[people/teissler/ipfire-2.x.git] / src / initscripts / init.d / firewall

#!/bin/sh

. /etc/sysconfig/rc
. ${rc_functions}

eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'`

if [ -f /var/ipfire/red/device ]; then
	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
fi

function iptables() {
	/sbin/iptables --wait "$@"
}

iptables_init() {
	# Flush all rules and delete all custom chains
	iptables -F
	iptables -t nat -F
	iptables -t mangle -F
	iptables -X
	iptables -t nat -X
	iptables -t mangle -X

	# Set up policies
	iptables -P INPUT DROP
	iptables -P FORWARD DROP
	iptables -P OUTPUT ACCEPT

	# Empty LOG_DROP and LOG_REJECT chains
	iptables -N LOG_DROP
	iptables -A LOG_DROP   -m limit --limit 10/minute -j LOG
	iptables -A LOG_DROP   -j DROP
	iptables -N LOG_REJECT
	iptables -A LOG_REJECT -m limit --limit 10/minute -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/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
		iptables -A PSCAN -p udp  -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
		iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
		iptables -A PSCAN -f      -m limit --limit 10/minute -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/minute -j LOG  --log-prefix "DROP_NEWNOTSYN "
	fi
	iptables -A NEWNOTSYN  -j DROP -m comment --comment "DROP_NEWNOTSYN"

	# Chain to contain all the rules relating to bad TCP flags
	iptables -N BADTCP

	# Don't check loopback
	iptables -A BADTCP -i lo -j RETURN

	# Disallow packets frequently used by port-scanners
	# nmap xmas
	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH  -j PSCAN
	# Null
	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
	# FIN
	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
	# 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 chain
	iptables -N CONNTRACK
	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT

	# Fix for braindead ISP's
	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

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

	# 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

	# OpenVPN transfer network translation
	iptables -t nat -N OVPNNAT
	iptables -t nat -A POSTROUTING -j OVPNNAT

	# IPTV chains for IGMPPROXY
	iptables -N IPTVINPUT
	iptables -A INPUT -j IPTVINPUT
	iptables -N IPTVFORWARD
	iptables -A FORWARD -j IPTVFORWARD

	# Allow to ping the firewall.
	iptables -N ICMPINPUT
	iptables -A INPUT -j ICMPINPUT
	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT

	# Accept everything on loopback
	iptables -N LOOPBACK
	iptables -A LOOPBACK -i lo -j ACCEPT
	iptables -A LOOPBACK -o lo -j ACCEPT

	# Filter all packets with loopback addresses on non-loopback interfaces.
	iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
	iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP

	for i in INPUT FORWARD OUTPUT; do
		iptables -A ${i} -j LOOPBACK
	done

	# 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

	# 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.
	iptables -A INPUT   -i $GREEN_DEV  -m conntrack --ctstate NEW -j ACCEPT ! -p icmp

	# 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
	iptables -N TOR_INPUT
	iptables -A INPUT -j TOR_INPUT
	
	# 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

	# 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

	iptables -t nat -A NAT_DESTINATION_FIX \
		-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"

	if [ -n "${BLUE_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark 2 -j SNAT --to-source "${BLUE_ADDRESS}"
	fi

	if [ -n "${ORANGE_ADDRESS}" ]; then
		iptables -t nat -A NAT_DESTINATION_FIX \
			-m mark --mark 3 -j SNAT --to-source "${ORANGE_ADDRESS}"
	fi

	# upnp chain for our upnp daemon
	iptables -t nat -N UPNPFW
	iptables -t nat -A PREROUTING -j UPNPFW
	iptables -N UPNPFW
	iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW

	# RED chain, used for the red interface
	iptables -N REDINPUT
	iptables -A INPUT -j REDINPUT
	iptables -N REDFORWARD
	iptables -A FORWARD -j REDFORWARD
	iptables -t nat -N REDNAT
	iptables -t nat -A POSTROUTING -j REDNAT

	# Filter logging of incoming broadcasts.
	iptables -N BROADCAST_FILTER
	iptables -A INPUT -j BROADCAST_FILTER

	iptables -A BROADCAST_FILTER -i "${GREEN_DEV}" -d "${GREEN_BROADCAST}" -j DROP

	if [ -n "${BLUE_DEV}" -a -n "${BLUE_BROADCAST}" ]; then
		iptables -A BROADCAST_FILTER -i "${BLUE_DEV}" -d "${BLUE_BROADCAST}" -j DROP
	fi

	if [ -n "${ORANGE_DEV}" -a -n "${ORANGE_BROADCAST}" ]; then
		iptables -A BROADCAST_FILTER -i "${ORANGE_DEV}" -d "${ORANGE_BROADCAST}" -j DROP
	fi

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

	# run wirelessctrl
	/usr/local/bin/wirelessctrl

	# 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
}

iptables_red() {
	iptables -F REDINPUT
	iptables -F REDFORWARD
	iptables -t nat -F REDNAT

	# PPPoE / PPTP Device
	if [ "$IFACE" != "" ]; then
		# PPPoE / PPTP
		if [ "$DEVICE" != "" ]; then
			iptables -A REDINPUT -i $DEVICE -j ACCEPT
		fi
		if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
			if [ "$RED_DEV" != "" ]; then
				iptables -A REDINPUT -i $RED_DEV -j ACCEPT
			fi
		fi
	fi

	# PPTP over DHCP
	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
		iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
		iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
	fi

	# Orange pinholes
	if [ "$ORANGE_DEV" != "" ]; then
		# This rule enables a host on ORANGE network to connect to the outside
		# (only if we have a red connection)
		if [ "$IFACE" != "" ]; then
			iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
		fi
	fi

	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
		# DHCP
		if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
			iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
			iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		fi
		if [ "$METHOD" == "DHCP"  -a "$PROTOCOL" == "RFC1483" ]; then
			iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
			iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		fi

		# Outgoing masquerading (don't masqerade IPSEC (mark 50))
		iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN

		if [ "$IFACE" != "$GREEN_DEV" ]; then
			iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
		fi

	fi

	# Reload all rules.
	/usr/local/bin/firewallctrl
}

# See how we were called.
case "$1" in
  start)
	boot_mesg "Loading firewall modules into the kernel"
	modprobe iptable_nat || failed=1
	for i in $(find /lib/modules/$(uname -r) -name nf_conntrack*); do
		modprobe $(basename $i | cut -d. -f1) || failed=1
	done
	for i in $(find /lib/modules/$(uname -r) -name nf_nat*); do
		modprobe $(basename $i | cut -d. -f1) || failed=1
	done
	(exit ${failed})
	evaluate_retval

	if [ -e /var/ipfire/main/disable_nf_sip ]; then
		rmmod nf_nat_sip
		rmmod nf_conntrack_sip
		rmmod nf_nat_h323
		rmmod nf_conntrack_h323
	fi

	boot_mesg "Setting up firewall"
	iptables_init
	evaluate_retval

	# run local firewall configuration, if present
	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local start
	fi
	;;
  reload)
	boot_mesg "Reloading firewall"
	iptables_red
	evaluate_retval

	# run local firewall configuration, if present
	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local reload
	fi
	;;
  restart)
	# run local firewall configuration, if present
	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local stop
	fi
	$0 start
	;;
  *)
        echo "Usage: $0 {start|reload|restart}"
        exit 1
	;;
esac

exit 0
Commit	Line	Data
3a1019f6 MT	1	#!/bin/sh
3a1019f6 MT	2
0f5c5ce7 MT	3	. /etc/sysconfig/rc
	4	. ${rc_functions}
	5
3a1019f6 MT	6	eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
3a1019f6 MT	7	eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
fe0cd647	8	eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
3a1019f6 MT	9	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
	10
	11	if [ -f /var/ipfire/red/device ]; then
	12	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	13	fi
	14
c581b670 MT	15	function iptables() {
	16	/sbin/iptables --wait "$@"
	17	}
	18
3a1019f6 MT	19	iptables_init() {
3a1019f6 MT	20	# Flush all rules and delete all custom chains
c581b670 MT	21	iptables -F
	22	iptables -t nat -F
	23	iptables -t mangle -F
	24	iptables -X
	25	iptables -t nat -X
	26	iptables -t mangle -X
3a1019f6 MT	27
3a1019f6 MT	28	# Set up policies
c581b670 MT	29	iptables -P INPUT DROP
	30	iptables -P FORWARD DROP
	31	iptables -P OUTPUT ACCEPT
3a1019f6 MT	32
3a1019f6 MT	33	# Empty LOG_DROP and LOG_REJECT chains
c581b670 MT	34	iptables -N LOG_DROP
	35	iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
	36	iptables -A LOG_DROP -j DROP
	37	iptables -N LOG_REJECT
	38	iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	39	iptables -A LOG_REJECT -j REJECT
3a1019f6 MT	40
	41	# This chain will log, then DROPs packets with certain bad combinations
	42	# of flags might indicate a port-scan attempt (xmas, null, etc)
c581b670	43	iptables -N PSCAN
5595bc03	44	if [ "$DROPPORTSCAN" == "on" ]; then
c581b670 MT	45	iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
	46	iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
	47	iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
	48	iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	49	fi
c581b670	50	iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	51
	52	# New tcp packets without SYN set - could well be an obscure type of port scan
	53	# that's not covered above, may just be a broken windows machine
c581b670	54	iptables -N NEWNOTSYN
5595bc03	55	if [ "$DROPNEWNOTSYN" == "on" ]; then
c581b670	56	iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	57	fi
c581b670	58	iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6 MT	59
3a1019f6 MT	60	# Chain to contain all the rules relating to bad TCP flags
c581b670	61	iptables -N BADTCP
3a1019f6	62
c581b670 MT	63	# Don't check loopback
c581b670 MT	64	iptables -A BADTCP -i lo -j RETURN
d8158ca6	65
3a1019f6 MT	66	# Disallow packets frequently used by port-scanners
3a1019f6 MT	67	# nmap xmas
c581b670	68	iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
3a1019f6	69	# Null
c581b670	70	iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
3a1019f6	71	# FIN
c581b670	72	iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
3a1019f6	73	# SYN/RST (also catches xmas variants that set SYN+RST+...)
c581b670	74	iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
3a1019f6	75	# SYN/FIN (QueSO or nmap OS probe)
c581b670	76	iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
3a1019f6	77	# NEW TCP without SYN
c581b670	78	iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
b85d2a98	79
c581b670 MT	80	iptables -A INPUT -p tcp -j BADTCP
c581b670 MT	81	iptables -A FORWARD -p tcp -j BADTCP
c0359d6d	82
b85d2a98	83	# Connection tracking chain
c581b670 MT	84	iptables -N CONNTRACK
c581b670 MT	85	iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
3a1019f6	86
3a1019f6	87	# Fix for braindead ISP's
c581b670	88	iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
3a1019f6 MT	89
3a1019f6 MT	90	# CUSTOM chains, can be used by the users themselves
c581b670 MT	91	iptables -N CUSTOMINPUT
	92	iptables -A INPUT -j CUSTOMINPUT
	93	iptables -N CUSTOMFORWARD
	94	iptables -A FORWARD -j CUSTOMFORWARD
	95	iptables -N CUSTOMOUTPUT
	96	iptables -A OUTPUT -j CUSTOMOUTPUT
	97	iptables -t nat -N CUSTOMPREROUTING
	98	iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	99	iptables -t nat -N CUSTOMPOSTROUTING
	100	iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
3a1019f6	101
815eaff4	102	# Guardian (IPS) chains
c581b670 MT	103	iptables -N GUARDIAN
	104	iptables -A INPUT -j GUARDIAN
	105	iptables -A FORWARD -j GUARDIAN
815eaff4	106
1e555330	107	# Block OpenVPN transfer networks
c581b670	108	iptables -N OVPNBLOCK
a0a5c14f	109	iptables -A INPUT -i tun+ -j OVPNBLOCK
a0a5c14f MT	110	iptables -A FORWARD -i tun+ -j OVPNBLOCK
a0a5c14f MT	111	iptables -A FORWARD -o tun+ -j OVPNBLOCK
1e555330	112
51ab1de1	113	# OpenVPN transfer network translation
c581b670 MT	114	iptables -t nat -N OVPNNAT
c581b670 MT	115	iptables -t nat -A POSTROUTING -j OVPNNAT
51ab1de1	116
daa1ceba	117	# IPTV chains for IGMPPROXY
c581b670 MT	118	iptables -N IPTVINPUT
	119	iptables -A INPUT -j IPTVINPUT
	120	iptables -N IPTVFORWARD
	121	iptables -A FORWARD -j IPTVFORWARD
daa1ceba	122
8e59a602 MT	123	# Allow to ping the firewall.
	124	iptables -N ICMPINPUT
	125	iptables -A INPUT -j ICMPINPUT
	126	iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6	127
afc611d4	128	# Accept everything on loopback
c581b670 MT	129	iptables -N LOOPBACK
	130	iptables -A LOOPBACK -i lo -j ACCEPT
	131	iptables -A LOOPBACK -o lo -j ACCEPT
afc611d4	132
3b9a23ce	133	# Filter all packets with loopback addresses on non-loopback interfaces.
c581b670 MT	134	iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
c581b670 MT	135	iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP
3b9a23ce MT	136
3b9a23ce MT	137	for i in INPUT FORWARD OUTPUT; do
c581b670	138	iptables -A ${i} -j LOOPBACK
3b9a23ce	139	done
afc611d4	140
3a1019f6	141	# Accept everything connected
b85d2a98	142	for i in INPUT FORWARD OUTPUT; do
c581b670	143	iptables -A ${i} -j CONNTRACK
b85d2a98 MT	144	done
b85d2a98 MT	145
8490e496 MT	146	# Allow DHCP
	147	iptables -N DHCPINPUT
	148	iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
	149	iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
	150
	151	iptables -N DHCPOUTPUT
	152	iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
	153	iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
	154
	155	# Allow DHCP on GREEN
	156	iptables -N DHCPGREENINPUT
	157	iptables -N DHCPGREENOUTPUT
	158	if [ -n "${GREEN_DEV}" ]; then
	159	iptables -A INPUT -i "${GREEN_DEV}" -j DHCPGREENINPUT
	160	iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
	161	fi
	162
	163	# allow DHCP on BLUE to be turned on/off
	164	iptables -N DHCPBLUEINPUT
	165	iptables -N DHCPBLUEOUTPUT
	166	if [ -n "${BLUE_DEV}" ]; then
	167	iptables -A INPUT -i "${BLUE_DEV}" -j DHCPBLUEINPUT
	168	iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
	169	fi
	170
5fd30232	171	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
c581b670 MT	172	iptables -N IPSECINPUT
	173	iptables -N IPSECFORWARD
	174	iptables -N IPSECOUTPUT
	175	iptables -A INPUT -j IPSECINPUT
	176	iptables -A FORWARD -j IPSECFORWARD
	177	iptables -A OUTPUT -j IPSECOUTPUT
	178	iptables -t nat -N IPSECNAT
	179	iptables -t nat -A POSTROUTING -j IPSECNAT
b68e5c14	180
3a1019f6	181	# localhost and ethernet.
c581b670	182	iptables -A INPUT -i $GREEN_DEV -m conntrack --ctstate NEW -j ACCEPT ! -p icmp
8490e496	183
81393987	184	# WIRELESS chains
c581b670 MT	185	iptables -N WIRELESSINPUT
	186	iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
	187	iptables -N WIRELESSFORWARD
	188	iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
987b75bc	189
ab4876ad	190	# OpenVPN
c581b670 MT	191	iptables -N OVPNINPUT
c581b670 MT	192	iptables -A INPUT -j OVPNINPUT
ab4876ad	193
987b75bc	194	# TOR
c581b670 MT	195	iptables -N TOR_INPUT
c581b670 MT	196	iptables -A INPUT -j TOR_INPUT
12dcfbbd	197
d5f1422d	198	# Jump into the actual firewall ruleset.
c581b670 MT	199	iptables -N INPUTFW
c581b670 MT	200	iptables -A INPUT -j INPUTFW
d5f1422d	201
c581b670 MT	202	iptables -N OUTGOINGFW
c581b670 MT	203	iptables -A OUTPUT -j OUTGOINGFW
d5f1422d	204
c581b670 MT	205	iptables -N FORWARDFW
c581b670 MT	206	iptables -A FORWARD -j FORWARDFW
d5f1422d	207
fac38614	208	# SNAT rules
c581b670 MT	209	iptables -t nat -N NAT_SOURCE
c581b670 MT	210	iptables -t nat -A POSTROUTING -j NAT_SOURCE
fac38614	211
bb12dd7b	212	# Custom prerouting chains (for transparent proxy)
c581b670 MT	213	iptables -t nat -N SQUID
c581b670 MT	214	iptables -t nat -A PREROUTING -j SQUID
bb12dd7b MT	215
bb12dd7b MT	216	# DNAT rules
c581b670 MT	217	iptables -t nat -N NAT_DESTINATION
c581b670 MT	218	iptables -t nat -A PREROUTING -j NAT_DESTINATION
99f11a16	219	iptables -t nat -A OUTPUT -j NAT_DESTINATION
bb12dd7b	220
6e87f0aa MT	221	iptables -t mangle -N NAT_DESTINATION
	222	iptables -t mangle -A PREROUTING -j NAT_DESTINATION
	223
	224	iptables -t nat -N NAT_DESTINATION_FIX
	225	iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
	226
	227	iptables -t nat -A NAT_DESTINATION_FIX \
	228	-m mark --mark 1 -j SNAT --to-source "${GREEN_ADDRESS}"
	229
	230	if [ -n "${BLUE_ADDRESS}" ]; then
	231	iptables -t nat -A NAT_DESTINATION_FIX \
	232	-m mark --mark 2 -j SNAT --to-source "${BLUE_ADDRESS}"
	233	fi
	234
	235	if [ -n "${ORANGE_ADDRESS}" ]; then
	236	iptables -t nat -A NAT_DESTINATION_FIX \
	237	-m mark --mark 3 -j SNAT --to-source "${ORANGE_ADDRESS}"
	238	fi
	239
7e7495b3	240	# upnp chain for our upnp daemon
c581b670 MT	241	iptables -t nat -N UPNPFW
	242	iptables -t nat -A PREROUTING -j UPNPFW
	243	iptables -N UPNPFW
	244	iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW
3a1019f6	245
6e87f0aa MT	246	# RED chain, used for the red interface
	247	iptables -N REDINPUT
	248	iptables -A INPUT -j REDINPUT
	249	iptables -N REDFORWARD
	250	iptables -A FORWARD -j REDFORWARD
	251	iptables -t nat -N REDNAT
	252	iptables -t nat -A POSTROUTING -j REDNAT
	253
63f2fb7f MT	254	# Filter logging of incoming broadcasts.
	255	iptables -N BROADCAST_FILTER
	256	iptables -A INPUT -j BROADCAST_FILTER
	257
	258	iptables -A BROADCAST_FILTER -i "${GREEN_DEV}" -d "${GREEN_BROADCAST}" -j DROP
	259
	260	if [ -n "${BLUE_DEV}" -a -n "${BLUE_BROADCAST}" ]; then
	261	iptables -A BROADCAST_FILTER -i "${BLUE_DEV}" -d "${BLUE_BROADCAST}" -j DROP
	262	fi
	263
	264	if [ -n "${ORANGE_DEV}" -a -n "${ORANGE_BROADCAST}" ]; then
	265	iptables -A BROADCAST_FILTER -i "${ORANGE_DEV}" -d "${ORANGE_BROADCAST}" -j DROP
	266	fi
	267
ab4876ad MT	268	# Apply OpenVPN firewall rules
ab4876ad MT	269	/usr/local/bin/openvpnctrl --firewall-rules
ff4770c7 AM	270
	271	# run wirelessctrl
	272	/usr/local/bin/wirelessctrl
	273
c581b670 MT	274	# POLICY CHAIN
	275	iptables -N POLICYIN
	276	iptables -A INPUT -j POLICYIN
	277	iptables -N POLICYFWD
	278	iptables -A FORWARD -j POLICYFWD
	279	iptables -N POLICYOUT
	280	iptables -A OUTPUT -j POLICYOUT
b324de14	281
bb383423	282	# Initialize firewall policies.
5d7faa45	283	/usr/sbin/firewall-policy
690b0bd7	284
bb383423 MT	285	# Install firewall rules for the red interface.
bb383423 MT	286	iptables_red
ff4770c7	287	}
3a1019f6	288
ff4770c7	289	iptables_red() {
c581b670 MT	290	iptables -F REDINPUT
	291	iptables -F REDFORWARD
	292	iptables -t nat -F REDNAT
3a1019f6	293
ff4770c7 AM	294	# PPPoE / PPTP Device
	295	if [ "$IFACE" != "" ]; then
	296	# PPPoE / PPTP
	297	if [ "$DEVICE" != "" ]; then
c581b670	298	iptables -A REDINPUT -i $DEVICE -j ACCEPT
ff4770c7 AM	299	fi
	300	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	301	if [ "$RED_DEV" != "" ]; then
c581b670	302	iptables -A REDINPUT -i $RED_DEV -j ACCEPT
ff4770c7 AM	303	fi
ff4770c7 AM	304	fi
3a1019f6	305	fi
ff4770c7 AM	306
	307	# PPTP over DHCP
	308	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
c581b670 MT	309	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
c581b670 MT	310	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
3a1019f6 MT	311	fi
3a1019f6 MT	312
ff4770c7 AM	313	# Orange pinholes
	314	if [ "$ORANGE_DEV" != "" ]; then
	315	# This rule enables a host on ORANGE network to connect to the outside
	316	# (only if we have a red connection)
	317	if [ "$IFACE" != "" ]; then
c581b670	318	iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
ff4770c7	319	fi
3a1019f6	320	fi
c400fe4c	321
ff4770c7 AM	322	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	323	# DHCP
	324	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
c581b670 MT	325	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	326	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	327	fi
ff4770c7 AM	328	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
c581b670 MT	329	iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
c581b670 MT	330	iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
ff4770c7 AM	331	fi
	332
	333	# Outgoing masquerading (don't masqerade IPSEC (mark 50))
c581b670	334	iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
c926c637 AF	335
	336	if [ "$IFACE" != "$GREEN_DEV" ]; then
	337	iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
	338	fi
c400fe4c	339
6be0579b	340	fi
66f6b279 MT	341
66f6b279 MT	342	# Reload all rules.
55a5bcae	343	/usr/local/bin/firewallctrl
ff4770c7 AM	344	}
	345
	346	# See how we were called.
	347	case "$1" in
	348	start)
cdb725da MT	349	boot_mesg "Loading firewall modules into the kernel"
	350	modprobe iptable_nat \|\| failed=1
	351	for i in $(find /lib/modules/$(uname -r) -name nf_conntrack*); do
	352	modprobe $(basename $i \| cut -d. -f1) \|\| failed=1
	353	done
	354	for i in $(find /lib/modules/$(uname -r) -name nf_nat*); do
	355	modprobe $(basename $i \| cut -d. -f1) \|\| failed=1
	356	done
	357	(exit ${failed})
	358	evaluate_retval
	359
	360	if [ -e /var/ipfire/main/disable_nf_sip ]; then
	361	rmmod nf_nat_sip
	362	rmmod nf_conntrack_sip
	363	rmmod nf_nat_h323
	364	rmmod nf_conntrack_h323
	365	fi
	366
7d7740a4	367	boot_mesg "Setting up firewall"
ff4770c7	368	iptables_init
7d7740a4 MT	369	evaluate_retval
7d7740a4 MT	370
159c55c5 MT	371	# run local firewall configuration, if present
	372	if [ -x /etc/sysconfig/firewall.local ]; then
	373	/etc/sysconfig/firewall.local start
	374	fi
6be0579b	375	;;
3a1019f6	376	reload)
7d7740a4	377	boot_mesg "Reloading firewall"
3a1019f6	378	iptables_red
7d7740a4 MT	379	evaluate_retval
7d7740a4 MT	380
3a1019f6	381	# run local firewall configuration, if present
ff4770c7	382	if [ -x /etc/sysconfig/firewall.local ]; then
3a1019f6 MT	383	/etc/sysconfig/firewall.local reload
	384	fi
	385	;;
	386	restart)
ff4770c7 AM	387	# run local firewall configuration, if present
	388	if [ -x /etc/sysconfig/firewall.local ]; then
	389	/etc/sysconfig/firewall.local stop
	390	fi
3a1019f6 MT	391	$0 start
	392	;;
	393	*)
ff4770c7	394	echo "Usage: $0 {start\|reload\|restart}"
3a1019f6 MT	395	exit 1
	396	;;
	397	esac
	398
	399	exit 0