload all rules.
55a5bcae	474	/usr/local/bin/firewallctrl
ff4770c7 AM	475	}
ff4770c7 AM	476
4b12aa41 TE	477	iptables_red_down() {
	478	# Prohibit packets to reach the masquerading rule
	479	# while the wan interface is down - this is required to
	480	# circumvent udp related NAT issues
	481	# http://forum.ipfire.org/index.php?topic=11127.0
e7204c2d MT	482	if [ -n "${IFACE}" ]; then
	483	iptables -F REDFORWARD
	484	iptables -A REDFORWARD -o "${IFACE}" -j DROP
	485	fi
4b12aa41 TE	486
	487	# Reload all rules.
	488	/usr/local/bin/firewallctrl
	489	}
	490
ff4770c7 AM	491	# See how we were called.
	492	case "$1" in
	493	start)
7d7740a4	494	boot_mesg "Setting up firewall"
ff4770c7	495	iptables_init
7d7740a4	496	evaluate_retval
6be0579b	497	;;
4b12aa41	498	reload\|up)
7d7740a4	499	boot_mesg "Reloading firewall"
4b12aa41	500	iptables_red_up
7d7740a4	501	evaluate_retval
3a1019f6	502	;;
4b12aa41 TE	503	down)
	504	boot_mesg "Disabling firewall access to RED"
	505	iptables_red_down
	506	evaluate_retval
	507	;;
3a1019f6	508	restart)
3a1019f6 MT	509	$0 start
	510	;;
	511	*)
ff4770c7	512	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	513	exit 1
	514	;;
	515	esac
	516
	517	exit 0