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+modules/shorewall/manifests/init.pp - manage firewalling with shorewall 3.x
+
+Puppet Module for Shorewall
+---------------------------
+This module manages the configuration of Shorewall (http://www.shorewall.net/)
+
+Requirements
+------------
+
+This module requires the augeas module, you can find that here:
+https://labs.riseup.net/code/projects/shared-augeas
+
+Copyright
+---------
+
+Copyright (C) 2007 David Schmitt <david@schmitt.edv-bus.at>
+adapted by immerda project group - admin+puppet(at)immerda.ch
+adapted by Puzzle ITC - haerry+puppet(at)puzzle.ch
+Copyright (c) 2009 Riseup Networks - micah(shift+2)riseup.net
+Copyright (c) 2010 intrigeri - intrigeri(at)boum.org
+See LICENSE for the full license granted to you.
+
+Based on the work of ADNET Ghislain <gadnet@aqueos.com> from AQUEOS
+at https://reductivelabs.com/trac/puppet/wiki/AqueosShorewall
+
+Merged from:
+- git://git.puppet.immerda.ch/module-shorewall.git
+- git://labs.riseup.net/module_shorewall
+
+Todo
+----
+- check if shorewall compiles without errors, otherwise fail !
+
+Configuration
+-------------
+
+If you need to install a specific version of shorewall other than
+the default one that would be installed by 'ensure => present', then
+you can set the following variable and that specific version will be
+installed instead:
+
+    $shorewall_ensure_version = "4.0.15-1"
+
+The main shorewall.conf is not managed by this module, rather the default one
+that your operatingsystem provides is used, and any modifications you wish to do
+to it should be configured with augeas, for example, to set IP_FORWARDING=Yes in
+shorewall.conf, simply do this:
+
+  augeas { 'enable_ip_forwarding':
+    changes => 'set /files/etc/shorewall/shorewall.conf/IP_FORWARDING Yes',
+    lens    => 'Shellvars.lns',
+    incl    => '/etc/shorewall/shorewall.conf',
+    notify  => Service[shorewall];
+  }
+
+NOTE: this requires the augeas ruby bindings newer than 0.7.3. 
+
+If you need to, you can provide an entire shorewall.conf by passing its
+source to the main class:
+
+class{'shorewall':
+  conf_source => "puppet:///modules/site_shorewall/${::fqdn}/shorewall.conf.${::operatingsystem}",
+}
+
+NOTE: if you distribute a file, you cannot also use augeas, puppet and augeas
+will fight forever. Secondly, you will *need* to make sure that if you are shipping your own
+shorewall.conf that you have the following value set in your shorewall.conf otherwise this
+module will not work:
+
+    CONFIG_PATH="/etc/shorewall/puppet:/etc/shorewall:/usr/share/shorewall"
+
+Documentation
+-------------
+
+see also: http://reductivelabs.com/trac/puppet/wiki/Recipes/AqueosShorewall
+
+Torify
+------
+
+The shorewall::rules::torify define can be used to force some outgoing
+TCP traffic through the Tor transparent proxy. The corresponding
+non-TCP traffic is rejected accordingly.
+
+Beware! This define only is part of a torified setup. DNS requests and
+IPv6, amongst others, might leak network activity you would prefer not
+to. You really need to read proper documentation about these matters
+before using this feature e.g.:
+
+  https://www.torproject.org/download/download.html.en#warning
+
+The Tor transparent proxy location defaults to 127.0.0.1:9040 and can
+be configured by setting the $tor_transparent_proxy_host and
+$tor_transparent_proxy_port variables before including the main
+shorewall class.
+
+Example usage follows.
+
+Torify any outgoing TCP traffic originating from user bob or alice and
+aimed at 6.6.6.6 or 7.7.7.7:
+
+  shorewall::rules::torify {
+    'torify-some-bits':
+      users        => [ 'bob', 'alice' ],
+      destinations => [ '6.6.6.6', '7.7.7.7' ];
+  }
+
+Torify any outgoing TCP traffic to 8.8.8.8:
+
+  shorewall::rules::torify {
+    'torify-to-this-host':
+      destinations  => [ '8.8.8.8' ];
+  }
+
+When no destination nor user is provided any outgoing TCP traffic (see
+restrictions bellow) is torified. In that case the user running the
+Tor client ($tor_user) is whitelisted; this variable defaults to
+"debian-tor" on Debian systems and to "tor" on others. if this does
+not suit your configuration you need to set the $tor_user variable
+before including the main shorewall class.
+
+When no destination is provided traffic directed to RFC1918 addresses
+is by default allowed and (obviously) not torified. This behaviour can
+be changed by setting the allow_rfc1918 parameter to false.
+
+Torify any outgoing TCP traffic but connections to RFC1918 addresses:
+
+  shorewall::rules::torify {
+    'torify-everything-but-lan':
+  }
+
+Torify any outgoing TCP traffic:
+
+  shorewall::rules::torify {
+    'torify-everything:
+      allow_rfc1918 => false;
+  }
+
+In some cases (e.g. when providing no specific destination nor user
+and denying access to RFC1918 addresses) UDP DNS requests may be
+rejected. This is intentional: it does not make sense leaking -via DNS
+requests- network activity that would otherwise be torified. In that
+case you probably want to read proper documentation about such
+matters, enable the Tor DNS resolver and redirect DNS requests through
+it.
+
+Example
+-------
+
+Example from node.pp:
+
+node xy {
+	class{'config::site_shorewall':
+	  startup => "0"  # create shorewall ruleset but don't startup
+  }
+	shorewall::rule {
+		'incoming-ssh': source => 'all', destination => '$FW',  action  => 'SSH(ACCEPT)', order => 200;
+		'incoming-puppetmaster': source => 'all', destination => '$FW',  action  => 'Puppetmaster(ACCEPT)', order => 300;
+		'incoming-imap': source => 'all', destination => '$FW',  action  => 'IMAP(ACCEPT)', order => 300;
+		'incoming-smtp': source => 'all', destination => '$FW',  action  => 'SMTP(ACCEPT)', order => 300;
+	}
+}
+
+
+class config::site_shorewall($startup = '1') {
+  class{'shorewall':
+    startup => $startup
+  }
+
+  # If you want logging:
+  #shorewall::params {
+  # 'LOG':  value => 'debug';
+  #}
+
+  shorewall::zone {'net':
+    type => 'ipv4';
+  }
+
+  shorewall::rule_section { 'NEW':
+    order => 100;
+  }
+
+  shorewall::interface { 'eth0':
+    zone    => 'net',
+    rfc1918  => true,
+    options => 'tcpflags,blacklist,nosmurfs';
+  }
+
+  shorewall::policy {
+    'fw-to-fw':
+      sourcezone              =>      '$FW',
+      destinationzone         =>      '$FW',
+      policy                  =>      'ACCEPT',
+      order                   =>      100;
+    'fw-to-net':
+      sourcezone              =>      '$FW',
+      destinationzone         =>      'net',
+      policy                  =>      'ACCEPT',
+      shloglevel              =>      '$LOG',
+      order                   =>      110;
+    'net-to-fw':
+      sourcezone              =>      'net',
+      destinationzone         =>      '$FW',
+      policy                  =>      'DROP',
+      shloglevel              =>      '$LOG',
+      order                   =>      120;
+  }       
+
+        
+  # default Rules : ICMP 
+  shorewall::rule {
+    'allicmp-to-host':
+      source => 'all',
+      destination => '$FW',
+      order  => 200,
+      action  => 'AllowICMPs/(ACCEPT)';
+  }
+}
+
+