[people/pmueller/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/second -j LOG
	iptables -A LOG_DROP   -j DROP
	iptables -N LOG_REJECT
	iptables -A LOG_REJECT -m limit --limit 10/second -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/second -j LOG --log-prefix "DROP_TCP Scan "  -m comment --comment "DROP_TCP PScan"
		iptables -A PSCAN -p udp  -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan "  -m comment --comment "DROP_UDP PScan"
		iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
		iptables -A PSCAN -f      -m limit --limit 10/second -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/second -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/)

	# GRE (always enabled)
	modprobe nf_conntrack_proto_gre

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

	# 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

	# IPS (Suricata) chains
	iptables -N IPS_INPUT
	iptables -N IPS_FORWARD
	iptables -N IPS_OUTPUT
	iptables -A INPUT -j IPS_INPUT
	iptables -A FORWARD -j IPS_FORWARD
	iptables -A OUTPUT -j IPS_OUTPUT

	# 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 (inbound and outbound)
	iptables -N TOR_INPUT
	iptables -A INPUT -j TOR_INPUT
	iptables -N TOR_OUTPUT
	iptables -A OUTPUT -j TOR_OUTPUT
	
	# 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 chains
	/usr/lib/firewall/ipsec-policy

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

	# run wirelessctrl
	/usr/local/bin/wirelessctrl

	# run captivectrl
	/usr/local/bin/captivectrl

	# 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

	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	36	iptables -N LOG_DROP
8ee3a135	37	iptables -A LOG_DROP -m limit --limit 10/second -j LOG
c581b670 MT	38	iptables -A LOG_DROP -j DROP
c581b670 MT	39	iptables -N LOG_REJECT
8ee3a135	40	iptables -A LOG_REJECT -m limit --limit 10/second -j LOG
c581b670	41	iptables -A LOG_REJECT -j REJECT
3a1019f6 MT	42
3a1019f6 MT	43	# This chain will log, then DROPs packets with certain bad combinations
ef7e9e52	44	# of flags might indicate a port-scan attempt (xmas, null, etc.)
c581b670	45	iptables -N PSCAN
5595bc03	46	if [ "$DROPPORTSCAN" == "on" ]; then
ef7e9e52 PM	47	iptables -A PSCAN -p tcp -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
ef7e9e52 PM	48	iptables -A PSCAN -p udp -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
8ee3a135 PM	49	iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
8ee3a135 PM	50	iptables -A PSCAN -f -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	51	fi
c581b670	52	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	53
3a1019f6 MT	54	# New tcp packets without SYN set - could well be an obscure type of port scan
ef7e9e52	55	# that's not covered above, may just be a broken Windows machine
c581b670	56	iptables -N NEWNOTSYN
5595bc03	57	if [ "$DROPNEWNOTSYN" == "on" ]; then
8ee3a135	58	iptables -A NEWNOTSYN -m limit --limit 10/second -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
a5a0c8a5 MT	99	# GRE (always enabled)
	100	modprobe nf_conntrack_proto_gre
	101
b1109b8a	102	# SIP
d57c6162	103	if [ "${CONNTRACK_SIP}" = "on" ]; then
23bb6839	104	modprobe nf_nat_sip
d57c6162 MT	105	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	106	-m helper --helper sip -j ACCEPT
	107	for proto in udp tcp; do
	108	iptables -t raw -A CONNTRACK -p "${proto}" --dport 5060 -j CT --helper sip
	109	done
	110	fi
b1109b8a	111
c8f8bf32 MT	112	# H.323
c8f8bf32 MT	113	if [ "${CONNTRACK_H323}" = "on" ]; then
23bb6839	114	modprobe nf_nat_h323
c8f8bf32 MT	115	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	116	-m helper --helper h323 -j ACCEPT
	117
	118	# Gatekeeper RAS
e2c72362	119	iptables -t raw -A CONNTRACK -p udp --dport 1719 -j CT --helper RAS
c8f8bf32 MT	120
c8f8bf32 MT	121	# Q.931
e2c72362	122	iptables -t raw -A CONNTRACK -p tcp --dport 1720 -j CT --helper Q.931
c8f8bf32 MT	123	fi
c8f8bf32 MT	124
b1109b8a	125	# FTP
d57c6162	126	if [ "${CONNTRACK_FTP}" = "on" ]; then
23bb6839	127	modprobe nf_nat_ftp
d57c6162 MT	128	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	129	-m helper --helper ftp -p tcp --dport 1024: -j ACCEPT
	130	iptables -t raw -A CONNTRACK -p tcp --dport 21 -j CT --helper ftp
	131	fi
b1109b8a MT	132
b1109b8a MT	133	# PPTP
d57c6162	134	if [ "${CONNTRACK_PPTP}" = "on" ]; then
23bb6839	135	modprobe nf_nat_pptp
d57c6162 MT	136	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
d57c6162 MT	137	-m helper --helper pptp -j ACCEPT
8e7c5e65	138	iptables -t raw -A CONNTRACK -p tcp --dport 1723 -j CT --helper pptp
d57c6162	139	fi
b1109b8a MT	140
b1109b8a MT	141	# TFTP
d57c6162	142	if [ "${CONNTRACK_TFTP}" = "on" ]; then
23bb6839	143	modprobe nf_nat_tftp
d57c6162 MT	144	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	145	-m helper --helper tftp -j ACCEPT
	146	iptables -t raw -A CONNTRACK -p udp --dport 69 -j CT --helper tftp
	147	fi
3a1019f6	148
50354ffe MT	149	# IRC
50354ffe MT	150	if [ "${CONNTRACK_IRC}" = "on" ]; then
23bb6839	151	modprobe nf_nat_irc
50354ffe MT	152	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
	153	-m helper --helper irc -j ACCEPT
	154	iptables -t raw -A CONNTRACK -p tcp --dport 6667 -j CT --helper irc
	155	fi
	156
a93bf696 MT	157	# Amanda
a93bf696 MT	158	if [ "${CONNTRACK_AMANDA}" = "on" ]; then
23bb6839	159	modprobe nf_nat_amanda
a93bf696 MT	160	iptables -A CONNTRACK -m conntrack --ctstate RELATED \
a93bf696 MT	161	-m helper --helper amanda -j ACCEPT
2c4b9c50	162	iptables -t raw -A CONNTRACK -p tcp -j CT --helper amanda
a93bf696	163	fi
3a1019f6	164
ef7e9e52	165	# Fix for braindead ISPs
c581b670	166	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	167
3a1019f6 MT	168	# CUSTOM chains, can be used by the users themselves
c581b670 MT	169	iptables -N CUSTOMINPUT
	170	iptables -A INPUT -j CUSTOMINPUT
	171	iptables -N CUSTOMFORWARD
	172	iptables -A FORWARD -j CUSTOMFORWARD
	173	iptables -N CUSTOMOUTPUT
	174	iptables -A OUTPUT -j CUSTOMOUTPUT
	175	iptables -t nat -N CUSTOMPREROUTING
	176	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	177	iptables -t nat -N CUSTOMPOSTROUTING
	178	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
3a1019f6	179
2a5b19c5 AF	180	# P2PBLOCK
	181	iptables -N P2PBLOCK
	182	iptables -A INPUT -j P2PBLOCK
	183	iptables -A FORWARD -j P2PBLOCK
	184	iptables -A OUTPUT -j P2PBLOCK
	185
ef7e9e52	186	# IPS (Guardian) chains
c581b670 MT	187	iptables -N GUARDIAN
	188	iptables -A INPUT -j GUARDIAN
	189	iptables -A FORWARD -j GUARDIAN
815eaff4	190
80fbd899 MT	191	# Block non-established IPsec networks
	192	iptables -N IPSECBLOCK
	193	iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
	194	iptables -A OUTPUT -m policy --dir out --pol none -j IPSECBLOCK
	195
1e555330	196	# Block OpenVPN transfer networks
c581b670	197	iptables -N OVPNBLOCK
a0a5c14f	198	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	199	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	200	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	201
ef7e9e52	202	# IPS (Suricata) chains
5dba8382 PM	203	iptables -N IPS_INPUT
	204	iptables -N IPS_FORWARD
	205	iptables -N IPS_OUTPUT
	206	iptables -A INPUT -j IPS_INPUT
	207	iptables -A FORWARD -j IPS_FORWARD
	208	iptables -A OUTPUT -j IPS_OUTPUT
	209
51ab1de1	210	# OpenVPN transfer network translation
c581b670 MT	211	iptables -t nat -N OVPNNAT
c581b670 MT	212	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	213
daa1ceba	214	# IPTV chains for IGMPPROXY
c581b670 MT	215	iptables -N IPTVINPUT
	216	iptables -A INPUT -j IPTVINPUT
	217	iptables -N IPTVFORWARD
	218	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	219
8e59a602 MT	220	# Allow to ping the firewall.
	221	iptables -N ICMPINPUT
	222	iptables -A INPUT -j ICMPINPUT
	223	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	224
afc611d4	225	# Accept everything on loopback
c581b670 MT	226	iptables -N LOOPBACK
	227	iptables -A LOOPBACK -i lo -j ACCEPT
	228	iptables -A LOOPBACK -o lo -j ACCEPT
afc611d4	229
3b9a23ce	230	# Filter all packets with loopback addresses on non-loopback interfaces.
c581b670 MT	231	iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
c581b670 MT	232	iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP
3b9a23ce MT	233
3b9a23ce MT	234	for i in INPUT FORWARD OUTPUT; do
c581b670	235	iptables -A ${i} -j LOOPBACK
3b9a23ce	236	done
afc611d4	237
bbaa3613 AM	238	# Captive portal
	239	iptables -N CAPTIVE_PORTAL
	240	iptables -N CAPTIVE_PORTAL_CLIENTS
	241	for i in INPUT FORWARD; do
	242	iptables -A ${i} -j CAPTIVE_PORTAL
	243	done
	244
3a1019f6	245	# Accept everything connected
b85d2a98	246	for i in INPUT FORWARD OUTPUT; do
c581b670	247	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	248	done
b85d2a98 MT	249
8490e496 MT	250	# Allow DHCP
	251	iptables -N DHCPINPUT
	252	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	253	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	254
	255	iptables -N DHCPOUTPUT
	256	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	257	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	258
	259	# Allow DHCP on GREEN
	260	iptables -N DHCPGREENINPUT
	261	iptables -N DHCPGREENOUTPUT
	262	if [ -n "${GREEN_DEV}" ]; then
	263	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	264	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	265	fi
	266
ef7e9e52	267	# Allow DHCP on BLUE to be turned on/off
8490e496 MT	268	iptables -N DHCPBLUEINPUT
	269	iptables -N DHCPBLUEOUTPUT
	270	if [ -n "${BLUE_DEV}" ]; then
	271	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	272	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	273	fi
	274
cab02e2a SS	275	# GeoIP block
	276	iptables -N GEOIPBLOCK
	277	iptables -A INPUT -j GEOIPBLOCK
	278	iptables -A FORWARD -j GEOIPBLOCK
	279
5fd30232	280	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	281	iptables -N IPSECINPUT
	282	iptables -N IPSECFORWARD
	283	iptables -N IPSECOUTPUT
	284	iptables -A INPUT -j IPSECINPUT
	285	iptables -A FORWARD -j IPSECFORWARD
	286	iptables -A OUTPUT -j IPSECOUTPUT
	287	iptables -t nat -N IPSECNAT
	288	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	289
3a1019f6	290	# localhost and ethernet.
c0e0848f MT	291	# Always allow accessing the web GUI from GREEN.
	292	iptables -N GUIINPUT
	293	iptables -A INPUT -j GUIINPUT
48a7737f MT	294	if [ -n "${GREEN_DEV}" ]; then
	295	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	296	fi
8490e496	297
81393987	298	# WIRELESS chains
c581b670 MT	299	iptables -N WIRELESSINPUT
	300	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	301	iptables -N WIRELESSFORWARD
	302	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	303
ab4876ad	304	# OpenVPN
c581b670 MT	305	iptables -N OVPNINPUT
c581b670 MT	306	iptables -A INPUT -j OVPNINPUT
ab4876ad	307
5fc5f703	308	# Tor (inbound and outbound)
c581b670 MT	309	iptables -N TOR_INPUT
c581b670 MT	310	iptables -A INPUT -j TOR_INPUT
5fc5f703 PM	311	iptables -N TOR_OUTPUT
5fc5f703 PM	312	iptables -A OUTPUT -j TOR_OUTPUT
12dcfbbd	313
d5f1422d	314	# Jump into the actual firewall ruleset.
c581b670 MT	315	iptables -N INPUTFW
c581b670 MT	316	iptables -A INPUT -j INPUTFW
d5f1422d	317
c581b670 MT	318	iptables -N OUTGOINGFW
c581b670 MT	319	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	320
c581b670 MT	321	iptables -N FORWARDFW
c581b670 MT	322	iptables -A FORWARD -j FORWARDFW
d5f1422d	323
fac38614	324	# SNAT rules
c581b670 MT	325	iptables -t nat -N NAT_SOURCE
c581b670 MT	326	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	327
9bb40553 MT	328	# Captive Portal
	329	iptables -t nat -N CAPTIVE_PORTAL
	330	iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
	331
bb12dd7b	332	# Custom prerouting chains (for transparent proxy)
c581b670 MT	333	iptables -t nat -N SQUID
c581b670 MT	334	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	335
bb12dd7b MT	336	# DNAT rules
c581b670 MT	337	iptables -t nat -N NAT_DESTINATION
c581b670 MT	338	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	339	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	340
6e87f0aa MT	341	iptables -t mangle -N NAT_DESTINATION
	342	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	343
	344	iptables -t nat -N NAT_DESTINATION_FIX
	345	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	346
48a7737f MT	347	if [ -n "${GREEN_ADDRESS}" ]; then
	348	iptables -t nat -A NAT_DESTINATION_FIX \
	349	-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"
	350	fi
6e87f0aa MT	351
	352	if [ -n "${BLUE_ADDRESS}" ]; then
	353	iptables -t nat -A NAT_DESTINATION_FIX \
	354	-m mark --mark 2 -j SNAT --to-source "${BLUE_ADDRESS}"
	355	fi
	356
	357	if [ -n "${ORANGE_ADDRESS}" ]; then
	358	iptables -t nat -A NAT_DESTINATION_FIX \
	359	-m mark --mark 3 -j SNAT --to-source "${ORANGE_ADDRESS}"
	360	fi
	361
7e7495b3	362	# upnp chain for our upnp daemon
c581b670 MT	363	iptables -t nat -N UPNPFW
	364	iptables -t nat -A PREROUTING -j UPNPFW
	365	iptables -N UPNPFW
	366	iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW
3a1019f6	367
6e87f0aa MT	368	# RED chain, used for the red interface
	369	iptables -N REDINPUT
	370	iptables -A INPUT -j REDINPUT
	371	iptables -N REDFORWARD
	372	iptables -A FORWARD -j REDFORWARD
	373	iptables -t nat -N REDNAT
	374	iptables -t nat -A POSTROUTING -j REDNAT
	375
6c920b19 MT	376	# Populate IPsec chains
6c920b19 MT	377	/usr/lib/firewall/ipsec-policy
80fbd899	378
ab4876ad MT	379	# Apply OpenVPN firewall rules
ab4876ad MT	380	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	381
	382	# run wirelessctrl
	383	/usr/local/bin/wirelessctrl
	384
1722701a AM	385	# run captivectrl
	386	/usr/local/bin/captivectrl
	387
c581b670 MT	388	# POLICY CHAIN
	389	iptables -N POLICYIN
	390	iptables -A INPUT -j POLICYIN
	391	iptables -N POLICYFWD
	392	iptables -A FORWARD -j POLICYFWD
	393	iptables -N POLICYOUT
	394	iptables -A OUTPUT -j POLICYOUT
b324de14	395
bb383423	396	# Initialize firewall policies.
5d7faa45	397	/usr/sbin/firewall-policy
690b0bd7	398
bb383423	399	# Install firewall rules for the red interface.
4b12aa41 TE	400	iptables_red_up
	401
	402	# If red has not been brought up yet, we will
	403	# add the blocking rules for MASQUERADE
	404	if [ ! -e "/var/ipfire/red/active" ]; then
	405	iptables_red_down
	406	fi
ff4770c7	407	}
3a1019f6	408
4b12aa41	409	iptables_red_up() {
c581b670 MT	410	iptables -F REDINPUT
	411	iptables -F REDFORWARD
	412	iptables -t nat -F REDNAT
3a1019f6	413
ff4770c7 AM	414	# PPPoE / PPTP Device
	415	if [ "$IFACE" != "" ]; then
	416	# PPPoE / PPTP
	417	if [ "$DEVICE" != "" ]; then
c581b670	418	iptables -A REDINPUT -i $DEVICE -j ACCEPT
ff4770c7 AM	419	fi
	420	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	421	if [ "$RED_DEV" != "" ]; then
c581b670	422	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
ff4770c7 AM	423	fi
ff4770c7 AM	424	fi
3a1019f6	425	fi
ff4770c7 AM	426
	427	# PPTP over DHCP
	428	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	429	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	430	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	431	fi
3a1019f6 MT	432
ff4770c7 AM	433	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	434	# DHCP
	435	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	436	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	437	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	438	fi
ff4770c7 AM	439	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	440	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	441	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	442	fi
ff4770c7 AM	443
ef7e9e52	444	# Outgoing masquerading (don't masqerade IPsec (mark 50))
c581b670	445	iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
c926c637	446
60fcb241 AF	447	if [ "${IFACE}" = "${GREEN_DEV}" ]; then
60fcb241 AF	448	iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
c926c637	449	fi
c400fe4c	450
983d471f	451	local NO_MASQ_NETWORKS
83ef9c40 MT	452
83ef9c40 MT	453	if [ "${MASQUERADE_GREEN}" = "off" ]; then
983d471f	454	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
83ef9c40 MT	455	fi
	456
	457	if [ "${MASQUERADE_BLUE}" = "off" ]; then
983d471f	458	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
83ef9c40 MT	459	fi
	460
	461	if [ "${MASQUERADE_ORANGE}" = "off" ]; then
983d471f	462	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
83ef9c40 MT	463	fi
83ef9c40 MT	464
983d471f MT	465	local network
	466	for network in ${NO_MASQ_NETWORKS}; do
	467	iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
83ef9c40 MT	468	done
	469
	470	# Masquerade everything else
	471	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
6be0579b	472	fi
66f6b279 MT	473
66f6b279 MT	474	# Reload all rules.
55a5bcae	475	/usr/local/bin/firewallctrl
ff4770c7 AM	476	}
ff4770c7 AM	477
4b12aa41 TE	478	iptables_red_down() {
4b12aa41 TE	479	# Prohibit packets to reach the masquerading rule
e01e07ec	480	# while the WAN interface is down - this is required to
4b12aa41 TE	481	# circumvent udp related NAT issues
4b12aa41 TE	482	# http://forum.ipfire.org/index.php?topic=11127.0
e7204c2d MT	483	if [ -n "${IFACE}" ]; then
	484	iptables -F REDFORWARD
	485	iptables -A REDFORWARD -o "${IFACE}" -j DROP
	486	fi
4b12aa41 TE	487
	488	# Reload all rules.
	489	/usr/local/bin/firewallctrl
	490	}
	491
ff4770c7 AM	492	# See how we were called.
	493	case "$1" in
	494	start)
7d7740a4	495	boot_mesg "Setting up firewall"
ff4770c7	496	iptables_init
7d7740a4	497	evaluate_retval
6be0579b	498	;;
4b12aa41	499	reload\|up)
7d7740a4	500	boot_mesg "Reloading firewall"
4b12aa41	501	iptables_red_up
7d7740a4	502	evaluate_retval
3a1019f6	503	;;
4b12aa41 TE	504	down)
	505	boot_mesg "Disabling firewall access to RED"
	506	iptables_red_down
	507	evaluate_retval
	508	;;
3a1019f6	509	restart)
3a1019f6 MT	510	$0 start
	511	;;
	512	*)
ff4770c7	513	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	514	exit 1
	515	;;
	516	esac
	517
	518	exit 0