[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

NAT_MASK="0x0f000000"

IPS_REPEAT_MARK="0x80000000"
IPS_REPEAT_MASK="0x80000000"
IPS_BYPASS_MARK="0x40000000"
IPS_BYPASS_MASK="0x40000000"

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

	# Ensure the xt_geoip module is always loaded (#12767)
	modprobe xt_geoip

	# Enable TRACE logging to syslog
	modprobe nf_log_ipv4
	sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4

	# IPS Bypass Chain which stores the BYPASS bit in connection tracking
	iptables -N IPSBYPASS
	iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))"

	# Jump into bypass chain when the BYPASS bit is set
	for chain in INPUT FORWARD OUTPUT; do
		iptables -A "${chain}" -m mark \
			--mark "$(( IPS_REPEAT_MARK | IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j IPSBYPASS
	done

	# 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"

	# Log and subsequently drop spoofed packets or "martians", arriving from sources
	# on interfaces where we don't expect them
	iptables -N SPOOFED_MARTIAN
	if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then
		iptables -A SPOOFED_MARTIAN  -m limit --limit 10/second -j LOG  --log-prefix "DROP_SPOOFED_MARTIAN "
	fi
	iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN"

	# 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 LOG_DROP
	iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT

	# Restore any connection marks
	iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark

	# 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

	# Log and drop any traffic from and to networks known as being hostile, posing
	# a technical threat to our users (i. e. listed at Spamhaus DROP et al.)
	iptables -N HOSTILE
	if [ "$DROPHOSTILE" == "on" ]; then
		iptables -A HOSTILE -m limit --limit 10/second -j LOG  --log-prefix "DROP_HOSTILE "
		iptables -A INPUT   -i $IFACE -m geoip --src-cc XD -j HOSTILE
		iptables -A FORWARD -i $IFACE -m geoip --src-cc XD -j HOSTILE
		iptables -A FORWARD -o $IFACE -m geoip --dst-cc XD -j HOSTILE
		iptables -A OUTPUT  -o $IFACE -m geoip --src-cc XD -j HOSTILE
	fi
	iptables -A HOSTILE -j DROP -m comment --comment "DROP_HOSTILE"

	# 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

	for chain in INPUT FORWARD OUTPUT; do
		iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j "IPS_${chain}"
	done

	# 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 if source/destination is loopback space...
	iptables -N LOOPBACK
	iptables -A LOOPBACK -i lo -s 127.0.0.0/8 -j ACCEPT
	iptables -A LOOPBACK -o lo -d 127.0.0.0/8 -j ACCEPT

	# ... and drop everything else on the loopback interface, since no other traffic should appear there
	iptables -A LOOPBACK -i lo -j SPOOFED_MARTIAN
	iptables -A LOOPBACK -o lo -j SPOOFED_MARTIAN

	# Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
	iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
	iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN

	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

	# Tor (inbound)
	iptables -N TOR_INPUT
	iptables -A INPUT -j TOR_INPUT

	# Location Block
	iptables -N LOCATIONBLOCK
	iptables -A INPUT -j LOCATIONBLOCK
	iptables -A FORWARD -j LOCATIONBLOCK

	# 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 (outbound)
	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 "${GREEN_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
	fi

	if [ -n "${BLUE_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
	fi

	if [ -n "${ORANGE_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
	fi

	# 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

	# Prohibit spoofing our own IP address on RED
	if [ -f /var/ipfire/red/active ]; then
		REDIP="$( cat /var/ipfire/red/local-ipaddress )";

		if [ "$IFACE" != "" ]; then
			iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
		elif [ "$DEVICE" != "" ]; then
			iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
		fi
	fi

	# 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)
		iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -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 $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
3a1019f6 MT	9	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
	10
	11	if [ -f /var/ipfire/red/device ]; then
	12	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	13	fi
	14
ce31144c MT	15	NAT_MASK="0x0f000000"
ce31144c MT	16
3fa8300e MT	17	IPS_REPEAT_MARK="0x80000000"
	18	IPS_REPEAT_MASK="0x80000000"
	19	IPS_BYPASS_MARK="0x40000000"
	20	IPS_BYPASS_MASK="0x40000000"
	21
c581b670 MT	22	function iptables() {
	23	/sbin/iptables --wait "$@"
	24	}
	25
3a1019f6 MT	26	iptables_init() {
3a1019f6 MT	27	# Flush all rules and delete all custom chains
c581b670 MT	28	iptables -F
	29	iptables -t nat -F
	30	iptables -t mangle -F
b1109b8a	31	iptables -t raw -F
c581b670 MT	32	iptables -X
	33	iptables -t nat -X
	34	iptables -t mangle -X
b1109b8a	35	iptables -t raw -X
3a1019f6 MT	36
3a1019f6 MT	37	# Set up policies
c581b670 MT	38	iptables -P INPUT DROP
	39	iptables -P FORWARD DROP
	40	iptables -P OUTPUT ACCEPT
3a1019f6	41
816b0e08 PM	42	# Ensure the xt_geoip module is always loaded (#12767)
	43	modprobe xt_geoip
	44
78b65ea7 MT	45	# Enable TRACE logging to syslog
	46	modprobe nf_log_ipv4
	47	sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4
	48
3fa8300e MT	49	# IPS Bypass Chain which stores the BYPASS bit in connection tracking
3fa8300e MT	50	iptables -N IPSBYPASS
19357bc5	51	iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))"
3fa8300e MT	52
	53	# Jump into bypass chain when the BYPASS bit is set
	54	for chain in INPUT FORWARD OUTPUT; do
	55	iptables -A "${chain}" -m mark \
	56	--mark "$(( IPS_REPEAT_MARK \| IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j IPSBYPASS
	57	done
	58
3a1019f6	59	# Empty LOG_DROP and LOG_REJECT chains
c581b670	60	iptables -N LOG_DROP
8ee3a135	61	iptables -A LOG_DROP -m limit --limit 10/second -j LOG
c581b670 MT	62	iptables -A LOG_DROP -j DROP
c581b670 MT	63	iptables -N LOG_REJECT
8ee3a135	64	iptables -A LOG_REJECT -m limit --limit 10/second -j LOG
c581b670	65	iptables -A LOG_REJECT -j REJECT
3a1019f6 MT	66
3a1019f6 MT	67	# This chain will log, then DROPs packets with certain bad combinations
ef7e9e52	68	# of flags might indicate a port-scan attempt (xmas, null, etc.)
c581b670	69	iptables -N PSCAN
5595bc03	70	if [ "$DROPPORTSCAN" == "on" ]; then
ef7e9e52 PM	71	iptables -A PSCAN -p tcp -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
ef7e9e52 PM	72	iptables -A PSCAN -p udp -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
8ee3a135 PM	73	iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
8ee3a135 PM	74	iptables -A PSCAN -f -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	75	fi
c581b670	76	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	77
3a1019f6 MT	78	# New tcp packets without SYN set - could well be an obscure type of port scan
ef7e9e52	79	# that's not covered above, may just be a broken Windows machine
c581b670	80	iptables -N NEWNOTSYN
5595bc03	81	if [ "$DROPNEWNOTSYN" == "on" ]; then
8ee3a135	82	iptables -A NEWNOTSYN -m limit --limit 10/second -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	83	fi
c581b670	84	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6	85
a36cd34e PM	86	# Log and subsequently drop spoofed packets or "martians", arriving from sources
	87	# on interfaces where we don't expect them
	88	iptables -N SPOOFED_MARTIAN
	89	if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then
	90	iptables -A SPOOFED_MARTIAN -m limit --limit 10/second -j LOG --log-prefix "DROP_SPOOFED_MARTIAN "
	91	fi
	92	iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN"
	93
3a1019f6	94	# Chain to contain all the rules relating to bad TCP flags
c581b670	95	iptables -N BADTCP
3a1019f6	96
c581b670 MT	97	# Don't check loopback
c581b670 MT	98	iptables -A BADTCP -i lo -j RETURN
d8158ca6	99
3a1019f6	100	# Disallow packets frequently used by port-scanners
dccbf1bf AF	101	# NMAP FIN/URG/PSH (XMAS scan)
	102	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	103	# SYN/RST/ACK/FIN/URG
	104	iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
	105	# ALL/ALL
	106	iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
	107	# FIN Stealth
c581b670	108	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
3a1019f6	109	# SYN/RST (also catches xmas variants that set SYN+RST+...)
c581b670	110	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
3a1019f6	111	# SYN/FIN (QueSO or nmap OS probe)
c581b670	112	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
dccbf1bf AF	113	# Null
dccbf1bf AF	114	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
3a1019f6	115	# NEW TCP without SYN
c581b670	116	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
b85d2a98	117
c581b670 MT	118	iptables -A INPUT -p tcp -j BADTCP
c581b670 MT	119	iptables -A FORWARD -p tcp -j BADTCP
c0359d6d	120
b1109b8a	121	# Connection tracking chains
c581b670	122	iptables -N CONNTRACK
b1109b8a	123	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
0e7bfb13	124	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j LOG_DROP
0f535060	125	iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
b1109b8a	126
c825fcef MT	127	# Restore any connection marks
	128	iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
	129
ef7e9e52	130	# Fix for braindead ISPs
c581b670	131	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	132
3a1019f6 MT	133	# CUSTOM chains, can be used by the users themselves
c581b670 MT	134	iptables -N CUSTOMINPUT
	135	iptables -A INPUT -j CUSTOMINPUT
	136	iptables -N CUSTOMFORWARD
	137	iptables -A FORWARD -j CUSTOMFORWARD
	138	iptables -N CUSTOMOUTPUT
	139	iptables -A OUTPUT -j CUSTOMOUTPUT
	140	iptables -t nat -N CUSTOMPREROUTING
	141	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	142	iptables -t nat -N CUSTOMPOSTROUTING
	143	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
3a1019f6	144
97154d05 PM	145	# Log and drop any traffic from and to networks known as being hostile, posing
97154d05 PM	146	# a technical threat to our users (i. e. listed at Spamhaus DROP et al.)
37a9a0ba	147	iptables -N HOSTILE
97154d05	148	if [ "$DROPHOSTILE" == "on" ]; then
37a9a0ba PM	149	iptables -A HOSTILE -m limit --limit 10/second -j LOG --log-prefix "DROP_HOSTILE "
	150	iptables -A INPUT -i $IFACE -m geoip --src-cc XD -j HOSTILE
	151	iptables -A FORWARD -i $IFACE -m geoip --src-cc XD -j HOSTILE
	152	iptables -A FORWARD -o $IFACE -m geoip --dst-cc XD -j HOSTILE
	153	iptables -A OUTPUT -o $IFACE -m geoip --src-cc XD -j HOSTILE
97154d05	154	fi
37a9a0ba	155	iptables -A HOSTILE -j DROP -m comment --comment "DROP_HOSTILE"
97154d05	156
2a5b19c5 AF	157	# P2PBLOCK
	158	iptables -N P2PBLOCK
	159	iptables -A INPUT -j P2PBLOCK
	160	iptables -A FORWARD -j P2PBLOCK
	161	iptables -A OUTPUT -j P2PBLOCK
0e7bfb13	162
ef7e9e52	163	# IPS (Guardian) chains
c581b670 MT	164	iptables -N GUARDIAN
	165	iptables -A INPUT -j GUARDIAN
	166	iptables -A FORWARD -j GUARDIAN
815eaff4	167
80fbd899 MT	168	# Block non-established IPsec networks
	169	iptables -N IPSECBLOCK
	170	iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
	171	iptables -A OUTPUT -m policy --dir out --pol none -j IPSECBLOCK
	172
1e555330	173	# Block OpenVPN transfer networks
c581b670	174	iptables -N OVPNBLOCK
a0a5c14f	175	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	176	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	177	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	178
ef7e9e52	179	# IPS (Suricata) chains
5dba8382 PM	180	iptables -N IPS_INPUT
	181	iptables -N IPS_FORWARD
	182	iptables -N IPS_OUTPUT
3fa8300e MT	183
	184	for chain in INPUT FORWARD OUTPUT; do
	185	iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j "IPS_${chain}"
	186	done
5dba8382	187
51ab1de1	188	# OpenVPN transfer network translation
c581b670 MT	189	iptables -t nat -N OVPNNAT
c581b670 MT	190	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	191
daa1ceba	192	# IPTV chains for IGMPPROXY
c581b670 MT	193	iptables -N IPTVINPUT
	194	iptables -A INPUT -j IPTVINPUT
	195	iptables -N IPTVFORWARD
	196	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	197
8e59a602 MT	198	# Allow to ping the firewall.
	199	iptables -N ICMPINPUT
	200	iptables -A INPUT -j ICMPINPUT
	201	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	202
a36cd34e	203	# Accept everything on loopback if source/destination is loopback space...
c581b670	204	iptables -N LOOPBACK
a36cd34e PM	205	iptables -A LOOPBACK -i lo -s 127.0.0.0/8 -j ACCEPT
	206	iptables -A LOOPBACK -o lo -d 127.0.0.0/8 -j ACCEPT
	207
	208	# ... and drop everything else on the loopback interface, since no other traffic should appear there
	209	iptables -A LOOPBACK -i lo -j SPOOFED_MARTIAN
	210	iptables -A LOOPBACK -o lo -j SPOOFED_MARTIAN
afc611d4	211
a36cd34e PM	212	# Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
	213	iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
	214	iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN
3b9a23ce MT	215
3b9a23ce MT	216	for i in INPUT FORWARD OUTPUT; do
c581b670	217	iptables -A ${i} -j LOOPBACK
3b9a23ce	218	done
afc611d4	219
bbaa3613 AM	220	# Captive portal
	221	iptables -N CAPTIVE_PORTAL
	222	iptables -N CAPTIVE_PORTAL_CLIENTS
	223	for i in INPUT FORWARD; do
	224	iptables -A ${i} -j CAPTIVE_PORTAL
	225	done
	226
3a1019f6	227	# Accept everything connected
b85d2a98	228	for i in INPUT FORWARD OUTPUT; do
c581b670	229	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	230	done
b85d2a98 MT	231
8490e496 MT	232	# Allow DHCP
	233	iptables -N DHCPINPUT
	234	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	235	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	236
	237	iptables -N DHCPOUTPUT
	238	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	239	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	240
	241	# Allow DHCP on GREEN
	242	iptables -N DHCPGREENINPUT
	243	iptables -N DHCPGREENOUTPUT
	244	if [ -n "${GREEN_DEV}" ]; then
	245	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	246	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	247	fi
	248
ef7e9e52	249	# Allow DHCP on BLUE to be turned on/off
8490e496 MT	250	iptables -N DHCPBLUEINPUT
	251	iptables -N DHCPBLUEOUTPUT
	252	if [ -n "${BLUE_DEV}" ]; then
	253	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	254	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	255	fi
	256
4d25c1f3 PM	257	# Tor (inbound)
	258	iptables -N TOR_INPUT
	259	iptables -A INPUT -j TOR_INPUT
	260
0e6eca78 MT	261	# Location Block
	262	iptables -N LOCATIONBLOCK
	263	iptables -A INPUT -j LOCATIONBLOCK
	264	iptables -A FORWARD -j LOCATIONBLOCK
cab02e2a	265
5fd30232	266	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	267	iptables -N IPSECINPUT
	268	iptables -N IPSECFORWARD
	269	iptables -N IPSECOUTPUT
	270	iptables -A INPUT -j IPSECINPUT
	271	iptables -A FORWARD -j IPSECFORWARD
	272	iptables -A OUTPUT -j IPSECOUTPUT
	273	iptables -t nat -N IPSECNAT
	274	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	275
3a1019f6	276	# localhost and ethernet.
c0e0848f MT	277	# Always allow accessing the web GUI from GREEN.
	278	iptables -N GUIINPUT
	279	iptables -A INPUT -j GUIINPUT
48a7737f MT	280	if [ -n "${GREEN_DEV}" ]; then
	281	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	282	fi
8490e496	283
81393987	284	# WIRELESS chains
c581b670 MT	285	iptables -N WIRELESSINPUT
	286	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	287	iptables -N WIRELESSFORWARD
	288	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	289
ab4876ad	290	# OpenVPN
c581b670 MT	291	iptables -N OVPNINPUT
c581b670 MT	292	iptables -A INPUT -j OVPNINPUT
ab4876ad	293
4d25c1f3	294	# Tor (outbound)
5fc5f703 PM	295	iptables -N TOR_OUTPUT
5fc5f703 PM	296	iptables -A OUTPUT -j TOR_OUTPUT
0e7bfb13	297
d5f1422d	298	# Jump into the actual firewall ruleset.
c581b670 MT	299	iptables -N INPUTFW
c581b670 MT	300	iptables -A INPUT -j INPUTFW
d5f1422d	301
c581b670 MT	302	iptables -N OUTGOINGFW
c581b670 MT	303	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	304
c581b670 MT	305	iptables -N FORWARDFW
c581b670 MT	306	iptables -A FORWARD -j FORWARDFW
d5f1422d	307
fac38614	308	# SNAT rules
c581b670 MT	309	iptables -t nat -N NAT_SOURCE
c581b670 MT	310	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	311
9bb40553 MT	312	# Captive Portal
	313	iptables -t nat -N CAPTIVE_PORTAL
	314	iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
	315
bb12dd7b	316	# Custom prerouting chains (for transparent proxy)
c581b670 MT	317	iptables -t nat -N SQUID
c581b670 MT	318	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	319
bb12dd7b MT	320	# DNAT rules
c581b670 MT	321	iptables -t nat -N NAT_DESTINATION
c581b670 MT	322	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	323	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	324
6e87f0aa MT	325	iptables -t mangle -N NAT_DESTINATION
	326	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	327
	328	iptables -t nat -N NAT_DESTINATION_FIX
	329	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	330
48a7737f MT	331	if [ -n "${GREEN_ADDRESS}" ]; then
48a7737f MT	332	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	333	-m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
48a7737f	334	fi
6e87f0aa MT	335
	336	if [ -n "${BLUE_ADDRESS}" ]; then
	337	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	338	-m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
6e87f0aa MT	339	fi
	340
	341	if [ -n "${ORANGE_ADDRESS}" ]; then
	342	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	343	-m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
6e87f0aa MT	344	fi
6e87f0aa MT	345
6e87f0aa MT	346	# RED chain, used for the red interface
	347	iptables -N REDINPUT
	348	iptables -A INPUT -j REDINPUT
	349	iptables -N REDFORWARD
	350	iptables -A FORWARD -j REDFORWARD
	351	iptables -t nat -N REDNAT
	352	iptables -t nat -A POSTROUTING -j REDNAT
	353
6c920b19 MT	354	# Populate IPsec chains
6c920b19 MT	355	/usr/lib/firewall/ipsec-policy
80fbd899	356
ab4876ad MT	357	# Apply OpenVPN firewall rules
ab4876ad MT	358	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	359
	360	# run wirelessctrl
	361	/usr/local/bin/wirelessctrl
	362
1722701a AM	363	# run captivectrl
	364	/usr/local/bin/captivectrl
	365
c581b670 MT	366	# POLICY CHAIN
	367	iptables -N POLICYIN
	368	iptables -A INPUT -j POLICYIN
	369	iptables -N POLICYFWD
	370	iptables -A FORWARD -j POLICYFWD
	371	iptables -N POLICYOUT
	372	iptables -A OUTPUT -j POLICYOUT
b324de14	373
bb383423	374	# Initialize firewall policies.
5d7faa45	375	/usr/sbin/firewall-policy
690b0bd7	376
bb383423	377	# Install firewall rules for the red interface.
4b12aa41 TE	378	iptables_red_up
	379
	380	# If red has not been brought up yet, we will
	381	# add the blocking rules for MASQUERADE
	382	if [ ! -e "/var/ipfire/red/active" ]; then
	383	iptables_red_down
	384	fi
ff4770c7	385	}
3a1019f6	386
4b12aa41	387	iptables_red_up() {
c581b670 MT	388	iptables -F REDINPUT
	389	iptables -F REDFORWARD
	390	iptables -t nat -F REDNAT
3a1019f6	391
e83ae0d4 PM	392	# Prohibit spoofing our own IP address on RED
	393	if [ -f /var/ipfire/red/active ]; then
	394	REDIP="$( cat /var/ipfire/red/local-ipaddress )";
	395
	396	if [ "$IFACE" != "" ]; then
	397	iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
	398	elif [ "$DEVICE" != "" ]; then
	399	iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
	400	fi
	401	fi
	402
ff4770c7 AM	403	# PPPoE / PPTP Device
	404	if [ "$IFACE" != "" ]; then
	405	# PPPoE / PPTP
	406	if [ "$DEVICE" != "" ]; then
c581b670	407	iptables -A REDINPUT -i $DEVICE -j ACCEPT
ff4770c7 AM	408	fi
	409	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	410	if [ "$RED_DEV" != "" ]; then
c581b670	411	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
ff4770c7 AM	412	fi
ff4770c7 AM	413	fi
3a1019f6	414	fi
ff4770c7 AM	415
	416	# PPTP over DHCP
	417	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	418	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	419	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	420	fi
3a1019f6 MT	421
ff4770c7 AM	422	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	423	# DHCP
	424	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	425	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	426	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	427	fi
ff4770c7 AM	428	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	429	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	430	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	431	fi
ff4770c7 AM	432
51c4b73f	433	# Outgoing masquerading (don't masqerade IPsec)
e850a614	434	iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN
c926c637	435
60fcb241 AF	436	if [ "${IFACE}" = "${GREEN_DEV}" ]; then
60fcb241 AF	437	iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
c926c637	438	fi
c400fe4c	439
983d471f	440	local NO_MASQ_NETWORKS
83ef9c40 MT	441
83ef9c40 MT	442	if [ "${MASQUERADE_GREEN}" = "off" ]; then
983d471f	443	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
83ef9c40 MT	444	fi
	445
	446	if [ "${MASQUERADE_BLUE}" = "off" ]; then
983d471f	447	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
83ef9c40 MT	448	fi
	449
	450	if [ "${MASQUERADE_ORANGE}" = "off" ]; then
983d471f	451	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
83ef9c40 MT	452	fi
83ef9c40 MT	453
983d471f MT	454	local network
	455	for network in ${NO_MASQ_NETWORKS}; do
	456	iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
83ef9c40 MT	457	done
	458
	459	# Masquerade everything else
	460	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
6be0579b	461	fi
66f6b279 MT	462
66f6b279 MT	463	# Reload all rules.
55a5bcae	464	/usr/local/bin/firewallctrl
ff4770c7 AM	465	}
ff4770c7 AM	466
4b12aa41 TE	467	iptables_red_down() {
4b12aa41 TE	468	# Prohibit packets to reach the masquerading rule
e01e07ec	469	# while the WAN interface is down - this is required to
4b12aa41 TE	470	# circumvent udp related NAT issues
4b12aa41 TE	471	# http://forum.ipfire.org/index.php?topic=11127.0
e7204c2d MT	472	if [ -n "${IFACE}" ]; then
	473	iptables -F REDFORWARD
	474	iptables -A REDFORWARD -o "${IFACE}" -j DROP
	475	fi
4b12aa41 TE	476
	477	# Reload all rules.
	478	/usr/local/bin/firewallctrl
	479	}
	480
ff4770c7 AM	481	# See how we were called.
	482	case "$1" in
	483	start)
7d7740a4	484	boot_mesg "Setting up firewall"
ff4770c7	485	iptables_init
7d7740a4	486	evaluate_retval
6be0579b	487	;;
4b12aa41	488	reload\|up)
7d7740a4	489	boot_mesg "Reloading firewall"
4b12aa41	490	iptables_red_up
7d7740a4	491	evaluate_retval
3a1019f6	492	;;
4b12aa41 TE	493	down)
	494	boot_mesg "Disabling firewall access to RED"
	495	iptables_red_down
	496	evaluate_retval
	497	;;
3a1019f6	498	restart)
3a1019f6 MT	499	$0 start
	500	;;
	501	*)
ff4770c7	502	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	503	exit 1
	504	;;
	505	esac
	506
	507	exit 0