config/firewall/firewall-policy

   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 # INPUT
  56 case "${FWPOLICY2}" in
  57         REJECT)
  58                 if [ "${DROPINPUT}" = "on" ]; then
  59                         iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "REJECT_INPUT"
  60                 fi
  61                 iptables -A POLICYIN -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_INPUT"
  62                 ;;
  63         *) # DROP
  64                 if [ "${DROPINPUT}" = "on" ]; then
  65                         iptables -A POLICYIN -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT"
  66                 fi
  67                 iptables -A POLICYIN -j DROP -m comment --comment "DROP_INPUT"
  68                 ;;
  69 esac
  70
  71 # FORWARD
  72 case "${POLICY}" in
  73         MODE1)
  74                 case "${FWPOLICY}" in
  75                         REJECT)
  76                                 if [ "${DROPFORWARD}" = "on" ]; then
  77                                         iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "REJECT_FORWARD"
  78                                 fi
  79                                 iptables -A POLICYFWD -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_FORWARD"
  80                                 ;;
  81                         *) # DROP
  82                                 if [ "${DROPFORWARD}" = "on" ]; then
  83                                         iptables -A POLICYFWD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
  84                                 fi
  85                                 iptables -A POLICYFWD -j DROP -m comment --comment "DROP_FORWARD"
  86                                 ;;
  87                 esac
  88                 ;;
  89
  90         *)
  91                 if [ -n "${IFACE}" ]; then
  92                         if [ "${HAVE_BLUE}" = "true" ] && [ -n "${BLUE_DEV}" ]; then
  93                                 iptables -A POLICYFWD -i "${BLUE_DEV}" ! -o "${IFACE}" -j DROP
  94                         fi
  95                         if [ "${HAVE_ORANGE}" = "true" ] && [ -n "${ORANGE_DEV}" ]; then
  96                                 iptables -A POLICYFWD -i "${ORANGE_DEV}" ! -o "${IFACE}" -j DROP
  97                         fi
  98                 fi
  99                 iptables -A POLICYFWD -j ACCEPT
 100                 iptables -A POLICYFWD -m comment --comment "DROP_FORWARD" -j DROP
 101                 ;;
 102 esac
 103
 104 # OUTGOING
 105 case "${POLICY1}" in
 106         MODE1)
 107                 case "${FWPOLICY1}" in
 108                         REJECT)
 109                                 if [ "${DROPOUTGOING}" = "on" ]; then
 110                                         iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "REJECT_OUTPUT"
 111                                 fi
 112                                 iptables -A POLICYOUT -j REJECT --reject-with icmp-host-unreachable -m comment --comment "DROP_OUTPUT"
 113                                 ;;
 114                         *) # DROP
 115                                 if [ "${DROPOUTGOING}" == "on" ]; then
 116                                         iptables -A POLICYOUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT"
 117                                 fi
 118                                 iptables -A POLICYOUT -j DROP -m comment --comment "DROP_OUTPUT"
 119                                 ;;
 120                 esac
 121                 ;;
 122         *)
 123                 iptables -A POLICYOUT -j ACCEPT
 124                 iptables -A POLICYOUT -m comment --comment "DROP_OUTPUT" -j DROP
 125                 ;;
 126 esac
 127
 128 exit 0