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

   1 ### -*-sh-*-
   2 ###
   3 ### Firewall configuration for fender actual
   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 ### fender-specific rules.
  26
  27 m4_divert(86)m4_dnl
  28 ## Externally visible services.
  29 allowservices inbound tcp \
  30         ssh \
  31         ident
  32
  33 ## We have to provide NTP service.  The guests sync to our clock.
  34 ntpclient inbound $ntp_servers
  35
  36 ## Guaranteed black hole.  Put this at the very front of the chain.
  37 run iptables -I INPUT -d 212.13.198.78 -j DROP
  38 run ip6tables -I INPUT -d 2001:ba8:0:1d9::ffff -j DROP
  39
  40 ## Ethernet bridge-level filtering for source addresses.
  41 run ebtables -F
  42 for c in bad-source-addr check-eth0; do
  43   run ebtables -X $c >/dev/null 2>&1 || :
  44 done
  45 for i in log limit ip ip6; do run modprobe ebt-$i; done
  46 run ebtables -N bad-source-addr
  47 run ebtables -A bad-source-addr \
  48         --limit 20/second --limit-burst 100 \
  49         --log-prefix "fw: bad-source-addr(br) " --log-ip --log-ip6
  50 run ebtables -A bad-source-addr -j DROP
  51 run ebtables -N check-eth0
  52 run ebtables -A check-eth0 -j RETURN -p ip --ip-source ! 212.13.198.64/28
  53 run ebtables -A check-eth0 -j RETURN -p ip6 --ip6-source 2001:ba8:0:1d9::1
  54 run ebtables -A check-eth0 -j bad-source-addr \
  55         -p ip6 --ip6-source 2001:ba8:1d9::/48
  56 run ebtables -A check-eth0 -j bad-source-addr \
  57         -p ip6 --ip6-source 2001:ba8:0:1d9::/64
  58 run ebtables -A check-eth0 -j RETURN -p ip6
  59 run ebtables -A check-eth0 -j RETURN -p ip --ip-source 212.13.198.64/30
  60 run ebtables -A check-eth0 -j RETURN -p ip --ip-source 212.13.198.68
  61 run ebtables -A check-eth0 -j bad-source-addr -p ip
  62 run ebtables -A INPUT -j check-eth0 -i bond0
  63 run ebtables -A FORWARD -j check-eth0 -i bond0
  64
  65 m4_divert(-1)
  66 ###----- That's all, folks --------------------------------------------------