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 ### jem-specific rules.
  36
  37 m4_divert(84)m4_dnl
  38 ## Set up the SAUCE sinbin.  Unfortunately, ipset is a bit brittle.  This
  39 ## isn't a completely critical part of the firewall security, so don't make
  40 ## this fail the entire script.
  41 errorchain sauce REJECT
  42 makeset sauce iphash || :
  43 iptables -A inbound -g sauce -m set --match-set sauce src || :
  44
  45 ## Externally visible services.
  46 allowservices inbound tcp \
  47         ssh \
  48         ident \
  49         smtp submission \
  50         http https \
  51         imaps
  52
  53 ## Provide DNS resolution to local untrusted hosts.
  54 for p in tcp udp; do
  55   run iptables -A inbound -j ACCEPT \
  56           -s 172.29.198.0/24 \
  57           -p $p --destination-port $port_dns
  58 done
  59
  60 m4_divert(-1)
  61 ###----- That's all, folks --------------------------------------------------