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class site_config::initial_firewall {
# This class is intended to setup an initial firewall, before shorewall is
# configured. The purpose of this is for the rare case where shorewall fails
# to start, we should not expose services to the public.
$ssh_config = hiera('ssh')
$ssh_port = $ssh_config['port']
package { 'iptables':
ensure => present
}
file {
# This firewall enables ssh access, dns lookups and web lookups (for
# package installation) but otherwise restricts all outgoing and incoming
# ports
'/etc/network/ipv4firewall_up.rules':
content => template('site_config/ipv4firewall_up.rules.erb'),
owner => root,
group => 0,
mode => '0644';
# This firewall denys all ipv6 traffic - we will need to change this
# when we begin to support ipv6
'/etc/network/ipv6firewall_up.rules':
content => template('site_config/ipv6firewall_up.rules.erb'),
owner => root,
group => 0,
mode => '0644';
# Run the iptables-restore in if-pre-up so that the network is locked down
# until the correct interfaces and ips are connected
'/etc/network/if-pre-up.d/ipv4tables':
content => "#!/bin/sh\n/sbin/iptables-restore < /etc/network/ipv4firewall_up.rules\n",
owner => root,
group => 0,
mode => '0744';
# Same as above for IPv6
'/etc/network/if-pre-up.d/ipv6tables':
content => "#!/bin/sh\n/sbin/ip6tables-restore < /etc/network/ipv6firewall_up.rules\n",
owner => root,
group => 0,
mode => '0744';
}
# Immediately setup these firewall rules, but only if shorewall is not running
exec {
'default_ipv4_firewall':
command => '/sbin/iptables-restore < /etc/network/ipv4firewall_up.rules',
logoutput => true,
unless => 'test -x /etc/init.d/shorewall && /etc/init.d/shorewall status',
require => File['/etc/network/ipv4firewall_up.rules'];
'default_ipv6_firewall':
command => '/sbin/ip6tables-restore < /etc/network/ipv6firewall_up.rules',
logoutput => true,
unless => 'test -x /etc/init.d/shorewall && /etc/init.d/shorewall status',
require => File['/etc/network/ipv6firewall_up.rules'];
}
}
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