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1 #!/bin/sh
2 ###############################################################################
3 # #
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2013 Alexander Marx <amarx@ipfire.org> #
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 eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
23 eval $(/usr/local/bin/readhash /var/ipfire/firewall/settings)
24 eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
25
26 function iptables() {
27 /sbin/iptables --wait "$@"
28 }
29
30 iptables -F POLICYFWD
31 iptables -F POLICYOUT
32 iptables -F POLICYIN
33
34 if [ -f "/var/ipfire/red/iface" ]; then
35 IFACE="$(</var/ipfire/red/iface)"
36 fi
37
38 # Figure out what devices are configured.
39 HAVE_BLUE="false"
40 HAVE_ORANGE="false"
41
42 case "${CONFIG_TYPE}" in
43 2)
44 HAVE_ORANGE="true"
45 ;;
46 3)
47 HAVE_BLUE="true"
48 ;;
49 4)
50 HAVE_BLUE="true"
51 HAVE_ORANGE="true"
52 ;;
53 esac
54
55 HAVE_OPENVPN="true"
56
57 # INPUT
58 case "${FWPOLICY2}" in
59 REJECT)
60 if [ "${DROPINPUT}" = "on" ]; then
61 iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "REJECT_INPUT"
62 fi
63 iptables -A POLICYIN -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_INPUT"
64 ;;
65 *) # DROP
66 # OpenVPN
67 # Allow direct access to the internal IP addresses of the firewall
68 # from remote subnets if forward policy is allowed.
69 case "${HAVE_OPENVPN},${POLICY}" in
70 true,MODE1) ;;
71 true,*)
72 iptables -A POLICYIN -i tun+ -j ACCEPT
73 ;;
74 esac
75
76 if [ "${DROPINPUT}" = "on" ]; then
77 iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT"
78 fi
79 iptables -A POLICYIN -j DROP -m comment --comment "DROP_INPUT"
80 ;;
81 esac
82
83 # FORWARD
84 case "${POLICY}" in
85 MODE1)
86 case "${FWPOLICY}" in
87 REJECT)
88 if [ "${DROPFORWARD}" = "on" ]; then
89 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "REJECT_FORWARD"
90 fi
91 iptables -A POLICYFWD -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_FORWARD"
92 ;;
93 *) # DROP
94 if [ "${DROPFORWARD}" = "on" ]; then
95 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
96 fi
97 iptables -A POLICYFWD -j DROP -m comment --comment "DROP_FORWARD"
98 ;;
99 esac
100 ;;
101
102 *)
103 if [ -n "${IFACE}" ]; then
104 if [ "${HAVE_BLUE}" = "true" ] && [ -n "${BLUE_DEV}" ]; then
105 iptables -A POLICYFWD -i "${BLUE_DEV}" ! -o "${IFACE}" -j DROP
106 fi
107 if [ "${HAVE_ORANGE}" = "true" ] && [ -n "${ORANGE_DEV}" ]; then
108 iptables -A POLICYFWD -i "${ORANGE_DEV}" ! -o "${IFACE}" -j DROP
109 fi
110 fi
111 iptables -A POLICYFWD -j ACCEPT
112 iptables -A POLICYFWD -m comment --comment "DROP_FORWARD" -j DROP
113 ;;
114 esac
115
116 # OUTGOING
117 case "${POLICY1}" in
118 MODE1)
119 case "${FWPOLICY1}" in
120 REJECT)
121 if [ "${DROPOUTGOING}" = "on" ]; then
122 iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "REJECT_OUTPUT"
123 fi
124 iptables -A POLICYOUT -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_OUTPUT"
125 ;;
126 *) # DROP
127 if [ "${DROPOUTGOING}" == "on" ]; then
128 iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT"
129 fi
130 iptables -A POLICYOUT -j DROP -m comment --comment "DROP_OUTPUT"
131 ;;
132 esac
133 ;;
134 *)
135 iptables -A POLICYOUT -j ACCEPT
136 iptables -A POLICYOUT -m comment --comment "DROP_OUTPUT" -j DROP
137 ;;
138 esac
139
140 exit 0