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

   1 ### -*-m4-*-
   2 ###
   3 ### Firewall configuration for vampire
   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 ### Network interfaces.
  26
  27 m4_divert(44)m4_dnl
  28 ## Interface definitions.
  29 if_untrusted=eth0.1
  30 if_trusted=eth0.0
  31 if_vpn=vpn-+
  32 if_iodine=dns+
  33 if_its_mz=eth0.0
  34 if_its_pi=eth0.0
  35
  36 m4_divert(-1)
  37 ###--------------------------------------------------------------------------
  38 ### vampire-specific rules.
  39
  40 m4_divert(35)m4_dnl
  41 errorchain ddos-evil-dns DROP
  42 ## Invalid DNS request with probably-forged sender address, with intent to
  43 ## cause DDOS.
  44
  45 m4_divert(82)m4_dnl
  46 ## Repelling evil DDos attack.
  47 run ipset -N ddos-evil-dns iphash 2>/dev/null || :
  48 run iptables -A inbound -g ddos-evil-dns \
  49         -m set --set ddos-evil-dns src \
  50         -p udp --destination-port $port_dns
  51
  52 ## Externally visible services.
  53 allowservices inbound tcp \
  54         finger ident \
  55         dns iodine \
  56         ssh \
  57         smtp \
  58         gnutella_svc \
  59         ftp ftp_data \
  60         rsync \
  61         disorder \
  62         http https \
  63         git
  64 allowservices inbound tcp \
  65         tor_public tor_directory
  66 allowservices inbound udp \
  67         dns iodine \
  68         tripe \
  69         gnutella_svc
  70
  71 ## Provide DNS resolution to local untrusted hosts.
  72 for p in tcp udp; do
  73   run iptables -A inbound -j ACCEPT \
  74           -s 172.29.198.0/24 \
  75           -p $p --destination-port $port_dns
  76 done
  77
  78 ## Provide syslog for evolution.
  79 run iptables -A inbound -j ACCEPT \
  80         -s 172.29.198.2 \
  81         -p udp --destination-port $port_syslog
  82
  83 ## Provide a web cache to local untrusted hosts.
  84 run iptables -A inbound -j ACCEPT \
  85         -s 172.29.198.0/24 \
  86         -p tcp --destination-port $port_squid
  87
  88 ## Watch outgoing Tor usage.
  89 run iptables -A OUTPUT -m multiport \
  90         -p tcp --source-ports $port_tor_public,$port_tor_directory
  91
  92 ## Other interesting things.
  93 dnsresolver inbound
  94 ntpclient inbound 158.152.1.76 158.152.1.204 194.159.253.2
  95
  96 m4_divert(-1)
  97 ###----- That's all, folks --------------------------------------------------