mdw@git.distorted.org.uk Git - firewall/blob - jem.m4

   1 ### -*-sh-*-
   2 ###
   3 ### Firewall configuration for jem
   4 ###
   5 ### (c) 2008 Mark Wooding
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This program is free software; you can redistribute it and/or modify
  11 ### it under the terms of the GNU General Public License as published by
  12 ### the Free Software Foundation; either version 2 of the License, or
  13 ### (at your option) any later version.
  14 ###
  15 ### This program is distributed in the hope that it will be useful,
  16 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ### GNU General Public License for more details.
  19 ###
  20 ### You should have received a copy of the GNU General Public License
  21 ### along with this program; if not, write to the Free Software Foundation,
  22 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23
  24 ###--------------------------------------------------------------------------
  25 ### Config settings.
  26
  27 ## This host isn't a router.
  28 setconf(forward, 0)
  29
  30 ## This host is involved in a routing asymmetry.
  31 setconf(rp_filter, 0)
  32 setconf(log_martians, 0)
  33
  34 ###--------------------------------------------------------------------------
  35 ### Network interfaces.
  36
  37 m4_divert(44)m4_dnl
  38 ## Interface definitions.
  39 if_dmz=eth0
  40 if_trusted=eth1
  41 if_safe=$if_dmz,$if_trusted
  42 if_untrusted=$if_dmz,$if_trusted
  43 if_vpn=$if_dmz,$if_trusted
  44 if_iodine=$if_dmz,$if_trusted
  45 if_its_mz=$if_dmz,$if_trusted
  46 if_its_pi=$if_dmz,$if_trusted
  47
  48 m4_divert(-1)
  49 ###--------------------------------------------------------------------------
  50 ### jem-specific rules.
  51
  52 m4_divert(82)m4_dnl
  53 ## Set up the SAUCE sinbin.  Unfortunately, ipset is a bit brittle.  This
  54 ## isn't a completely critical part of the firewall security, so don't make
  55 ## this fail the entire script.
  56 errorchain sauce REJECT
  57 makeset sauce iphash || :
  58 iptables -A inbound -g sauce -m set --match-set sauce src || :
  59
  60 ## Externally visible services.
  61 allowservices inbound tcp \
  62         ssh \
  63         ident \
  64         smtp submission \
  65         http https \
  66         imaps
  67
  68 ## Provide DNS resolution to local untrusted hosts.
  69 for p in tcp udp; do
  70   run iptables -A inbound -j ACCEPT \
  71           -s 172.29.198.0/24 \
  72           -p $p --destination-port $port_dns
  73 done
  74
  75 m4_divert(-1)
  76 ###----- That's all, folks --------------------------------------------------