diff options
Diffstat (limited to 'puppet/modules/site_config')
3 files changed, 89 insertions, 0 deletions
diff --git a/puppet/modules/site_config/manifests/firewall.pp b/puppet/modules/site_config/manifests/firewall.pp new file mode 100644 index 00000000..b9fc5ffe --- /dev/null +++ b/puppet/modules/site_config/manifests/firewall.pp @@ -0,0 +1,62 @@ +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 => '/sbin/shorewall status', + require => File['/etc/network/ipv4firewall_up.rules']; + + 'default_ipv6_firewall': + command => '/sbin/ip6tables-restore < /etc/network/ipv6firewall_up.rules', + logoutput => true, + unless => '/sbin/shorewall status', + require => File['/etc/network/ipv6firewall_up.rules']; + } +} diff --git a/puppet/modules/site_config/templates/ipv4firewall_up.rules.erb b/puppet/modules/site_config/templates/ipv4firewall_up.rules.erb new file mode 100644 index 00000000..c03716f3 --- /dev/null +++ b/puppet/modules/site_config/templates/ipv4firewall_up.rules.erb @@ -0,0 +1,20 @@ +# Generated by iptables-save v1.4.14 on Tue Aug 20 14:40:40 2013 +*filter +:INPUT DROP [0:0] +:FORWARD DROP [0:0] +:OUTPUT DROP [0:0] +-A INPUT -i lo -j ACCEPT +-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT +-A INPUT -p tcp -m state --state NEW,ESTABLISHED --dport <%= @ssh_port %> -j ACCEPT +-A INPUT -p udp -m udp --sport 53 -j ACCEPT +-A INPUT -p icmp -m icmp --icmp-type 8 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT +-A INPUT -p icmp -m icmp --icmp-type 0 -m state --state RELATED,ESTABLISHED -j ACCEPT +-A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 +-A OUTPUT -p icmp -m icmp --icmp-type 0 -m state --state RELATED,ESTABLISHED -j ACCEPT +-A OUTPUT -p icmp -m icmp --icmp-type 8 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT +-A OUTPUT -p tcp -m state --state NEW,ESTABLISHED --sport <%= @ssh_port %> -j ACCEPT +-A OUTPUT -p tcp -m state --state NEW,ESTABLISHED --dport 80 -j ACCEPT +-A OUTPUT -p udp -m udp --dport 53 -j ACCEPT +-A OUTPUT -p udp -m udp --dport 123 -j ACCEPT +-A OUTPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 +COMMIT diff --git a/puppet/modules/site_config/templates/ipv6firewall_up.rules.erb b/puppet/modules/site_config/templates/ipv6firewall_up.rules.erb new file mode 100644 index 00000000..e7fae52e --- /dev/null +++ b/puppet/modules/site_config/templates/ipv6firewall_up.rules.erb @@ -0,0 +1,7 @@ +# Generated by ip6tables-save v1.4.20 on Tue Aug 20 12:19:43 2013 +*filter +:INPUT DROP [24:1980] +:FORWARD DROP [0:0] +:OUTPUT DROP [14:8030] +COMMIT +# Completed on Tue Aug 20 12:19:43 2013 |