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