[ipfire-2.x.git] / config / firewall / ipsec-block

#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2015 IPFire Team                                              #
#                                                                             #
# 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/>.       #
#                                                                             #
###############################################################################

VPN_CONFIG="/var/ipfire/vpn/config"

block_subnet() {
	local subnet="${1}"
	local action="${2}"

	# Don't block a wildcard subnet
	if [ "${subnet}" = "0.0.0.0/0" ] || [ "${subnet}" = "0.0.0.0/0.0.0.0" ]; then
		return 0
	fi

	case "${action}" in
		reject)
			iptables -A IPSECBLOCK -d "${subnet}" -j REJECT --reject-with icmp-net-unreachable
			;;
		drop)
			iptables -A IPSECBLOCK -d "${subnet}" -j DROP
			;;
		*)
			return 1
			;;
	esac

	return 0
}

block_ipsec() {
	# Flush all exists rules
	iptables -F IPSECBLOCK

	local action

	local vars="id status name lefthost type ctype x1 x2 x3 leftsubnets"
	vars="${vars} x4 righthost rightsubnets x5 x6 x7 x8 x9 x10 x11 x12"
	vars="${vars} x13 x14 x15 x16 x17 x18 x19 x20 x21 proto x22 x23 x24"
	vars="${vars} route rest"

	# Register local variables
	local ${vars}

	while IFS="," read -r ${vars}; do
		# Check if the connection is enabled
		[ "${status}" = "on" ] || continue

		# Check if this a net-to-net connection
		[ "${type}" = "net" ] || continue

		# Split multiple subnets
		rightsubnets="${rightsubnets//\|/ }"

		case "${route}" in
			route)
				action="drop"
				;;
			*)
				action="reject"
				;;
		esac

		local rightsubnet
		for rightsubnet in ${rightsubnets}; do
			block_subnet "${rightsubnet}" "${action}"
		done
	done < "${VPN_CONFIG}"
}

block_ipsec || exit $?
Commit	Line	Data
80fbd899 MT	1	#!/bin/bash
	2	###############################################################################
	3	# #
	4	# IPFire.org - A linux based firewall #
	5	# Copyright (C) 2015 IPFire Team #
	6	# #
	7	# This program is free software: you can redistribute it and/or modify #
	8	# it under the terms of the GNU General Public License as published by #
	9	# the Free Software Foundation, either version 3 of the License, or #
	10	# (at your option) any later version. #
	11	# #
	12	# This program is distributed in the hope that it will be useful, #
	13	# but WITHOUT ANY WARRANTY; without even the implied warranty of #
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
	15	# GNU General Public License for more details. #
	16	# #
	17	# You should have received a copy of the GNU General Public License #
	18	# along with this program. If not, see <http://www.gnu.org/licenses/>. #
	19	# #
	20	###############################################################################
	21
	22	VPN_CONFIG="/var/ipfire/vpn/config"
	23
	24	block_subnet() {
	25	local subnet="${1}"
cda384a2	26	local action="${2}"
80fbd899 MT	27
	28	# Don't block a wildcard subnet
	29	if [ "${subnet}" = "0.0.0.0/0" ] \|\| [ "${subnet}" = "0.0.0.0/0.0.0.0" ]; then
	30	return 0
	31	fi
	32
cda384a2 MT	33	case "${action}" in
	34	reject)
	35	iptables -A IPSECBLOCK -d "${subnet}" -j REJECT --reject-with icmp-net-unreachable
	36	;;
	37	drop)
	38	iptables -A IPSECBLOCK -d "${subnet}" -j DROP
	39	;;
	40	*)
	41	return 1
	42	;;
	43	esac
	44
	45	return 0
80fbd899 MT	46	}
	47
	48	block_ipsec() {
	49	# Flush all exists rules
	50	iptables -F IPSECBLOCK
	51
cda384a2 MT	52	local action
	53
	54	local vars="id status name lefthost type ctype x1 x2 x3 leftsubnets"
	55	vars="${vars} x4 righthost rightsubnets x5 x6 x7 x8 x9 x10 x11 x12"
	56	vars="${vars} x13 x14 x15 x16 x17 x18 x19 x20 x21 proto x22 x23 x24"
	57	vars="${vars} route rest"
	58
	59	# Register local variables
	60	local ${vars}
	61
	62	while IFS="," read -r ${vars}; do
80fbd899 MT	63	# Check if the connection is enabled
	64	[ "${status}" = "on" ] \|\| continue
	65
	66	# Check if this a net-to-net connection
	67	[ "${type}" = "net" ] \|\| continue
	68
	69	# Split multiple subnets
	70	rightsubnets="${rightsubnets//\\|/ }"
	71
cda384a2 MT	72	case "${route}" in
	73	route)
	74	action="drop"
	75	;;
	76	*)
	77	action="reject"
	78	;;
	79	esac
	80
80fbd899 MT	81	local rightsubnet
80fbd899 MT	82	for rightsubnet in ${rightsubnets}; do
cda384a2	83	block_subnet "${rightsubnet}" "${action}"
80fbd899 MT	84	done
	85	done < "${VPN_CONFIG}"
	86	}
	87
	88	block_ipsec \|\| exit $?