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

   1 ### -*-sh-*-
   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 ### Config settings.
  26
  27 ## This router is involved in a routing asymmetry.
  28 setconf(rp_filter, 0)
  29 setconf(log_martians, 0)
  30
  31 ###--------------------------------------------------------------------------
  32 ### Network interfaces.
  33
  34 m4_divert(44)m4_dnl
  35 ## Interface definitions.
  36 if_dmz=eth0.0
  37 if_trusted=eth0.1
  38 if_safe=$if_dmz,$if_trusted
  39 if_untrusted=eth0.3
  40 if_vpn=vpn-+
  41 if_iodine=dns+
  42 if_its_mz=$if_dmz,$if_trusted
  43 if_its_pi=$if_dmz,$if_trusted
  44
  45 m4_divert(-1)
  46 ###--------------------------------------------------------------------------
  47 ### vampire-specific rules.
  48
  49 m4_divert(82)m4_dnl
  50 ## Externally visible services.
  51 allowservices inbound tcp \
  52         finger ident \
  53         dns iodine \
  54         ssh \
  55         smtp submission \
  56         rdesktop \
  57         gnutella_svc \
  58         ftp ftp_data \
  59         rsync \
  60         imaps \
  61         disorder mpd \
  62         http https squid \
  63         git \
  64         tor_public tor_directory i2p
  65 allowservices inbound udp \
  66         dns iodine \
  67         tripe \
  68         gnutella_svc \
  69         i2p
  70
  71 ## Extend some services to local untrusted hosts.
  72 clearchain inbound-untrusted
  73 run iptables -A inbound -j inbound-untrusted \
  74         -s 172.29.198.0/24
  75
  76 allowservices inbound-untrusted tcp \
  77         dns \
  78         netbios_ssn microsoft_ds
  79 allowservices inbound-untrusted udp \
  80         dns \
  81         tftp
  82
  83 ## Provide syslog for evolution.
  84 run iptables -A inbound -j ACCEPT \
  85         -s 172.29.198.2 \
  86         -p udp --destination-port $port_syslog
  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 $ntp_servers
  95
  96 ## NAT for RFC1918 addresses.
  97 for i in PREROUTING OUTPUT POSTROUTING; do
  98   run iptables -t nat -P $i ACCEPT 2>/dev/null || :
  99   run iptables -t nat -F $i 2>/dev/null || :
 100 done
 101 run iptables -t nat -F
 102 run iptables -t nat -X
 103
 104 run iptables -t nat -N outbound
 105 run iptables -t nat -A outbound -j RETURN ! -o $if_dmz
 106 run iptables -t nat -A outbound -j RETURN ! -s 172.29.198.0/23
 107 run iptables -t nat -A outbound -j RETURN -d 62.49.204.144/28
 108 run iptables -t nat -A outbound -j RETURN -d 172.29.198.0/23
 109 run iptables -t nat -A outbound -j SNAT --to-source 62.49.204.158
 110 run iptables -t nat -A POSTROUTING -j outbound
 111
 112 ## Set up NAT protocol helpers.  In particular, SIP needs some special
 113 ## twiddling.
 114 run modprobe nf_conntrack_sip \
 115   ports=5060 \
 116   sip_direct_signalling=0 \
 117   sip_direct_media=0
 118 for p in ftp sip h323; do
 119   run modprobe nf_nat_$p
 120 done
 121
 122 m4_divert(-1)
 123 ###----- That's all, folks --------------------------------------------------