[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 [ -z $IFACE ]; then
	IFACE="red0"
fi

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"

IPSET_DB_DIR="/var/lib/location/ipset"

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

	# 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 CTINVALID
	iptables -A CTINVALID  -m limit --limit 10/second -j LOG  --log-prefix "DROP_CTINVALID "
	iptables -A CTINVALID  -j DROP -m comment --comment "DROP_CTINVALID"

	iptables -N CONNTRACK
	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j CTINVALID
	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
		# Call ipset and load the list which contains the hostile networks.
		ipset restore < $IPSET_DB_DIR/CC_XD.ipset4

		iptables -A HOSTILE -m limit --limit 10/second -j LOG  --log-prefix "DROP_HOSTILE "
		iptables -A INPUT   -i $IFACE -m set --match-set CC_XD src -j HOSTILE
		iptables -A FORWARD -i $IFACE -m set --match-set CC_XD src -j HOSTILE
		iptables -A FORWARD -o $IFACE -m set --match-set CC_XD dst -j HOSTILE
		iptables -A OUTPUT  -o $IFACE -m set --match-set CC_XD src -j HOSTILE
	fi
	iptables -A HOSTILE -j DROP -m comment --comment "DROP_HOSTILE"

	# 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
	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 (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	9	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
5462658e	10	if [ -z $IFACE ]; then
5b0eca95 AF	11	IFACE="red0"
5b0eca95 AF	12	fi
3a1019f6 MT	13
	14	if [ -f /var/ipfire/red/device ]; then
	15	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	16	fi
	17
ce31144c MT	18	NAT_MASK="0x0f000000"
ce31144c MT	19
3fa8300e MT	20	IPS_REPEAT_MARK="0x80000000"
	21	IPS_REPEAT_MASK="0x80000000"
	22	IPS_BYPASS_MARK="0x40000000"
	23	IPS_BYPASS_MASK="0x40000000"
	24
83085ae9 SS	25	IPSET_DB_DIR="/var/lib/location/ipset"
83085ae9 SS	26
c581b670 MT	27	function iptables() {
	28	/sbin/iptables --wait "$@"
	29	}
	30
3a1019f6 MT	31	iptables_init() {
3a1019f6 MT	32	# Flush all rules and delete all custom chains
c581b670 MT	33	iptables -F
	34	iptables -t nat -F
	35	iptables -t mangle -F
b1109b8a	36	iptables -t raw -F
c581b670 MT	37	iptables -X
	38	iptables -t nat -X
	39	iptables -t mangle -X
b1109b8a	40	iptables -t raw -X
3a1019f6 MT	41
3a1019f6 MT	42	# Set up policies
c581b670 MT	43	iptables -P INPUT DROP
	44	iptables -P FORWARD DROP
	45	iptables -P OUTPUT ACCEPT
3a1019f6	46
78b65ea7 MT	47	# Enable TRACE logging to syslog
	48	modprobe nf_log_ipv4
	49	sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4
	50
3fa8300e MT	51	# IPS Bypass Chain which stores the BYPASS bit in connection tracking
3fa8300e MT	52	iptables -N IPSBYPASS
19357bc5	53	iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))"
3fa8300e MT	54
	55	# Jump into bypass chain when the BYPASS bit is set
	56	for chain in INPUT FORWARD OUTPUT; do
	57	iptables -A "${chain}" -m mark \
	58	--mark "$(( IPS_REPEAT_MARK \| IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j IPSBYPASS
	59	done
	60
3a1019f6	61	# Empty LOG_DROP and LOG_REJECT chains
c581b670	62	iptables -N LOG_DROP
8ee3a135	63	iptables -A LOG_DROP -m limit --limit 10/second -j LOG
c581b670 MT	64	iptables -A LOG_DROP -j DROP
c581b670 MT	65	iptables -N LOG_REJECT
8ee3a135	66	iptables -A LOG_REJECT -m limit --limit 10/second -j LOG
c581b670	67	iptables -A LOG_REJECT -j REJECT
3a1019f6 MT	68
3a1019f6 MT	69	# This chain will log, then DROPs packets with certain bad combinations
ef7e9e52	70	# of flags might indicate a port-scan attempt (xmas, null, etc.)
c581b670	71	iptables -N PSCAN
5595bc03	72	if [ "$DROPPORTSCAN" == "on" ]; then
ef7e9e52 PM	73	iptables -A PSCAN -p tcp -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
ef7e9e52 PM	74	iptables -A PSCAN -p udp -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
8ee3a135 PM	75	iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
8ee3a135 PM	76	iptables -A PSCAN -f -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	77	fi
c581b670	78	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	79
3a1019f6 MT	80	# New tcp packets without SYN set - could well be an obscure type of port scan
ef7e9e52	81	# that's not covered above, may just be a broken Windows machine
c581b670	82	iptables -N NEWNOTSYN
5595bc03	83	if [ "$DROPNEWNOTSYN" == "on" ]; then
8ee3a135	84	iptables -A NEWNOTSYN -m limit --limit 10/second -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	85	fi
c581b670	86	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6	87
a36cd34e PM	88	# Log and subsequently drop spoofed packets or "martians", arriving from sources
	89	# on interfaces where we don't expect them
	90	iptables -N SPOOFED_MARTIAN
	91	if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then
	92	iptables -A SPOOFED_MARTIAN -m limit --limit 10/second -j LOG --log-prefix "DROP_SPOOFED_MARTIAN "
	93	fi
	94	iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN"
	95
3a1019f6	96	# Chain to contain all the rules relating to bad TCP flags
c581b670	97	iptables -N BADTCP
3a1019f6	98
c581b670 MT	99	# Don't check loopback
c581b670 MT	100	iptables -A BADTCP -i lo -j RETURN
d8158ca6	101
3a1019f6	102	# Disallow packets frequently used by port-scanners
dccbf1bf AF	103	# NMAP FIN/URG/PSH (XMAS scan)
	104	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	105	# SYN/RST/ACK/FIN/URG
	106	iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
	107	# ALL/ALL
	108	iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
	109	# FIN Stealth
c581b670	110	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
3a1019f6	111	# SYN/RST (also catches xmas variants that set SYN+RST+...)
c581b670	112	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
3a1019f6	113	# SYN/FIN (QueSO or nmap OS probe)
c581b670	114	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
dccbf1bf AF	115	# Null
dccbf1bf AF	116	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
3a1019f6	117	# NEW TCP without SYN
c581b670	118	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
b85d2a98	119
c581b670 MT	120	iptables -A INPUT -p tcp -j BADTCP
c581b670 MT	121	iptables -A FORWARD -p tcp -j BADTCP
c0359d6d	122
b1109b8a	123	# Connection tracking chains
5ca74566 PM	124	iptables -N CTINVALID
	125	iptables -A CTINVALID -m limit --limit 10/second -j LOG --log-prefix "DROP_CTINVALID "
	126	iptables -A CTINVALID -j DROP -m comment --comment "DROP_CTINVALID"
	127
c581b670	128	iptables -N CONNTRACK
b1109b8a	129	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
5ca74566	130	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j CTINVALID
0f535060	131	iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
b1109b8a	132
c825fcef MT	133	# Restore any connection marks
	134	iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
	135
ef7e9e52	136	# Fix for braindead ISPs
c581b670	137	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	138
3a1019f6 MT	139	# CUSTOM chains, can be used by the users themselves
c581b670 MT	140	iptables -N CUSTOMINPUT
	141	iptables -A INPUT -j CUSTOMINPUT
	142	iptables -N CUSTOMFORWARD
	143	iptables -A FORWARD -j CUSTOMFORWARD
	144	iptables -N CUSTOMOUTPUT
	145	iptables -A OUTPUT -j CUSTOMOUTPUT
	146	iptables -t nat -N CUSTOMPREROUTING
	147	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	148	iptables -t nat -N CUSTOMPOSTROUTING
	149	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
3a1019f6	150
97154d05 PM	151	# Log and drop any traffic from and to networks known as being hostile, posing
97154d05 PM	152	# a technical threat to our users (i. e. listed at Spamhaus DROP et al.)
37a9a0ba	153	iptables -N HOSTILE
97154d05	154	if [ "$DROPHOSTILE" == "on" ]; then
83085ae9 SS	155	# Call ipset and load the list which contains the hostile networks.
	156	ipset restore < $IPSET_DB_DIR/CC_XD.ipset4
	157
37a9a0ba	158	iptables -A HOSTILE -m limit --limit 10/second -j LOG --log-prefix "DROP_HOSTILE "
7987879e PM	159	iptables -A INPUT -i $IFACE -m set --match-set CC_XD src -j HOSTILE
	160	iptables -A FORWARD -i $IFACE -m set --match-set CC_XD src -j HOSTILE
	161	iptables -A FORWARD -o $IFACE -m set --match-set CC_XD dst -j HOSTILE
	162	iptables -A OUTPUT -o $IFACE -m set --match-set CC_XD src -j HOSTILE
97154d05	163	fi
37a9a0ba	164	iptables -A HOSTILE -j DROP -m comment --comment "DROP_HOSTILE"
97154d05	165
ef7e9e52	166	# IPS (Guardian) chains
c581b670 MT	167	iptables -N GUARDIAN
	168	iptables -A INPUT -j GUARDIAN
	169	iptables -A FORWARD -j GUARDIAN
815eaff4	170
80fbd899 MT	171	# Block non-established IPsec networks
	172	iptables -N IPSECBLOCK
	173	iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
	174	iptables -A OUTPUT -m policy --dir out --pol none -j IPSECBLOCK
	175
1e555330	176	# Block OpenVPN transfer networks
c581b670	177	iptables -N OVPNBLOCK
a0a5c14f	178	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	179	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	180	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	181
ef7e9e52	182	# IPS (Suricata) chains
5dba8382 PM	183	iptables -N IPS_INPUT
	184	iptables -N IPS_FORWARD
	185	iptables -N IPS_OUTPUT
3fa8300e MT	186
	187	for chain in INPUT FORWARD OUTPUT; do
	188	iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j "IPS_${chain}"
	189	done
5dba8382	190
51ab1de1	191	# OpenVPN transfer network translation
c581b670 MT	192	iptables -t nat -N OVPNNAT
c581b670 MT	193	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	194
daa1ceba	195	# IPTV chains for IGMPPROXY
c581b670 MT	196	iptables -N IPTVINPUT
	197	iptables -A INPUT -j IPTVINPUT
	198	iptables -N IPTVFORWARD
	199	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	200
8e59a602 MT	201	# Allow to ping the firewall.
	202	iptables -N ICMPINPUT
	203	iptables -A INPUT -j ICMPINPUT
	204	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	205
2b44044b	206	# Accept everything on loopback
c581b670	207	iptables -N LOOPBACK
2b44044b AF	208	iptables -A LOOPBACK -i lo -j ACCEPT
2b44044b AF	209	iptables -A LOOPBACK -o lo -j ACCEPT
afc611d4	210
a36cd34e PM	211	# Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
	212	iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
	213	iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN
3b9a23ce MT	214
3b9a23ce MT	215	for i in INPUT FORWARD OUTPUT; do
c581b670	216	iptables -A ${i} -j LOOPBACK
3b9a23ce	217	done
afc611d4	218
bbaa3613 AM	219	# Captive portal
	220	iptables -N CAPTIVE_PORTAL
	221	iptables -N CAPTIVE_PORTAL_CLIENTS
	222	for i in INPUT FORWARD; do
	223	iptables -A ${i} -j CAPTIVE_PORTAL
	224	done
	225
3a1019f6	226	# Accept everything connected
b85d2a98	227	for i in INPUT FORWARD OUTPUT; do
c581b670	228	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	229	done
b85d2a98 MT	230
8490e496 MT	231	# Allow DHCP
	232	iptables -N DHCPINPUT
	233	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	234	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	235
	236	iptables -N DHCPOUTPUT
	237	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	238	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	239
	240	# Allow DHCP on GREEN
	241	iptables -N DHCPGREENINPUT
	242	iptables -N DHCPGREENOUTPUT
	243	if [ -n "${GREEN_DEV}" ]; then
	244	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	245	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	246	fi
	247
ef7e9e52	248	# Allow DHCP on BLUE to be turned on/off
8490e496 MT	249	iptables -N DHCPBLUEINPUT
	250	iptables -N DHCPBLUEOUTPUT
	251	if [ -n "${BLUE_DEV}" ]; then
	252	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	253	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	254	fi
	255
4d25c1f3 PM	256	# Tor (inbound)
	257	iptables -N TOR_INPUT
	258	iptables -A INPUT -j TOR_INPUT
	259
0e6eca78 MT	260	# Location Block
	261	iptables -N LOCATIONBLOCK
	262	iptables -A INPUT -j LOCATIONBLOCK
	263	iptables -A FORWARD -j LOCATIONBLOCK
cab02e2a	264
5fd30232	265	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	266	iptables -N IPSECINPUT
	267	iptables -N IPSECFORWARD
	268	iptables -N IPSECOUTPUT
	269	iptables -A INPUT -j IPSECINPUT
	270	iptables -A FORWARD -j IPSECFORWARD
	271	iptables -A OUTPUT -j IPSECOUTPUT
	272	iptables -t nat -N IPSECNAT
	273	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	274
3a1019f6	275	# localhost and ethernet.
c0e0848f MT	276	# Always allow accessing the web GUI from GREEN.
	277	iptables -N GUIINPUT
	278	iptables -A INPUT -j GUIINPUT
48a7737f MT	279	if [ -n "${GREEN_DEV}" ]; then
	280	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	281	fi
8490e496	282
81393987	283	# WIRELESS chains
c581b670 MT	284	iptables -N WIRELESSINPUT
	285	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	286	iptables -N WIRELESSFORWARD
	287	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	288
ab4876ad	289	# OpenVPN
c581b670 MT	290	iptables -N OVPNINPUT
c581b670 MT	291	iptables -A INPUT -j OVPNINPUT
ab4876ad	292
4d25c1f3	293	# Tor (outbound)
5fc5f703 PM	294	iptables -N TOR_OUTPUT
5fc5f703 PM	295	iptables -A OUTPUT -j TOR_OUTPUT
0e7bfb13	296
d5f1422d	297	# Jump into the actual firewall ruleset.
c581b670 MT	298	iptables -N INPUTFW
c581b670 MT	299	iptables -A INPUT -j INPUTFW
d5f1422d	300
c581b670 MT	301	iptables -N OUTGOINGFW
c581b670 MT	302	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	303
c581b670 MT	304	iptables -N FORWARDFW
c581b670 MT	305	iptables -A FORWARD -j FORWARDFW
d5f1422d	306
fac38614	307	# SNAT rules
c581b670 MT	308	iptables -t nat -N NAT_SOURCE
c581b670 MT	309	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	310
9bb40553 MT	311	# Captive Portal
	312	iptables -t nat -N CAPTIVE_PORTAL
	313	iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
	314
bb12dd7b	315	# Custom prerouting chains (for transparent proxy)
c581b670 MT	316	iptables -t nat -N SQUID
c581b670 MT	317	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	318
bb12dd7b MT	319	# DNAT rules
c581b670 MT	320	iptables -t nat -N NAT_DESTINATION
c581b670 MT	321	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	322	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	323
6e87f0aa MT	324	iptables -t mangle -N NAT_DESTINATION
	325	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	326
	327	iptables -t nat -N NAT_DESTINATION_FIX
	328	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	329
48a7737f MT	330	if [ -n "${GREEN_ADDRESS}" ]; then
48a7737f MT	331	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	332	-m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
48a7737f	333	fi
6e87f0aa MT	334
	335	if [ -n "${BLUE_ADDRESS}" ]; then
	336	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	337	-m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
6e87f0aa MT	338	fi
	339
	340	if [ -n "${ORANGE_ADDRESS}" ]; then
	341	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	342	-m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
6e87f0aa MT	343	fi
6e87f0aa MT	344
6e87f0aa MT	345	# RED chain, used for the red interface
	346	iptables -N REDINPUT
	347	iptables -A INPUT -j REDINPUT
	348	iptables -N REDFORWARD
	349	iptables -A FORWARD -j REDFORWARD
	350	iptables -t nat -N REDNAT
	351	iptables -t nat -A POSTROUTING -j REDNAT
	352
6c920b19 MT	353	# Populate IPsec chains
6c920b19 MT	354	/usr/lib/firewall/ipsec-policy
80fbd899	355
ab4876ad MT	356	# Apply OpenVPN firewall rules
ab4876ad MT	357	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	358
	359	# run wirelessctrl
	360	/usr/local/bin/wirelessctrl
	361
1722701a AM	362	# run captivectrl
	363	/usr/local/bin/captivectrl
	364
c581b670 MT	365	# POLICY CHAIN
	366	iptables -N POLICYIN
	367	iptables -A INPUT -j POLICYIN
	368	iptables -N POLICYFWD
	369	iptables -A FORWARD -j POLICYFWD
	370	iptables -N POLICYOUT
	371	iptables -A OUTPUT -j POLICYOUT
b324de14	372
bb383423	373	# Initialize firewall policies.
5d7faa45	374	/usr/sbin/firewall-policy
690b0bd7	375
bb383423	376	# Install firewall rules for the red interface.
4b12aa41 TE	377	iptables_red_up
	378
	379	# If red has not been brought up yet, we will
	380	# add the blocking rules for MASQUERADE
	381	if [ ! -e "/var/ipfire/red/active" ]; then
	382	iptables_red_down
	383	fi
ff4770c7	384	}
3a1019f6	385
4b12aa41	386	iptables_red_up() {
c581b670 MT	387	iptables -F REDINPUT
	388	iptables -F REDFORWARD
	389	iptables -t nat -F REDNAT
3a1019f6	390
e83ae0d4 PM	391	# Prohibit spoofing our own IP address on RED
	392	if [ -f /var/ipfire/red/active ]; then
	393	REDIP="$( cat /var/ipfire/red/local-ipaddress )";
	394
	395	if [ "$IFACE" != "" ]; then
	396	iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
	397	elif [ "$DEVICE" != "" ]; then
	398	iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
	399	fi
	400	fi
	401
ff4770c7 AM	402	# PPPoE / PPTP Device
	403	if [ "$IFACE" != "" ]; then
	404	# PPPoE / PPTP
	405	if [ "$DEVICE" != "" ]; then
c581b670	406	iptables -A REDINPUT -i $DEVICE -j ACCEPT
ff4770c7 AM	407	fi
	408	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	409	if [ "$RED_DEV" != "" ]; then
c581b670	410	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
ff4770c7 AM	411	fi
ff4770c7 AM	412	fi
3a1019f6	413	fi
ff4770c7 AM	414
	415	# PPTP over DHCP
	416	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	417	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	418	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	419	fi
3a1019f6 MT	420
ff4770c7 AM	421	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	422	# DHCP
	423	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	424	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	425	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	426	fi
ff4770c7 AM	427	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	428	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	429	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	430	fi
ff4770c7 AM	431
51c4b73f	432	# Outgoing masquerading (don't masqerade IPsec)
e850a614	433	iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN
c926c637	434
60fcb241 AF	435	if [ "${IFACE}" = "${GREEN_DEV}" ]; then
60fcb241 AF	436	iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
c926c637	437	fi
c400fe4c	438
983d471f	439	local NO_MASQ_NETWORKS
83ef9c40 MT	440
83ef9c40 MT	441	if [ "${MASQUERADE_GREEN}" = "off" ]; then
983d471f	442	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
83ef9c40 MT	443	fi
	444
	445	if [ "${MASQUERADE_BLUE}" = "off" ]; then
983d471f	446	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
83ef9c40 MT	447	fi
	448
	449	if [ "${MASQUERADE_ORANGE}" = "off" ]; then
983d471f	450	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
83ef9c40 MT	451	fi
83ef9c40 MT	452
983d471f MT	453	local network
	454	for network in ${NO_MASQ_NETWORKS}; do
	455	iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
83ef9c40 MT	456	done
	457
	458	# Masquerade everything else
	459	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
6be0579b	460	fi
66f6b279 MT	461
66f6b279 MT	462	# Reload all rules.
55a5bcae	463	/usr/local/bin/firewallctrl
ff4770c7 AM	464	}
ff4770c7 AM	465
4b12aa41 TE	466	iptables_red_down() {
4b12aa41 TE	467	# Prohibit packets to reach the masquerading rule
e01e07ec	468	# while the WAN interface is down - this is required to
4b12aa41 TE	469	# circumvent udp related NAT issues
4b12aa41 TE	470	# http://forum.ipfire.org/index.php?topic=11127.0
e7204c2d MT	471	if [ -n "${IFACE}" ]; then
	472	iptables -F REDFORWARD
	473	iptables -A REDFORWARD -o "${IFACE}" -j DROP
	474	fi
4b12aa41 TE	475
	476	# Reload all rules.
	477	/usr/local/bin/firewallctrl
	478	}
	479
ff4770c7 AM	480	# See how we were called.
	481	case "$1" in
	482	start)
7d7740a4	483	boot_mesg "Setting up firewall"
ff4770c7	484	iptables_init
7d7740a4	485	evaluate_retval
6be0579b	486	;;
4b12aa41	487	reload\|up)
7d7740a4	488	boot_mesg "Reloading firewall"
4b12aa41	489	iptables_red_up
7d7740a4	490	evaluate_retval
3a1019f6	491	;;
4b12aa41 TE	492	down)
	493	boot_mesg "Disabling firewall access to RED"
	494	iptables_red_down
	495	evaluate_retval
	496	;;
3a1019f6	497	restart)
3a1019f6 MT	498	$0 start
	499	;;
	500	*)
ff4770c7	501	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	502	exit 1
	503	;;
	504	esac
	505
	506	exit 0