[ipfire-2.x.git] / src / initscripts / system / firewall

#!/bin/sh
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2007-2022  IPFire Team  <info@ipfire.org>                     #
#                                                                             #
# This program is free software: you can redistribute it and/or modify        #
# it under the terms of the GNU General Public License as published by        #
# the Free Software Foundation, either version 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program is distributed in the hope that it will be useful,             #
# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
# GNU General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

. /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
	if [ "$LOGDROPCTINVALID" == "on" ]; then
		iptables -A CTINVALID  -m limit --limit 10/second -j LOG  --log-prefix "DROP_CTINVALID "
	fi
	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

	# Chains for networks known as being hostile, posing a technical threat to our users
	# (i. e. listed at Spamhaus DROP et al.)
	iptables -N HOSTILE
	iptables -A INPUT -j HOSTILE
	iptables -A FORWARD -j HOSTILE
	iptables -A OUTPUT -j HOSTILE

	iptables -N HOSTILE_DROP
	iptables -A HOSTILE_DROP -m limit --limit 10/second -j LOG --log-prefix "DROP_HOSTILE "
	iptables -A HOSTILE_DROP -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	1	#!/bin/sh
66c36198 PM	2	###############################################################################
	3	# #
	4	# IPFire.org - A linux based firewall #
	5	# Copyright (C) 2007-2022 IPFire Team <info@ipfire.org> #
	6	# #
	7	# This program is free software: you can redistribute it and/or modify #
	8	# it under the terms of the GNU General Public License as published by #
	9	# the Free Software Foundation, either version 3 of the License, or #
	10	# (at your option) any later version. #
	11	# #
	12	# This program is distributed in the hope that it will be useful, #
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of #
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
	15	# GNU General Public License for more details. #
	16	# #
	17	# You should have received a copy of the GNU General Public License #
	18	# along with this program. If not, see <http://www.gnu.org/licenses/>. #
	19	# #
	20	###############################################################################
3a1019f6	21
0f5c5ce7 MT	22	. /etc/sysconfig/rc
	23	. ${rc_functions}
	24
3a1019f6 MT	25	eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
3a1019f6 MT	26	eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
fe0cd647	27	eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
3a1019f6	28	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
5462658e	29	if [ -z $IFACE ]; then
5b0eca95 AF	30	IFACE="red0"
5b0eca95 AF	31	fi
3a1019f6 MT	32
	33	if [ -f /var/ipfire/red/device ]; then
	34	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	35	fi
	36
ce31144c MT	37	NAT_MASK="0x0f000000"
ce31144c MT	38
3fa8300e MT	39	IPS_REPEAT_MARK="0x80000000"
	40	IPS_REPEAT_MASK="0x80000000"
	41	IPS_BYPASS_MARK="0x40000000"
	42	IPS_BYPASS_MASK="0x40000000"
	43
83085ae9 SS	44	IPSET_DB_DIR="/var/lib/location/ipset"
83085ae9 SS	45
c581b670 MT	46	function iptables() {
	47	/sbin/iptables --wait "$@"
	48	}
	49
3a1019f6 MT	50	iptables_init() {
3a1019f6 MT	51	# Flush all rules and delete all custom chains
c581b670 MT	52	iptables -F
	53	iptables -t nat -F
	54	iptables -t mangle -F
b1109b8a	55	iptables -t raw -F
c581b670 MT	56	iptables -X
	57	iptables -t nat -X
	58	iptables -t mangle -X
b1109b8a	59	iptables -t raw -X
3a1019f6 MT	60
3a1019f6 MT	61	# Set up policies
c581b670 MT	62	iptables -P INPUT DROP
	63	iptables -P FORWARD DROP
	64	iptables -P OUTPUT ACCEPT
3a1019f6	65
78b65ea7 MT	66	# Enable TRACE logging to syslog
	67	modprobe nf_log_ipv4
	68	sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4
	69
3fa8300e MT	70	# IPS Bypass Chain which stores the BYPASS bit in connection tracking
3fa8300e MT	71	iptables -N IPSBYPASS
19357bc5	72	iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))"
3fa8300e MT	73
	74	# Jump into bypass chain when the BYPASS bit is set
	75	for chain in INPUT FORWARD OUTPUT; do
	76	iptables -A "${chain}" -m mark \
	77	--mark "$(( IPS_REPEAT_MARK \| IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j IPSBYPASS
	78	done
	79
3a1019f6	80	# Empty LOG_DROP and LOG_REJECT chains
c581b670	81	iptables -N LOG_DROP
8ee3a135	82	iptables -A LOG_DROP -m limit --limit 10/second -j LOG
c581b670 MT	83	iptables -A LOG_DROP -j DROP
c581b670 MT	84	iptables -N LOG_REJECT
8ee3a135	85	iptables -A LOG_REJECT -m limit --limit 10/second -j LOG
c581b670	86	iptables -A LOG_REJECT -j REJECT
3a1019f6 MT	87
3a1019f6 MT	88	# This chain will log, then DROPs packets with certain bad combinations
ef7e9e52	89	# of flags might indicate a port-scan attempt (xmas, null, etc.)
c581b670	90	iptables -N PSCAN
5595bc03	91	if [ "$DROPPORTSCAN" == "on" ]; then
ef7e9e52 PM	92	iptables -A PSCAN -p tcp -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
ef7e9e52 PM	93	iptables -A PSCAN -p udp -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
8ee3a135 PM	94	iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
8ee3a135 PM	95	iptables -A PSCAN -f -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	96	fi
c581b670	97	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	98
3a1019f6 MT	99	# New tcp packets without SYN set - could well be an obscure type of port scan
ef7e9e52	100	# that's not covered above, may just be a broken Windows machine
c581b670	101	iptables -N NEWNOTSYN
5595bc03	102	if [ "$DROPNEWNOTSYN" == "on" ]; then
8ee3a135	103	iptables -A NEWNOTSYN -m limit --limit 10/second -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	104	fi
c581b670	105	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6	106
a36cd34e PM	107	# Log and subsequently drop spoofed packets or "martians", arriving from sources
	108	# on interfaces where we don't expect them
	109	iptables -N SPOOFED_MARTIAN
	110	if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then
	111	iptables -A SPOOFED_MARTIAN -m limit --limit 10/second -j LOG --log-prefix "DROP_SPOOFED_MARTIAN "
	112	fi
	113	iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN"
	114
3a1019f6	115	# Chain to contain all the rules relating to bad TCP flags
c581b670	116	iptables -N BADTCP
3a1019f6	117
c581b670 MT	118	# Don't check loopback
c581b670 MT	119	iptables -A BADTCP -i lo -j RETURN
d8158ca6	120
3a1019f6	121	# Disallow packets frequently used by port-scanners
dccbf1bf AF	122	# NMAP FIN/URG/PSH (XMAS scan)
	123	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	124	# SYN/RST/ACK/FIN/URG
	125	iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
	126	# ALL/ALL
	127	iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
	128	# FIN Stealth
c581b670	129	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
3a1019f6	130	# SYN/RST (also catches xmas variants that set SYN+RST+...)
c581b670	131	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
3a1019f6	132	# SYN/FIN (QueSO or nmap OS probe)
c581b670	133	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
dccbf1bf AF	134	# Null
dccbf1bf AF	135	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
3a1019f6	136	# NEW TCP without SYN
c581b670	137	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
b85d2a98	138
c581b670 MT	139	iptables -A INPUT -p tcp -j BADTCP
c581b670 MT	140	iptables -A FORWARD -p tcp -j BADTCP
c0359d6d	141
b1109b8a	142	# Connection tracking chains
5ca74566	143	iptables -N CTINVALID
8269c831 PM	144	if [ "$LOGDROPCTINVALID" == "on" ]; then
	145	iptables -A CTINVALID -m limit --limit 10/second -j LOG --log-prefix "DROP_CTINVALID "
	146	fi
5ca74566 PM	147	iptables -A CTINVALID -j DROP -m comment --comment "DROP_CTINVALID"
5ca74566 PM	148
c581b670	149	iptables -N CONNTRACK
b1109b8a	150	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
5ca74566	151	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j CTINVALID
0f535060	152	iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
b1109b8a	153
c825fcef MT	154	# Restore any connection marks
	155	iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
	156
ef7e9e52	157	# Fix for braindead ISPs
c581b670	158	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	159
3a1019f6 MT	160	# CUSTOM chains, can be used by the users themselves
c581b670 MT	161	iptables -N CUSTOMINPUT
	162	iptables -A INPUT -j CUSTOMINPUT
	163	iptables -N CUSTOMFORWARD
	164	iptables -A FORWARD -j CUSTOMFORWARD
	165	iptables -N CUSTOMOUTPUT
	166	iptables -A OUTPUT -j CUSTOMOUTPUT
	167	iptables -t nat -N CUSTOMPREROUTING
	168	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	169	iptables -t nat -N CUSTOMPOSTROUTING
	170	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
3a1019f6	171
247e9780 PM	172	# Chains for networks known as being hostile, posing a technical threat to our users
	173	# (i. e. listed at Spamhaus DROP et al.)
	174	iptables -N HOSTILE
	175	iptables -A INPUT -j HOSTILE
	176	iptables -A FORWARD -j HOSTILE
	177	iptables -A OUTPUT -j HOSTILE
	178
	179	iptables -N HOSTILE_DROP
	180	iptables -A HOSTILE_DROP -m limit --limit 10/second -j LOG --log-prefix "DROP_HOSTILE "
	181	iptables -A HOSTILE_DROP -j DROP -m comment --comment "DROP_HOSTILE"
	182
ef7e9e52	183	# IPS (Guardian) chains
c581b670 MT	184	iptables -N GUARDIAN
	185	iptables -A INPUT -j GUARDIAN
	186	iptables -A FORWARD -j GUARDIAN
815eaff4	187
80fbd899 MT	188	# Block non-established IPsec networks
	189	iptables -N IPSECBLOCK
	190	iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
	191	iptables -A OUTPUT -m policy --dir out --pol none -j IPSECBLOCK
	192
1e555330	193	# Block OpenVPN transfer networks
c581b670	194	iptables -N OVPNBLOCK
a0a5c14f	195	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	196	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	197	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	198
ef7e9e52	199	# IPS (Suricata) chains
5dba8382 PM	200	iptables -N IPS_INPUT
	201	iptables -N IPS_FORWARD
	202	iptables -N IPS_OUTPUT
3fa8300e MT	203
	204	for chain in INPUT FORWARD OUTPUT; do
	205	iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j "IPS_${chain}"
	206	done
5dba8382	207
51ab1de1	208	# OpenVPN transfer network translation
c581b670 MT	209	iptables -t nat -N OVPNNAT
c581b670 MT	210	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	211
daa1ceba	212	# IPTV chains for IGMPPROXY
c581b670 MT	213	iptables -N IPTVINPUT
	214	iptables -A INPUT -j IPTVINPUT
	215	iptables -N IPTVFORWARD
	216	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	217
8e59a602 MT	218	# Allow to ping the firewall.
	219	iptables -N ICMPINPUT
	220	iptables -A INPUT -j ICMPINPUT
	221	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	222
2b44044b	223	# Accept everything on loopback
c581b670	224	iptables -N LOOPBACK
2b44044b AF	225	iptables -A LOOPBACK -i lo -j ACCEPT
2b44044b AF	226	iptables -A LOOPBACK -o lo -j ACCEPT
afc611d4	227
a36cd34e PM	228	# Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
	229	iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
	230	iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN
3b9a23ce MT	231
3b9a23ce MT	232	for i in INPUT FORWARD OUTPUT; do
c581b670	233	iptables -A ${i} -j LOOPBACK
3b9a23ce	234	done
afc611d4	235
bbaa3613 AM	236	# Captive portal
	237	iptables -N CAPTIVE_PORTAL
	238	iptables -N CAPTIVE_PORTAL_CLIENTS
	239	for i in INPUT FORWARD; do
	240	iptables -A ${i} -j CAPTIVE_PORTAL
	241	done
	242
3a1019f6	243	# Accept everything connected
b85d2a98	244	for i in INPUT FORWARD OUTPUT; do
c581b670	245	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	246	done
b85d2a98 MT	247
8490e496 MT	248	# Allow DHCP
	249	iptables -N DHCPINPUT
	250	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	251	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	252
	253	iptables -N DHCPOUTPUT
	254	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	255	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	256
	257	# Allow DHCP on GREEN
	258	iptables -N DHCPGREENINPUT
	259	iptables -N DHCPGREENOUTPUT
	260	if [ -n "${GREEN_DEV}" ]; then
	261	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	262	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	263	fi
	264
ef7e9e52	265	# Allow DHCP on BLUE to be turned on/off
8490e496 MT	266	iptables -N DHCPBLUEINPUT
	267	iptables -N DHCPBLUEOUTPUT
	268	if [ -n "${BLUE_DEV}" ]; then
	269	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	270	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	271	fi
	272
4d25c1f3 PM	273	# Tor (inbound)
	274	iptables -N TOR_INPUT
	275	iptables -A INPUT -j TOR_INPUT
	276
0e6eca78 MT	277	# Location Block
	278	iptables -N LOCATIONBLOCK
	279	iptables -A INPUT -j LOCATIONBLOCK
	280	iptables -A FORWARD -j LOCATIONBLOCK
cab02e2a	281
5fd30232	282	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	283	iptables -N IPSECINPUT
	284	iptables -N IPSECFORWARD
	285	iptables -N IPSECOUTPUT
	286	iptables -A INPUT -j IPSECINPUT
	287	iptables -A FORWARD -j IPSECFORWARD
	288	iptables -A OUTPUT -j IPSECOUTPUT
	289	iptables -t nat -N IPSECNAT
	290	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	291
3a1019f6	292	# localhost and ethernet.
c0e0848f MT	293	# Always allow accessing the web GUI from GREEN.
	294	iptables -N GUIINPUT
	295	iptables -A INPUT -j GUIINPUT
48a7737f MT	296	if [ -n "${GREEN_DEV}" ]; then
	297	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	298	fi
8490e496	299
81393987	300	# WIRELESS chains
c581b670 MT	301	iptables -N WIRELESSINPUT
	302	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	303	iptables -N WIRELESSFORWARD
	304	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	305
ab4876ad	306	# OpenVPN
c581b670 MT	307	iptables -N OVPNINPUT
c581b670 MT	308	iptables -A INPUT -j OVPNINPUT
ab4876ad	309
4d25c1f3	310	# Tor (outbound)
5fc5f703 PM	311	iptables -N TOR_OUTPUT
5fc5f703 PM	312	iptables -A OUTPUT -j TOR_OUTPUT
0e7bfb13	313
d5f1422d	314	# Jump into the actual firewall ruleset.
c581b670 MT	315	iptables -N INPUTFW
c581b670 MT	316	iptables -A INPUT -j INPUTFW
d5f1422d	317
c581b670 MT	318	iptables -N OUTGOINGFW
c581b670 MT	319	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	320
c581b670 MT	321	iptables -N FORWARDFW
c581b670 MT	322	iptables -A FORWARD -j FORWARDFW
d5f1422d	323
fac38614	324	# SNAT rules
c581b670 MT	325	iptables -t nat -N NAT_SOURCE
c581b670 MT	326	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	327
9bb40553 MT	328	# Captive Portal
	329	iptables -t nat -N CAPTIVE_PORTAL
	330	iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
	331
bb12dd7b	332	# Custom prerouting chains (for transparent proxy)
c581b670 MT	333	iptables -t nat -N SQUID
c581b670 MT	334	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	335
bb12dd7b MT	336	# DNAT rules
c581b670 MT	337	iptables -t nat -N NAT_DESTINATION
c581b670 MT	338	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	339	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	340
6e87f0aa MT	341	iptables -t mangle -N NAT_DESTINATION
	342	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	343
	344	iptables -t nat -N NAT_DESTINATION_FIX
	345	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	346
48a7737f MT	347	if [ -n "${GREEN_ADDRESS}" ]; then
48a7737f MT	348	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	349	-m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
48a7737f	350	fi
6e87f0aa MT	351
	352	if [ -n "${BLUE_ADDRESS}" ]; then
	353	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	354	-m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
6e87f0aa MT	355	fi
	356
	357	if [ -n "${ORANGE_ADDRESS}" ]; then
	358	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	359	-m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
6e87f0aa MT	360	fi
6e87f0aa MT	361
6e87f0aa MT	362	# RED chain, used for the red interface
	363	iptables -N REDINPUT
	364	iptables -A INPUT -j REDINPUT
	365	iptables -N REDFORWARD
	366	iptables -A FORWARD -j REDFORWARD
	367	iptables -t nat -N REDNAT
	368	iptables -t nat -A POSTROUTING -j REDNAT
	369
6c920b19 MT	370	# Populate IPsec chains
6c920b19 MT	371	/usr/lib/firewall/ipsec-policy
80fbd899	372
ab4876ad MT	373	# Apply OpenVPN firewall rules
ab4876ad MT	374	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	375
	376	# run wirelessctrl
	377	/usr/local/bin/wirelessctrl
	378
1722701a AM	379	# run captivectrl
	380	/usr/local/bin/captivectrl
	381
c581b670 MT	382	# POLICY CHAIN
	383	iptables -N POLICYIN
	384	iptables -A INPUT -j POLICYIN
	385	iptables -N POLICYFWD
	386	iptables -A FORWARD -j POLICYFWD
	387	iptables -N POLICYOUT
	388	iptables -A OUTPUT -j POLICYOUT
b324de14	389
bb383423	390	# Initialize firewall policies.
5d7faa45	391	/usr/sbin/firewall-policy
690b0bd7	392
bb383423	393	# Install firewall rules for the red interface.
4b12aa41 TE	394	iptables_red_up
	395
	396	# If red has not been brought up yet, we will
	397	# add the blocking rules for MASQUERADE
	398	if [ ! -e "/var/ipfire/red/active" ]; then
	399	iptables_red_down
	400	fi
ff4770c7	401	}
3a1019f6	402
4b12aa41	403	iptables_red_up() {
c581b670 MT	404	iptables -F REDINPUT
	405	iptables -F REDFORWARD
	406	iptables -t nat -F REDNAT
3a1019f6	407
e83ae0d4 PM	408	# Prohibit spoofing our own IP address on RED
	409	if [ -f /var/ipfire/red/active ]; then
	410	REDIP="$( cat /var/ipfire/red/local-ipaddress )";
	411
	412	if [ "$IFACE" != "" ]; then
	413	iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
	414	elif [ "$DEVICE" != "" ]; then
	415	iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
	416	fi
	417	fi
	418
ff4770c7 AM	419	# PPPoE / PPTP Device
	420	if [ "$IFACE" != "" ]; then
	421	# PPPoE / PPTP
	422	if [ "$DEVICE" != "" ]; then
c581b670	423	iptables -A REDINPUT -i $DEVICE -j ACCEPT
ff4770c7 AM	424	fi
	425	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	426	if [ "$RED_DEV" != "" ]; then
c581b670	427	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
ff4770c7 AM	428	fi
ff4770c7 AM	429	fi
3a1019f6	430	fi
ff4770c7 AM	431
	432	# PPTP over DHCP
	433	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	434	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	435	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	436	fi
3a1019f6 MT	437
ff4770c7 AM	438	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	439	# DHCP
	440	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	441	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	442	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	443	fi
ff4770c7 AM	444	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	445	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	446	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	447	fi
ff4770c7 AM	448
51c4b73f	449	# Outgoing masquerading (don't masqerade IPsec)
e850a614	450	iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN
c926c637	451
60fcb241 AF	452	if [ "${IFACE}" = "${GREEN_DEV}" ]; then
60fcb241 AF	453	iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
c926c637	454	fi
c400fe4c	455
983d471f	456	local NO_MASQ_NETWORKS
83ef9c40 MT	457
83ef9c40 MT	458	if [ "${MASQUERADE_GREEN}" = "off" ]; then
983d471f	459	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
83ef9c40 MT	460	fi
	461
	462	if [ "${MASQUERADE_BLUE}" = "off" ]; then
983d471f	463	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
83ef9c40 MT	464	fi
	465
	466	if [ "${MASQUERADE_ORANGE}" = "off" ]; then
983d471f	467	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
83ef9c40 MT	468	fi
83ef9c40 MT	469
983d471f MT	470	local network
	471	for network in ${NO_MASQ_NETWORKS}; do
	472	iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
83ef9c40 MT	473	done
	474
	475	# Masquerade everything else
	476	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
6be0579b	477	fi
66f6b279 MT	478
66f6b279 MT	479	# Reload all rules.
55a5bcae	480	/usr/local/bin/firewallctrl
ff4770c7 AM	481	}
ff4770c7 AM	482
4b12aa41 TE	483	iptables_red_down() {
4b12aa41 TE	484	# Prohibit packets to reach the masquerading rule
e01e07ec	485	# while the WAN interface is down - this is required to
4b12aa41 TE	486	# circumvent udp related NAT issues
4b12aa41 TE	487	# http://forum.ipfire.org/index.php?topic=11127.0
e7204c2d MT	488	if [ -n "${IFACE}" ]; then
	489	iptables -F REDFORWARD
	490	iptables -A REDFORWARD -o "${IFACE}" -j DROP
	491	fi
4b12aa41 TE	492
	493	# Reload all rules.
	494	/usr/local/bin/firewallctrl
	495	}
	496
ff4770c7 AM	497	# See how we were called.
	498	case "$1" in
	499	start)
7d7740a4	500	boot_mesg "Setting up firewall"
ff4770c7	501	iptables_init
7d7740a4	502	evaluate_retval
6be0579b	503	;;
4b12aa41	504	reload\|up)
7d7740a4	505	boot_mesg "Reloading firewall"
4b12aa41	506	iptables_red_up
7d7740a4	507	evaluate_retval
3a1019f6	508	;;
4b12aa41 TE	509	down)
	510	boot_mesg "Disabling firewall access to RED"
	511	iptables_red_down
	512	evaluate_retval
	513	;;
3a1019f6	514	restart)
3a1019f6 MT	515	$0 start
	516	;;
	517	*)
ff4770c7	518	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	519	exit 1
	520	;;
	521	esac
	522
	523	exit 0