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

#!/bin/sh

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

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

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

	# Empty LOG_DROP and LOG_REJECT chains
	/sbin/iptables -N LOG_DROP
	/sbin/iptables -A LOG_DROP   -m limit --limit 10/minute -j LOG
	/sbin/iptables -A LOG_DROP   -j DROP
	/sbin/iptables -N LOG_REJECT
	/sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	/sbin/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)
	/sbin/iptables -N PSCAN
	if [ "$DROPPORTSCAN" == "on" ]; then
		/sbin/iptables -A PSCAN -p tcp  -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
		/sbin/iptables -A PSCAN -p udp  -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
		/sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
		/sbin/iptables -A PSCAN -f      -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
	fi
	/sbin/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
	/sbin/iptables -N NEWNOTSYN
	if [ "$DROPNEWNOTSYN" == "on" ]; then
		/sbin/iptables -A NEWNOTSYN  -m limit --limit 10/minute -j LOG  --log-prefix "DROP_NEWNOTSYN "
	fi
	/sbin/iptables -A NEWNOTSYN  -j DROP -m comment --comment "DROP_NEWNOTSYN"

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

	# Disallow packets frequently used by port-scanners
	# nmap xmas
	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH  -j PSCAN
	# Null
	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
	# FIN
	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
	# SYN/RST (also catches xmas variants that set SYN+RST+...)
	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
	# SYN/FIN (QueSO or nmap OS probe)
	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
	# NEW TCP without SYN
	/sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN

	/sbin/iptables -A INPUT   -j BADTCP
	/sbin/iptables -A FORWARD -j BADTCP

}

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

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

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

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

		# Outgoing masquerading
		/sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE

	fi
}

# See how we were called.
case "$1" in
  start)
	iptables_init

	# Limit Packets- helps reduce dos/syn attacks
	# original do nothing line
	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec
	# the correct one, but the negative '!' do nothing...
	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit ! --limit 10/sec -j DROP

	# Fix for braindead ISP's
	/sbin/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
	/sbin/iptables -N CUSTOMINPUT
	/sbin/iptables -A INPUT -j CUSTOMINPUT
	/sbin/iptables -N CUSTOMFORWARD
	/sbin/iptables -A FORWARD -j CUSTOMFORWARD
	/sbin/iptables -N CUSTOMOUTPUT
	/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
	/sbin/iptables -N OUTGOINGFW
	/sbin/iptables -A OUTPUT -j OUTGOINGFW
	/sbin/iptables -t nat -N CUSTOMPREROUTING
	/sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	/sbin/iptables -t nat -N CUSTOMPOSTROUTING
	/sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING

	# filtering from GUI
	/sbin/iptables -N GUIINPUT
	/sbin/iptables -A INPUT -j GUIINPUT
	/sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT

	# Accept everything connected
	/sbin/iptables -A INPUT   -m state --state ESTABLISHED,RELATED -j ACCEPT
	/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
	
	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
	/sbin/iptables -N IPSECVIRTUAL
	/sbin/iptables -N OPENSSLVIRTUAL
	/sbin/iptables -A INPUT -j IPSECVIRTUAL -m comment --comment "IPSECVIRTUAL INPUT"
	/sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT"
	/sbin/iptables -A FORWARD -j IPSECVIRTUAL -m comment --comment "IPSECVIRTUAL FORWARD"
	/sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD"
	
	# Outgoing Firewall
	/sbin/iptables -A FORWARD -j OUTGOINGFW

	# localhost and ethernet.
	/sbin/iptables -A INPUT   -i lo          -m state --state NEW -j ACCEPT
	/sbin/iptables -A INPUT   -s 127.0.0.0/8 -m state --state NEW -j DROP   # Loopback not on lo
	/sbin/iptables -A INPUT   -d 127.0.0.0/8 -m state --state NEW -j DROP
	/sbin/iptables -A FORWARD -i lo          -m state --state NEW -j ACCEPT
	/sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
	/sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
	/sbin/iptables -A INPUT   -i $GREEN_DEV  -m state --state NEW -j ACCEPT -p ! icmp
	/sbin/iptables -A FORWARD -i $GREEN_DEV  -m state --state NEW -j ACCEPT

	# If a host on orange tries to initiate a connection to IPFire's red IP and
	# the connection gets DNATed back through a port forward to a server on orange
	# we end up with orange -> orange traffic passing through IPFire
	[ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT

	# allow DHCP on BLUE to be turned on/off
	/sbin/iptables -N DHCPBLUEINPUT 
	/sbin/iptables -A INPUT -j DHCPBLUEINPUT

	# IPSec
	/sbin/iptables -N IPSECPHYSICAL
	/sbin/iptables -A INPUT -j IPSECPHYSICAL

	# OPenSSL
	/sbin/iptables -N OPENSSLPHYSICAL
	/sbin/iptables -A INPUT -j OPENSSLPHYSICAL

	# WIRELESS chains
	/sbin/iptables -N WIRELESSINPUT
	/sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT
	/sbin/iptables -N WIRELESSFORWARD
	/sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD

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

	iptables_red

	# DMZ pinhole chain.  setdmzholes setuid prog adds rules here to allow
	# ORANGE to talk to GREEN / BLUE.
	/sbin/iptables -N DMZHOLES
	if [ "$ORANGE_DEV" != "" ]; then
		/sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES
	fi

	# XTACCESS chain, used for external access
	/sbin/iptables -N XTACCESS
	/sbin/iptables -A INPUT -m state --state NEW -j XTACCESS

	# PORTFWACCESS chain, used for portforwarding
	/sbin/iptables -N PORTFWACCESS
	/sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS

	# Custom prerouting chains (for transparent proxy and port forwarding)
	/sbin/iptables -t nat -N SQUID
	/sbin/iptables -t nat -A PREROUTING -j SQUID
	/sbin/iptables -t nat -N PORTFW
	/sbin/iptables -t nat -A PREROUTING -j PORTFW

	# upnp chain for our upnp daemon
	/sbin/iptables -t nat -N UPNPFW
	/sbin/iptables -t nat -A PREROUTING -j UPNPFW


	# Custom mangle chain (for port fowarding)
	/sbin/iptables -t mangle -N PORTFWMANGLE
	/sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE

	# Postrouting rules (for port forwarding)
	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \
	 --to-source $GREEN_ADDRESS
	if [ "$BLUE_DEV" != "" ]; then
		/sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS
	fi
	if [ "$ORANGE_DEV" != "" ]; then
		/sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS
	fi

	# run local firewall configuration, if present
 	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local start
	fi
	
	# last rule in input and forward chain is for logging.

	if [ "$DROPINPUT" == "on" ]; then
		/sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
	fi
	/sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
	if [ "$DROPOUTPUT" == "on" ]; then
		/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
	fi
	/sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT"
        ;;
  startovpn)  
	# run openvpn
	/usr/local/bin/openvpnctrl --create-chains-and-rules
        ;;
  stop)
	iptables_init
	# Accept everyting connected
	/sbin/iptables -A INPUT   -m state --state ESTABLISHED,RELATED -j ACCEPT

	# localhost and ethernet.
	/sbin/iptables -A INPUT -i lo -j ACCEPT
	/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT

	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
		/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	fi
	if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
		/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
		/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	fi

	# run local firewall configuration, if present
 	if [ -x /etc/sysconfig/firewall.local ]; then
		/etc/sysconfig/firewall.local stop
	fi

	if [ "$DROPINPUT" == "on" ]; then
		/sbin/iptables -A INPUT   -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
	fi
	/sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
	if [ "$DROPOUTPUT" == "on" ]; then
		/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
	fi
	/sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT"
        ;;
  stopovpn)
	# stop openvpn
	/usr/local/bin/openvpnctrl --delete-chains-and-rules
        ;;
  reload)
	iptables_red

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

exit 0
Commit	Line	Data
3a1019f6 MT	1	#!/bin/sh
	2
	3	eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
	4	eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
fe0cd647	5	eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
3a1019f6 MT	6	IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null \| /usr/bin/tr -d '\012'`
	7
	8	if [ -f /var/ipfire/red/device ]; then
	9	DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null \| /usr/bin/tr -d '\012'`
	10	fi
	11
	12	iptables_init() {
	13	# Flush all rules and delete all custom chains
	14	/sbin/iptables -F
	15	/sbin/iptables -t nat -F
	16	/sbin/iptables -t mangle -F
	17	/sbin/iptables -X
	18	/sbin/iptables -t nat -X
	19	/sbin/iptables -t mangle -X
	20
	21	# Set up policies
	22	/sbin/iptables -P INPUT DROP
	23	/sbin/iptables -P FORWARD DROP
	24	/sbin/iptables -P OUTPUT ACCEPT
	25
	26	# Empty LOG_DROP and LOG_REJECT chains
	27	/sbin/iptables -N LOG_DROP
	28	/sbin/iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
	29	/sbin/iptables -A LOG_DROP -j DROP
	30	/sbin/iptables -N LOG_REJECT
	31	/sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
	32	/sbin/iptables -A LOG_REJECT -j REJECT
	33
	34	# This chain will log, then DROPs packets with certain bad combinations
	35	# of flags might indicate a port-scan attempt (xmas, null, etc)
	36	/sbin/iptables -N PSCAN
5595bc03	37	if [ "$DROPPORTSCAN" == "on" ]; then
97fe1741	38	/sbin/iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
fe0cd647	39	/sbin/iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
97fe1741 CS	40	/sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
97fe1741 CS	41	/sbin/iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
5595bc03	42	fi
97fe1741	43	/sbin/iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
3a1019f6 MT	44
	45	# New tcp packets without SYN set - could well be an obscure type of port scan
	46	# that's not covered above, may just be a broken windows machine
	47	/sbin/iptables -N NEWNOTSYN
5595bc03	48	if [ "$DROPNEWNOTSYN" == "on" ]; then
97fe1741	49	/sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
5595bc03	50	fi
97fe1741	51	/sbin/iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
3a1019f6 MT	52
	53	# Chain to contain all the rules relating to bad TCP flags
	54	/sbin/iptables -N BADTCP
	55
	56	# Disallow packets frequently used by port-scanners
	57	# nmap xmas
	58	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
	59	# Null
	60	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
	61	# FIN
	62	/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
	63	# SYN/RST (also catches xmas variants that set SYN+RST+...)
	64	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
	65	# SYN/FIN (QueSO or nmap OS probe)
	66	/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
	67	# NEW TCP without SYN
	68	/sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN
	69
	70	/sbin/iptables -A INPUT -j BADTCP
	71	/sbin/iptables -A FORWARD -j BADTCP
	72
	73	}
	74
	75	iptables_red() {
	76	/sbin/iptables -F REDINPUT
	77	/sbin/iptables -F REDFORWARD
	78	/sbin/iptables -t nat -F REDNAT
	79
	80	# PPPoE / PPTP Device
	81	if [ "$IFACE" != "" ]; then
	82	# PPPoE / PPTP
	83	if [ "$DEVICE" != "" ]; then
	84	/sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT
	85	fi
	86	if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
	87	if [ "$RED_DEV" != "" ]; then
	88	/sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT
	89	fi
	90	fi
	91	fi
	92
	93	# PPTP over DHCP
	94	if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
	95	/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
	96	/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
	97	fi
	98
	99	# Orange pinholes
	100	if [ "$ORANGE_DEV" != "" ]; then
	101	# This rule enables a host on ORANGE network to connect to the outside
	102	# (only if we have a red connection)
	103	if [ "$IFACE" != "" ]; then
	104	/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p tcp -o $IFACE -j ACCEPT
	105	/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p udp -o $IFACE -j ACCEPT
	106	fi
	107	fi
	108
	109	if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
	110	# DHCP
	111	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
	112	/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	113	/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	114	fi
	115	if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
116	/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
117	/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
118	fi
119
120	# Outgoing masquerading
121	/sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
122
123	fi
124	}
125
126	# See how we were called.
127	case "$1" in
128	start)
129	iptables_init
130
131	# Limit Packets- helps reduce dos/syn attacks
132	# original do nothing line
133	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec
134	# the correct one, but the negative '!' do nothing...
135	#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit ! --limit 10/sec -j DROP
136
137	# Fix for braindead ISP's
138	/sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
139
140	# CUSTOM chains, can be used by the users themselves
141	/sbin/iptables -N CUSTOMINPUT
142	/sbin/iptables -A INPUT -j CUSTOMINPUT
143	/sbin/iptables -N CUSTOMFORWARD
144	/sbin/iptables -A FORWARD -j CUSTOMFORWARD
145	/sbin/iptables -N CUSTOMOUTPUT
146	/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
4cb74dce MT	147	/sbin/iptables -N OUTGOINGFW
4cb74dce MT	148	/sbin/iptables -A OUTPUT -j OUTGOINGFW
3a1019f6 MT	149	/sbin/iptables -t nat -N CUSTOMPREROUTING
	150	/sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
	151	/sbin/iptables -t nat -N CUSTOMPOSTROUTING
	152	/sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
	153
	154	# filtering from GUI
	155	/sbin/iptables -N GUIINPUT
	156	/sbin/iptables -A INPUT -j GUIINPUT
905fbf3e	157	/sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT
3a1019f6 MT	158
	159	# Accept everything connected
	160	/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
	161	/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
5fd30232 MT	162
	163	# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
	164	/sbin/iptables -N IPSECVIRTUAL
	165	/sbin/iptables -N OPENSSLVIRTUAL
5595bc03 CS	166	/sbin/iptables -A INPUT -j IPSECVIRTUAL -m comment --comment "IPSECVIRTUAL INPUT"
	167	/sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT"
	168	/sbin/iptables -A FORWARD -j IPSECVIRTUAL -m comment --comment "IPSECVIRTUAL FORWARD"
	169	/sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD"
4cb74dce MT	170
	171	# Outgoing Firewall
	172	/sbin/iptables -A FORWARD -j OUTGOINGFW
3a1019f6 MT	173
	174	# localhost and ethernet.
	175	/sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
	176	/sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo
	177	/sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP
	178	/sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
	179	/sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
	180	/sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
	181	/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT -p ! icmp
	182	/sbin/iptables -A FORWARD -i $GREEN_DEV -m state --state NEW -j ACCEPT
	183
	184	# If a host on orange tries to initiate a connection to IPFire's red IP and
	185	# the connection gets DNATed back through a port forward to a server on orange
	186	# we end up with orange -> orange traffic passing through IPFire
	187	[ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT
	188
3a1019f6 MT	189	# allow DHCP on BLUE to be turned on/off
	190	/sbin/iptables -N DHCPBLUEINPUT
	191	/sbin/iptables -A INPUT -j DHCPBLUEINPUT
	192
5fd30232 MT	193	# IPSec
	194	/sbin/iptables -N IPSECPHYSICAL
	195	/sbin/iptables -A INPUT -j IPSECPHYSICAL
	196
	197	# OPenSSL
	198	/sbin/iptables -N OPENSSLPHYSICAL
	199	/sbin/iptables -A INPUT -j OPENSSLPHYSICAL
3a1019f6 MT	200
	201	# WIRELESS chains
	202	/sbin/iptables -N WIRELESSINPUT
	203	/sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT
	204	/sbin/iptables -N WIRELESSFORWARD
	205	/sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD
	206
	207	# RED chain, used for the red interface
	208	/sbin/iptables -N REDINPUT
	209	/sbin/iptables -A INPUT -j REDINPUT
	210	/sbin/iptables -N REDFORWARD
	211	/sbin/iptables -A FORWARD -j REDFORWARD
	212	/sbin/iptables -t nat -N REDNAT
	213	/sbin/iptables -t nat -A POSTROUTING -j REDNAT
	214
	215	iptables_red
	216
	217	# DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow
	218	# ORANGE to talk to GREEN / BLUE.
	219	/sbin/iptables -N DMZHOLES
	220	if [ "$ORANGE_DEV" != "" ]; then
	221	/sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES
	222	fi
	223
	224	# XTACCESS chain, used for external access
	225	/sbin/iptables -N XTACCESS
	226	/sbin/iptables -A INPUT -m state --state NEW -j XTACCESS
	227
	228	# PORTFWACCESS chain, used for portforwarding
	229	/sbin/iptables -N PORTFWACCESS
	230	/sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS
	231
	232	# Custom prerouting chains (for transparent proxy and port forwarding)
	233	/sbin/iptables -t nat -N SQUID
	234	/sbin/iptables -t nat -A PREROUTING -j SQUID
	235	/sbin/iptables -t nat -N PORTFW
	236	/sbin/iptables -t nat -A PREROUTING -j PORTFW
	237
7e7495b3 MT	238	# upnp chain for our upnp daemon
	239	/sbin/iptables -t nat -N UPNPFW
	240	/sbin/iptables -t nat -A PREROUTING -j UPNPFW
	241
3a1019f6 MT	242
	243	# Custom mangle chain (for port fowarding)
	244	/sbin/iptables -t mangle -N PORTFWMANGLE
	245	/sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE
	246
	247	# Postrouting rules (for port forwarding)
	248	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \
	249	--to-source $GREEN_ADDRESS
	250	if [ "$BLUE_DEV" != "" ]; then
	251	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS
	252	fi
	253	if [ "$ORANGE_DEV" != "" ]; then
	254	/sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS
	255	fi
	256
3a1019f6 MT	257	# run local firewall configuration, if present
	258	if [ -x /etc/sysconfig/firewall.local ]; then
	259	/etc/sysconfig/firewall.local start
	260	fi
	261
	262	# last rule in input and forward chain is for logging.
5595bc03 CS	263
5595bc03 CS	264	if [ "$DROPINPUT" == "on" ]; then
97fe1741	265	/sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
5595bc03	266	fi
97fe1741	267	/sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
5595bc03	268	if [ "$DROPOUTPUT" == "on" ]; then
97fe1741	269	/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
5595bc03	270	fi
97fe1741	271	/sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT"
3a1019f6	272	;;
13211b21 CS	273	startovpn)
	274	# run openvpn
	275	/usr/local/bin/openvpnctrl --create-chains-and-rules
	276	;;
3a1019f6 MT	277	stop)
	278	iptables_init
	279	# Accept everyting connected
	280	/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
	281
	282	# localhost and ethernet.
	283	/sbin/iptables -A INPUT -i lo -j ACCEPT
	284	/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT
	285
	286	if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
	287	/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	288	/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	289	fi
	290	if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
	291	/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	292	/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
	293	fi
	294
3a1019f6 MT	295	# run local firewall configuration, if present
	296	if [ -x /etc/sysconfig/firewall.local ]; then
	297	/etc/sysconfig/firewall.local stop
	298	fi
	299
5595bc03	300	if [ "$DROPINPUT" == "on" ]; then
97fe1741	301	/sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
5595bc03	302	fi
97fe1741	303	/sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
5595bc03	304	if [ "$DROPOUTPUT" == "on" ]; then
97fe1741	305	/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
5595bc03	306	fi
97fe1741	307	/sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT"
3a1019f6	308	;;
13211b21 CS	309	stopovpn)
	310	# stop openvpn
	311	/usr/local/bin/openvpnctrl --delete-chains-and-rules
	312	;;
3a1019f6 MT	313	reload)
	314	iptables_red
	315
	316	# run local firewall configuration, if present
	317	if [ -x /etc/sysconfig/firewall.local ]; then
	318	/etc/sysconfig/firewall.local reload
	319	fi
	320	;;
	321	restart)
	322	$0 stop
	323	$0 start
	324	;;
	325	*)
	326	echo "Usage: $0 {start\|stop\|reload\|restart}"
	327	exit 1
	328	;;
	329	esac
	330
	331	exit 0