[people/pmueller/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)
if [ -r "/var/ipfire/tor/settings"  ]; then
	eval $(/usr/local/bin/readhash /var/ipfire/tor/settings)
fi
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"

	# IP Address Blocklist chains
	iptables -N BLOCKLISTIN
	iptables -N BLOCKLISTOUT
	iptables -A INPUT ! -p icmp -j BLOCKLISTIN
	iptables -A FORWARD ! -p icmp -j BLOCKLISTIN
	iptables -A FORWARD ! -p icmp -j BLOCKLISTOUT
	iptables -A OUTPUT ! -p icmp -j BLOCKLISTOUT

	# 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

	# If a Tor relay is enabled apply firewall rules
	if [ "${TOR_RELAY_ENABLED}" = "on" -a -n "${TOR_RELAY_PORT}" ]; then
		/usr/local/bin/torctrl restart 1> /dev/null
	fi

	# 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

	# 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)
e5a77641 EK	28	if [ -r "/var/ipfire/tor/settings" ]; then
	29	eval $(/usr/local/bin/readhash /var/ipfire/tor/settings)
	30	fi
3a1019f6	31	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
5462658e	32	if [ -z $IFACE ]; then
5b0eca95 AF	33	IFACE="red0"
5b0eca95 AF	34	fi
3a1019f6 MT	35
	36	if [ -f /var/ipfire/red/device ]; then
	37	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	38	fi
	39
ce31144c MT	40	NAT_MASK="0x0f000000"
ce31144c MT	41
3fa8300e MT	42	IPS_REPEAT_MARK="0x80000000"
	43	IPS_REPEAT_MASK="0x80000000"
	44	IPS_BYPASS_MARK="0x40000000"
	45	IPS_BYPASS_MASK="0x40000000"
	46
83085ae9 SS	47	IPSET_DB_DIR="/var/lib/location/ipset"
83085ae9 SS	48
c581b670 MT	49	function iptables() {
	50	/sbin/iptables --wait "$@"
	51	}
	52
3a1019f6 MT	53	iptables_init() {
3a1019f6 MT	54	# Flush all rules and delete all custom chains
c581b670 MT	55	iptables -F
	56	iptables -t nat -F
	57	iptables -t mangle -F
b1109b8a	58	iptables -t raw -F
c581b670 MT	59	iptables -X
	60	iptables -t nat -X
	61	iptables -t mangle -X
b1109b8a	62	iptables -t raw -X
3a1019f6 MT	63
3a1019f6 MT	64	# Set up policies
c581b670 MT	65	iptables -P INPUT DROP
	66	iptables -P FORWARD DROP
	67	iptables -P OUTPUT ACCEPT
3a1019f6	68
78b65ea7 MT	69	# Enable TRACE logging to syslog
	70	modprobe nf_log_ipv4
	71	sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4
	72
3fa8300e MT	73	# IPS Bypass Chain which stores the BYPASS bit in connection tracking
3fa8300e MT	74	iptables -N IPSBYPASS
19357bc5	75	iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))"
3fa8300e MT	76
	77	# Jump into bypass chain when the BYPASS bit is set
	78	for chain in INPUT FORWARD OUTPUT; do
	79	iptables -A "${chain}" -m mark \
	80	--mark "$(( IPS_REPEAT_MARK \| IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j IPSBYPASS
	81	done
	82
3a1019f6	83	# Empty LOG_DROP and LOG_REJECT chains
c581b670	84	iptables -N LOG_DROP
8ee3a135	85	iptables -A LOG_DROP -m limit --limit 10/second -j LOG
c581b670 MT	86	iptables -A LOG_DROP -j DROP
c581b670 MT	87	iptables -N LOG_REJECT
8ee3a135	88	iptables -A LOG_REJECT -m limit --limit 10/second -j LOG
c581b670	89	iptables -A LOG_REJECT -j REJECT
3a1019f6 MT	90
3a1019f6 MT	91	# This chain will log, then DROPs packets with certain bad combinations
ef7e9e52	92	# of flags might indicate a port-scan attempt (xmas, null, etc.)
c581b670	93	iptables -N PSCAN
5595bc03	94	if [ "$DROPPORTSCAN" == "on" ]; then
ef7e9e52 PM	95	iptables -A PSCAN -p tcp -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
ef7e9e52 PM	96	iptables -A PSCAN -p udp -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
8ee3a135 PM	97	iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
8ee3a135 PM	98	iptables -A PSCAN -f -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	99	fi
c581b670	100	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	101
3a1019f6 MT	102	# New tcp packets without SYN set - could well be an obscure type of port scan
ef7e9e52	103	# that's not covered above, may just be a broken Windows machine
c581b670	104	iptables -N NEWNOTSYN
5595bc03	105	if [ "$DROPNEWNOTSYN" == "on" ]; then
8ee3a135	106	iptables -A NEWNOTSYN -m limit --limit 10/second -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	107	fi
c581b670	108	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6	109
a36cd34e PM	110	# Log and subsequently drop spoofed packets or "martians", arriving from sources
	111	# on interfaces where we don't expect them
	112	iptables -N SPOOFED_MARTIAN
	113	if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then
	114	iptables -A SPOOFED_MARTIAN -m limit --limit 10/second -j LOG --log-prefix "DROP_SPOOFED_MARTIAN "
	115	fi
	116	iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN"
	117
3a1019f6	118	# Chain to contain all the rules relating to bad TCP flags
c581b670	119	iptables -N BADTCP
3a1019f6	120
c581b670 MT	121	# Don't check loopback
c581b670 MT	122	iptables -A BADTCP -i lo -j RETURN
d8158ca6	123
3a1019f6	124	# Disallow packets frequently used by port-scanners
dccbf1bf AF	125	# NMAP FIN/URG/PSH (XMAS scan)
	126	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	127	# SYN/RST/ACK/FIN/URG
	128	iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
	129	# ALL/ALL
	130	iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
	131	# FIN Stealth
c581b670	132	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
3a1019f6	133	# SYN/RST (also catches xmas variants that set SYN+RST+...)
c581b670	134	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
3a1019f6	135	# SYN/FIN (QueSO or nmap OS probe)
c581b670	136	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
dccbf1bf AF	137	# Null
dccbf1bf AF	138	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
3a1019f6	139	# NEW TCP without SYN
c581b670	140	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
b85d2a98	141
c581b670 MT	142	iptables -A INPUT -p tcp -j BADTCP
c581b670 MT	143	iptables -A FORWARD -p tcp -j BADTCP
c0359d6d	144
b1109b8a	145	# Connection tracking chains
5ca74566	146	iptables -N CTINVALID
8269c831 PM	147	if [ "$LOGDROPCTINVALID" == "on" ]; then
	148	iptables -A CTINVALID -m limit --limit 10/second -j LOG --log-prefix "DROP_CTINVALID "
	149	fi
5ca74566 PM	150	iptables -A CTINVALID -j DROP -m comment --comment "DROP_CTINVALID"
5ca74566 PM	151
c581b670	152	iptables -N CONNTRACK
b1109b8a	153	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
5ca74566	154	iptables -A CONNTRACK -m conntrack --ctstate INVALID -j CTINVALID
0f535060	155	iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
b1109b8a	156
c825fcef MT	157	# Restore any connection marks
	158	iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
	159
ef7e9e52	160	# Fix for braindead ISPs
c581b670	161	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	162
3a1019f6 MT	163	# CUSTOM chains, can be used by the users themselves
c581b670 MT	164	iptables -N CUSTOMINPUT
	165	iptables -A INPUT -j CUSTOMINPUT
	166	iptables -N CUSTOMFORWARD
	167	iptables -A FORWARD -j CUSTOMFORWARD
	168	iptables -N CUSTOMOUTPUT
	169	iptables -A OUTPUT -j CUSTOMOUTPUT
	170	iptables -t nat -N CUSTOMPREROUTING
	171	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	172	iptables -t nat -N CUSTOMPOSTROUTING
	173	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
3a1019f6	174
247e9780 PM	175	# Chains for networks known as being hostile, posing a technical threat to our users
	176	# (i. e. listed at Spamhaus DROP et al.)
	177	iptables -N HOSTILE
	178	iptables -A INPUT -j HOSTILE
	179	iptables -A FORWARD -j HOSTILE
	180	iptables -A OUTPUT -j HOSTILE
	181
	182	iptables -N HOSTILE_DROP
	183	iptables -A HOSTILE_DROP -m limit --limit 10/second -j LOG --log-prefix "DROP_HOSTILE "
	184	iptables -A HOSTILE_DROP -j DROP -m comment --comment "DROP_HOSTILE"
	185
733267f3 TF	186	# IP Address Blocklist chains
	187	iptables -N BLOCKLISTIN
	188	iptables -N BLOCKLISTOUT
	189	iptables -A INPUT ! -p icmp -j BLOCKLISTIN
	190	iptables -A FORWARD ! -p icmp -j BLOCKLISTIN
	191	iptables -A FORWARD ! -p icmp -j BLOCKLISTOUT
	192	iptables -A OUTPUT ! -p icmp -j BLOCKLISTOUT
	193
ef7e9e52	194	# IPS (Guardian) chains
c581b670 MT	195	iptables -N GUARDIAN
	196	iptables -A INPUT -j GUARDIAN
	197	iptables -A FORWARD -j GUARDIAN
815eaff4	198
80fbd899 MT	199	# Block non-established IPsec networks
	200	iptables -N IPSECBLOCK
	201	iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
	202	iptables -A OUTPUT -m policy --dir out --pol none -j IPSECBLOCK
	203
1e555330	204	# Block OpenVPN transfer networks
c581b670	205	iptables -N OVPNBLOCK
a0a5c14f	206	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	207	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	208	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	209
ef7e9e52	210	# IPS (Suricata) chains
5dba8382 PM	211	iptables -N IPS_INPUT
	212	iptables -N IPS_FORWARD
	213	iptables -N IPS_OUTPUT
3fa8300e MT	214
	215	for chain in INPUT FORWARD OUTPUT; do
	216	iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK \| IPS_BYPASS_MASK ))" -j "IPS_${chain}"
	217	done
5dba8382	218
51ab1de1	219	# OpenVPN transfer network translation
c581b670 MT	220	iptables -t nat -N OVPNNAT
c581b670 MT	221	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	222
daa1ceba	223	# IPTV chains for IGMPPROXY
c581b670 MT	224	iptables -N IPTVINPUT
	225	iptables -A INPUT -j IPTVINPUT
	226	iptables -N IPTVFORWARD
	227	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	228
8e59a602 MT	229	# Allow to ping the firewall.
	230	iptables -N ICMPINPUT
	231	iptables -A INPUT -j ICMPINPUT
	232	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	233
2b44044b	234	# Accept everything on loopback
c581b670	235	iptables -N LOOPBACK
2b44044b AF	236	iptables -A LOOPBACK -i lo -j ACCEPT
2b44044b AF	237	iptables -A LOOPBACK -o lo -j ACCEPT
afc611d4	238
a36cd34e PM	239	# Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
	240	iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
	241	iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN
3b9a23ce MT	242
3b9a23ce MT	243	for i in INPUT FORWARD OUTPUT; do
c581b670	244	iptables -A ${i} -j LOOPBACK
3b9a23ce	245	done
afc611d4	246
bbaa3613 AM	247	# Captive portal
	248	iptables -N CAPTIVE_PORTAL
	249	iptables -N CAPTIVE_PORTAL_CLIENTS
	250	for i in INPUT FORWARD; do
	251	iptables -A ${i} -j CAPTIVE_PORTAL
	252	done
	253
3a1019f6	254	# Accept everything connected
b85d2a98	255	for i in INPUT FORWARD OUTPUT; do
c581b670	256	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	257	done
b85d2a98 MT	258
8490e496 MT	259	# Allow DHCP
	260	iptables -N DHCPINPUT
	261	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	262	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	263
	264	iptables -N DHCPOUTPUT
	265	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	266	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	267
	268	# Allow DHCP on GREEN
	269	iptables -N DHCPGREENINPUT
	270	iptables -N DHCPGREENOUTPUT
	271	if [ -n "${GREEN_DEV}" ]; then
	272	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	273	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	274	fi
	275
ef7e9e52	276	# Allow DHCP on BLUE to be turned on/off
8490e496 MT	277	iptables -N DHCPBLUEINPUT
	278	iptables -N DHCPBLUEOUTPUT
	279	if [ -n "${BLUE_DEV}" ]; then
	280	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	281	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	282	fi
	283
4d25c1f3 PM	284	# Tor (inbound)
	285	iptables -N TOR_INPUT
	286	iptables -A INPUT -j TOR_INPUT
	287
0e6eca78 MT	288	# Location Block
	289	iptables -N LOCATIONBLOCK
	290	iptables -A INPUT -j LOCATIONBLOCK
	291	iptables -A FORWARD -j LOCATIONBLOCK
cab02e2a	292
5fd30232	293	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	294	iptables -N IPSECINPUT
	295	iptables -N IPSECFORWARD
	296	iptables -N IPSECOUTPUT
	297	iptables -A INPUT -j IPSECINPUT
	298	iptables -A FORWARD -j IPSECFORWARD
	299	iptables -A OUTPUT -j IPSECOUTPUT
	300	iptables -t nat -N IPSECNAT
	301	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	302
3a1019f6	303	# localhost and ethernet.
c0e0848f MT	304	# Always allow accessing the web GUI from GREEN.
	305	iptables -N GUIINPUT
	306	iptables -A INPUT -j GUIINPUT
48a7737f MT	307	if [ -n "${GREEN_DEV}" ]; then
	308	iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
	309	fi
8490e496	310
81393987	311	# WIRELESS chains
c581b670 MT	312	iptables -N WIRELESSINPUT
	313	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	314	iptables -N WIRELESSFORWARD
	315	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	316
ab4876ad	317	# OpenVPN
c581b670 MT	318	iptables -N OVPNINPUT
c581b670 MT	319	iptables -A INPUT -j OVPNINPUT
ab4876ad	320
4d25c1f3	321	# Tor (outbound)
5fc5f703 PM	322	iptables -N TOR_OUTPUT
5fc5f703 PM	323	iptables -A OUTPUT -j TOR_OUTPUT
0e7bfb13	324
d5f1422d	325	# Jump into the actual firewall ruleset.
c581b670 MT	326	iptables -N INPUTFW
c581b670 MT	327	iptables -A INPUT -j INPUTFW
d5f1422d	328
c581b670 MT	329	iptables -N OUTGOINGFW
c581b670 MT	330	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	331
c581b670 MT	332	iptables -N FORWARDFW
c581b670 MT	333	iptables -A FORWARD -j FORWARDFW
d5f1422d	334
fac38614	335	# SNAT rules
c581b670 MT	336	iptables -t nat -N NAT_SOURCE
c581b670 MT	337	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	338
9bb40553 MT	339	# Captive Portal
	340	iptables -t nat -N CAPTIVE_PORTAL
	341	iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
	342
bb12dd7b	343	# Custom prerouting chains (for transparent proxy)
c581b670 MT	344	iptables -t nat -N SQUID
c581b670 MT	345	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	346
bb12dd7b MT	347	# DNAT rules
c581b670 MT	348	iptables -t nat -N NAT_DESTINATION
c581b670 MT	349	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	350	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	351
6e87f0aa MT	352	iptables -t mangle -N NAT_DESTINATION
	353	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	354
	355	iptables -t nat -N NAT_DESTINATION_FIX
	356	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	357
48a7737f MT	358	if [ -n "${GREEN_ADDRESS}" ]; then
48a7737f MT	359	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	360	-m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
48a7737f	361	fi
6e87f0aa MT	362
	363	if [ -n "${BLUE_ADDRESS}" ]; then
	364	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	365	-m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
6e87f0aa MT	366	fi
	367
	368	if [ -n "${ORANGE_ADDRESS}" ]; then
	369	iptables -t nat -A NAT_DESTINATION_FIX \
ce31144c	370	-m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
6e87f0aa MT	371	fi
6e87f0aa MT	372
6e87f0aa MT	373	# RED chain, used for the red interface
	374	iptables -N REDINPUT
	375	iptables -A INPUT -j REDINPUT
	376	iptables -N REDFORWARD
	377	iptables -A FORWARD -j REDFORWARD
	378	iptables -t nat -N REDNAT
	379	iptables -t nat -A POSTROUTING -j REDNAT
	380
6c920b19 MT	381	# Populate IPsec chains
6c920b19 MT	382	/usr/lib/firewall/ipsec-policy
80fbd899	383
ab4876ad MT	384	# Apply OpenVPN firewall rules
ab4876ad MT	385	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	386
	387	# run wirelessctrl
	388	/usr/local/bin/wirelessctrl
	389
1722701a AM	390	# run captivectrl
	391	/usr/local/bin/captivectrl
	392
e5a77641 EK	393	# If a Tor relay is enabled apply firewall rules
	394	if [ "${TOR_RELAY_ENABLED}" = "on" -a -n "${TOR_RELAY_PORT}" ]; then
	395	/usr/local/bin/torctrl restart 1> /dev/null
	396	fi
	397
c581b670 MT	398	# POLICY CHAIN
	399	iptables -N POLICYIN
	400	iptables -A INPUT -j POLICYIN
	401	iptables -N POLICYFWD
	402	iptables -A FORWARD -j POLICYFWD
	403	iptables -N POLICYOUT
	404	iptables -A OUTPUT -j POLICYOUT
b324de14	405
bb383423	406	# Initialize firewall policies.
5d7faa45	407	/usr/sbin/firewall-policy
690b0bd7	408
bb383423	409	# Install firewall rules for the red interface.
4b12aa41 TE	410	iptables_red_up
	411
	412	# If red has not been brought up yet, we will
	413	# add the blocking rules for MASQUERADE
	414	if [ ! -e "/var/ipfire/red/active" ]; then
	415	iptables_red_down
	416	fi
ff4770c7	417	}
3a1019f6	418
4b12aa41	419	iptables_red_up() {
c581b670 MT	420	iptables -F REDINPUT
	421	iptables -F REDFORWARD
	422	iptables -t nat -F REDNAT
3a1019f6	423
e83ae0d4 PM	424	# Prohibit spoofing our own IP address on RED
	425	if [ -f /var/ipfire/red/active ]; then
	426	REDIP="$( cat /var/ipfire/red/local-ipaddress )";
	427
	428	if [ "$IFACE" != "" ]; then
	429	iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
	430	elif [ "$DEVICE" != "" ]; then
	431	iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
	432	fi
	433	fi
	434
ff4770c7 AM	435	# PPTP over DHCP
ff4770c7 AM	436	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	437	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	438	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	439	fi
3a1019f6 MT	440
ff4770c7 AM	441	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	442	# DHCP
	443	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	444	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	445	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	446	fi
ff4770c7 AM	447	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	448	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	449	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	450	fi
ff4770c7 AM	451
51c4b73f	452	# Outgoing masquerading (don't masqerade IPsec)
e850a614	453	iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN
c926c637	454
60fcb241 AF	455	if [ "${IFACE}" = "${GREEN_DEV}" ]; then
60fcb241 AF	456	iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
c926c637	457	fi
c400fe4c	458
983d471f	459	local NO_MASQ_NETWORKS
83ef9c40 MT	460
83ef9c40 MT	461	if [ "${MASQUERADE_GREEN}" = "off" ]; then
983d471f	462	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
83ef9c40 MT	463	fi
	464
	465	if [ "${MASQUERADE_BLUE}" = "off" ]; then
983d471f	466	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
83ef9c40 MT	467	fi
	468
	469	if [ "${MASQUERADE_ORANGE}" = "off" ]; then
983d471f	470	NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
83ef9c40 MT	471	fi
83ef9c40 MT	472
983d471f MT	473	local network
	474	for network in ${NO_MASQ_NETWORKS}; do
	475	iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
83ef9c40 MT	476	done
	477
	478	# Masquerade everything else
	479	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
6be0579b	480	fi
66f6b279 MT	481
66f6b279 MT	482	# Reload all rules.
55a5bcae	483	/usr/local/bin/firewallctrl
ff4770c7 AM	484	}
ff4770c7 AM	485
4b12aa41 TE	486	iptables_red_down() {
4b12aa41 TE	487	# Prohibit packets to reach the masquerading rule
e01e07ec	488	# while the WAN interface is down - this is required to
4b12aa41 TE	489	# circumvent udp related NAT issues
4b12aa41 TE	490	# http://forum.ipfire.org/index.php?topic=11127.0
e7204c2d MT	491	if [ -n "${IFACE}" ]; then
	492	iptables -F REDFORWARD
	493	iptables -A REDFORWARD -o "${IFACE}" -j DROP
	494	fi
4b12aa41 TE	495
	496	# Reload all rules.
	497	/usr/local/bin/firewallctrl
	498	}
	499
ff4770c7 AM	500	# See how we were called.
	501	case "$1" in
	502	start)
7d7740a4	503	boot_mesg "Setting up firewall"
ff4770c7	504	iptables_init
7d7740a4	505	evaluate_retval
6be0579b	506	;;
4b12aa41	507	reload\|up)
7d7740a4	508	boot_mesg "Reloading firewall"
4b12aa41	509	iptables_red_up
7d7740a4	510	evaluate_retval
3a1019f6	511	;;
4b12aa41 TE	512	down)
	513	boot_mesg "Disabling firewall access to RED"
	514	iptables_red_down
	515	evaluate_retval
	516	;;
3a1019f6	517	restart)
3a1019f6 MT	518	$0 start
	519	;;
	520	*)
ff4770c7	521	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	522	exit 1
	523	;;
	524	esac
	525
	526	exit 0