firewall: Allow blocking access to GREEN from GREEN.
[people/teissler/ipfire-2.x.git] / config / firewall / firewall-policy
CommitLineData
5d7faa45 1#!/bin/sh
dc21519f
AM
2###############################################################################
3# #
4# IPFire.org - A linux based firewall #
5bee9a9d 5# Copyright (C) 2013 Alexander Marx <amarx@ipfire.org> #
dc21519f
AM
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)
5d7faa45
AM
24eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
25
a211fee3
MT
26function iptables() {
27 /sbin/iptables --wait "$@"
28}
29
5d7faa45
AM
30iptables -F POLICYFWD
31iptables -F POLICYOUT
d47bb8a1 32iptables -F POLICYIN
53f4c74d
AM
33
34if [ -f "/var/ipfire/red/iface" ]; then
52c5ec83 35 IFACE="$(</var/ipfire/red/iface)"
53f4c74d 36fi
5d7faa45 37
52c5ec83
MT
38# Figure out what devices are configured.
39HAVE_BLUE="false"
40HAVE_ORANGE="false"
41
42case "${CONFIG_TYPE}" in
43 2)
bcf1a624 44 HAVE_ORANGE="true"
52c5ec83
MT
45 ;;
46 3)
bcf1a624 47 HAVE_BLUE="true"
52c5ec83
MT
48 ;;
49 4)
50 HAVE_BLUE="true"
51 HAVE_ORANGE="true"
52 ;;
53esac
54
d7050fc0 55HAVE_IPSEC="true"
2513ae73
MT
56HAVE_OPENVPN="true"
57
52c5ec83 58# INPUT
0e53d8a9 59
c0e0848f
MT
60# Allow access from GREEN
61iptables -A POLICYIN -i "${GREEN_DEV}" -j ACCEPT
62
d7050fc0
MT
63# IPsec INPUT
64case "${HAVE_IPSEC},${POLICY}" in
65 true,MODE1) ;;
66 true,*)
67 iptables -A POLICYIN -m policy --pol ipsec --dir in -j ACCEPT
68 ;;
69esac
70
0e53d8a9
MT
71# OpenVPN INPUT
72# Allow direct access to the internal IP addresses of the firewall
73# from remote subnets if forward policy is allowed.
74case "${HAVE_OPENVPN},${POLICY}" in
75 true,MODE1) ;;
76 true,*)
77 iptables -A POLICYIN -i tun+ -j ACCEPT
78 ;;
79esac
80
52c5ec83
MT
81case "${FWPOLICY2}" in
82 REJECT)
83 if [ "${DROPINPUT}" = "on" ]; then
824dc936 84 iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "REJECT_INPUT "
5d7faa45 85 fi
a211fee3 86 iptables -A POLICYIN -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_INPUT"
52c5ec83
MT
87 ;;
88 *) # DROP
89 if [ "${DROPINPUT}" = "on" ]; then
824dc936 90 iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
5d7faa45 91 fi
a211fee3 92 iptables -A POLICYIN -j DROP -m comment --comment "DROP_INPUT"
52c5ec83
MT
93 ;;
94esac
93b75f31 95
52c5ec83
MT
96# FORWARD
97case "${POLICY}" in
98 MODE1)
99 case "${FWPOLICY}" in
100 REJECT)
101 if [ "${DROPFORWARD}" = "on" ]; then
824dc936 102 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "REJECT_FORWARD "
52c5ec83 103 fi
a211fee3 104 iptables -A POLICYFWD -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_FORWARD"
52c5ec83
MT
105 ;;
106 *) # DROP
107 if [ "${DROPFORWARD}" = "on" ]; then
824dc936 108 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD "
52c5ec83 109 fi
a211fee3 110 iptables -A POLICYFWD -j DROP -m comment --comment "DROP_FORWARD"
52c5ec83
MT
111 ;;
112 esac
113 ;;
114
115 *)
c26a9ed2 116 # Access from GREEN is granted to everywhere
c926c637
AF
117 if [ "${IFACE}" = "${GREEN_DEV}" ]; then
118 # internet via green
119 # don't check source IP/NET if IFACE is GREEN
120 iptables -A POLICYFWD -i "${GREEN_DEV}" -j ACCEPT
121 else
122 iptables -A POLICYFWD -i "${GREEN_DEV}" -s "${GREEN_NETADDRESS}/${GREEN_NETMASK}" -j ACCEPT
123 fi
c26a9ed2
MT
124
125 # Grant access for IPsec VPN connections
126 iptables -A POLICYFWD -m policy --pol ipsec --dir in -j ACCEPT
127
128 # Grant access for OpenVPN connections
129 iptables -A POLICYFWD -i tun+ -j ACCEPT
130
52c5ec83
MT
131 if [ -n "${IFACE}" ]; then
132 if [ "${HAVE_BLUE}" = "true" ] && [ -n "${BLUE_DEV}" ]; then
c26a9ed2 133 iptables -A POLICYFWD -i "${BLUE_DEV}" -s "${BLUE_NETADDRESS}/${BLUE_NETMASK}" -o "${IFACE}" -j ACCEPT
52c5ec83 134 fi
8089b78d 135
c26a9ed2
MT
136 if [ "${HAVE_ORANGE}" = "true" ] && [ -n "${ORANGE_DEV}" ]; then
137 iptables -A POLICYFWD -i "${ORANGE_DEV}" -s "${ORANGE_NETADDRESS}/${ORANGE_NETMASK}" -o "${IFACE}" -j ACCEPT
8089b78d 138 fi
c26a9ed2 139 fi
8089b78d 140
c26a9ed2
MT
141 if [ "${DROPFORWARD}" = "on" ]; then
142 iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD "
5d7faa45 143 fi
a211fee3 144 iptables -A POLICYFWD -m comment --comment "DROP_FORWARD" -j DROP
52c5ec83
MT
145 ;;
146esac
147
148# OUTGOING
149case "${POLICY1}" in
150 MODE1)
151 case "${FWPOLICY1}" in
152 REJECT)
153 if [ "${DROPOUTGOING}" = "on" ]; then
824dc936 154 iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "REJECT_OUTPUT "
52c5ec83 155 fi
a211fee3 156 iptables -A POLICYOUT -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_OUTPUT"
52c5ec83
MT
157 ;;
158 *) # DROP
159 if [ "${DROPOUTGOING}" == "on" ]; then
824dc936 160 iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
52c5ec83 161 fi
a211fee3 162 iptables -A POLICYOUT -j DROP -m comment --comment "DROP_OUTPUT"
52c5ec83
MT
163 ;;
164 esac
165 ;;
166 *)
a211fee3
MT
167 iptables -A POLICYOUT -j ACCEPT
168 iptables -A POLICYOUT -m comment --comment "DROP_OUTPUT" -j DROP
52c5ec83
MT
169 ;;
170esac
aff15def
AM
171
172exit 0