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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 | ||
6c920b19 MT |
24 | VARS=( |
25 | id status name lefthost type ctype x1 x2 x3 leftsubnets | |
26 | x4 righthost rightsubnets x5 x6 x7 x8 x9 x10 x11 x12 | |
27 | x13 x14 x15 x16 x17 x18 x19 x20 x21 proto x22 x23 x24 | |
28 | route rest | |
29 | ) | |
30 | ||
80fbd899 MT |
31 | block_subnet() { |
32 | local subnet="${1}" | |
cda384a2 | 33 | local action="${2}" |
80fbd899 MT |
34 | |
35 | # Don't block a wildcard subnet | |
36 | if [ "${subnet}" = "0.0.0.0/0" ] || [ "${subnet}" = "0.0.0.0/0.0.0.0" ]; then | |
37 | return 0 | |
38 | fi | |
39 | ||
cda384a2 MT |
40 | case "${action}" in |
41 | reject) | |
42 | iptables -A IPSECBLOCK -d "${subnet}" -j REJECT --reject-with icmp-net-unreachable | |
43 | ;; | |
44 | drop) | |
45 | iptables -A IPSECBLOCK -d "${subnet}" -j DROP | |
46 | ;; | |
47 | *) | |
48 | return 1 | |
49 | ;; | |
50 | esac | |
51 | ||
52 | return 0 | |
80fbd899 MT |
53 | } |
54 | ||
6c920b19 | 55 | install_policy() { |
80fbd899 MT |
56 | # Flush all exists rules |
57 | iptables -F IPSECBLOCK | |
58 | ||
cda384a2 | 59 | # Register local variables |
6c920b19 MT |
60 | local "${VARS[@]}" |
61 | local action | |
cda384a2 | 62 | |
6c920b19 | 63 | while IFS="," read -r "${VARS[@]}"; do |
80fbd899 MT |
64 | # Check if the connection is enabled |
65 | [ "${status}" = "on" ] || continue | |
66 | ||
67 | # Check if this a net-to-net connection | |
68 | [ "${type}" = "net" ] || continue | |
69 | ||
70 | # Split multiple subnets | |
71 | rightsubnets="${rightsubnets//\|/ }" | |
72 | ||
cda384a2 MT |
73 | case "${route}" in |
74 | route) | |
75 | action="drop" | |
76 | ;; | |
77 | *) | |
78 | action="reject" | |
79 | ;; | |
80 | esac | |
81 | ||
80fbd899 MT |
82 | local rightsubnet |
83 | for rightsubnet in ${rightsubnets}; do | |
cda384a2 | 84 | block_subnet "${rightsubnet}" "${action}" |
80fbd899 MT |
85 | done |
86 | done < "${VPN_CONFIG}" | |
87 | } | |
88 | ||
6c920b19 | 89 | install_policy || exit $? |