firewall-policy: Clarify policy rules.
[people/teissler/ipfire-2.x.git] / config / firewall / firewall-policy
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5d7faa45 1#!/bin/sh
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2###############################################################################
3# #
4# IPFire.org - A linux based firewall #
5bee9a9d 5# Copyright (C) 2013 Alexander Marx <amarx@ipfire.org> #
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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###############################################################################
dc21519f 21
52c5ec83 22eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
6d8eb5de 23eval $(/usr/local/bin/readhash /var/ipfire/firewall/settings)
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24eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
25
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26function iptables() {
27 /sbin/iptables --wait "$@"
28}
29
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30iptables -F POLICYFWD
31iptables -F POLICYOUT
d47bb8a1 32iptables -F POLICYIN
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33
34if [ -f "/var/ipfire/red/iface" ]; then
52c5ec83 35 IFACE="$(</var/ipfire/red/iface)"
53f4c74d 36fi
5d7faa45 37
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38# Figure out what devices are configured.
39HAVE_BLUE="false"
40HAVE_ORANGE="false"
41
42case "${CONFIG_TYPE}" in
43 2)
bcf1a624 44 HAVE_ORANGE="true"
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45 ;;
46 3)
bcf1a624 47 HAVE_BLUE="true"
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48 ;;
49 4)
50 HAVE_BLUE="true"
51 HAVE_ORANGE="true"
52 ;;
53esac
54
d7050fc0 55HAVE_IPSEC="true"
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56HAVE_OPENVPN="true"
57
52c5ec83 58# INPUT
0e53d8a9 59
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60# IPsec INPUT
61case "${HAVE_IPSEC},${POLICY}" in
62 true,MODE1) ;;
63 true,*)
64 iptables -A POLICYIN -m policy --pol ipsec --dir in -j ACCEPT
65 ;;
66esac
67
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68# OpenVPN INPUT
69# Allow direct access to the internal IP addresses of the firewall
70# from remote subnets if forward policy is allowed.
71case "${HAVE_OPENVPN},${POLICY}" in
72 true,MODE1) ;;
73 true,*)
74 iptables -A POLICYIN -i tun+ -j ACCEPT
75 ;;
76esac
77
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78case "${FWPOLICY2}" in
79 REJECT)
80 if [ "${DROPINPUT}" = "on" ]; then
824dc936 81 iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "REJECT_INPUT "
5d7faa45 82 fi
a211fee3 83 iptables -A POLICYIN -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_INPUT"
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84 ;;
85 *) # DROP
86 if [ "${DROPINPUT}" = "on" ]; then
824dc936 87 iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
5d7faa45 88 fi
a211fee3 89 iptables -A POLICYIN -j DROP -m comment --comment "DROP_INPUT"
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90 ;;
91esac
93b75f31 92
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93# FORWARD
94case "${POLICY}" in
95 MODE1)
96 case "${FWPOLICY}" in
97 REJECT)
98 if [ "${DROPFORWARD}" = "on" ]; then
824dc936 99 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "REJECT_FORWARD "
52c5ec83 100 fi
a211fee3 101 iptables -A POLICYFWD -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_FORWARD"
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102 ;;
103 *) # DROP
104 if [ "${DROPFORWARD}" = "on" ]; then
824dc936 105 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD "
52c5ec83 106 fi
a211fee3 107 iptables -A POLICYFWD -j DROP -m comment --comment "DROP_FORWARD"
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108 ;;
109 esac
110 ;;
111
112 *)
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113 # Access from GREEN is granted to everywhere
114 iptables -A POLICYFWD -i "${GREEN_DEV}" -s "${GREEN_NETADDRESS}/${GREEN_NETMASK}" -j ACCEPT
115
116 # Grant access for IPsec VPN connections
117 iptables -A POLICYFWD -m policy --pol ipsec --dir in -j ACCEPT
118
119 # Grant access for OpenVPN connections
120 iptables -A POLICYFWD -i tun+ -j ACCEPT
121
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122 if [ -n "${IFACE}" ]; then
123 if [ "${HAVE_BLUE}" = "true" ] && [ -n "${BLUE_DEV}" ]; then
c26a9ed2 124 iptables -A POLICYFWD -i "${BLUE_DEV}" -s "${BLUE_NETADDRESS}/${BLUE_NETMASK}" -o "${IFACE}" -j ACCEPT
52c5ec83 125 fi
8089b78d 126
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127 if [ "${HAVE_ORANGE}" = "true" ] && [ -n "${ORANGE_DEV}" ]; then
128 iptables -A POLICYFWD -i "${ORANGE_DEV}" -s "${ORANGE_NETADDRESS}/${ORANGE_NETMASK}" -o "${IFACE}" -j ACCEPT
8089b78d 129 fi
c26a9ed2 130 fi
8089b78d 131
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132 if [ "${DROPFORWARD}" = "on" ]; then
133 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD "
5d7faa45 134 fi
a211fee3 135 iptables -A POLICYFWD -m comment --comment "DROP_FORWARD" -j DROP
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136 ;;
137esac
138
139# OUTGOING
140case "${POLICY1}" in
141 MODE1)
142 case "${FWPOLICY1}" in
143 REJECT)
144 if [ "${DROPOUTGOING}" = "on" ]; then
824dc936 145 iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "REJECT_OUTPUT "
52c5ec83 146 fi
a211fee3 147 iptables -A POLICYOUT -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_OUTPUT"
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148 ;;
149 *) # DROP
150 if [ "${DROPOUTGOING}" == "on" ]; then
824dc936 151 iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
52c5ec83 152 fi
a211fee3 153 iptables -A POLICYOUT -j DROP -m comment --comment "DROP_OUTPUT"
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154 ;;
155 esac
156 ;;
157 *)
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158 iptables -A POLICYOUT -j ACCEPT
159 iptables -A POLICYOUT -m comment --comment "DROP_OUTPUT" -j DROP
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160 ;;
161esac
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162
163exit 0