add ip6tables

Somebody who uses ipv6 should tell me if this actually works.

roles/iptables/handlers/main.yml

@@ -1,3 +1,6 @@
 ---
 - name: restart iptables
   service: name=iptables.service state=restarted
+
+- name: restart ip6tables
+  service: name=ip6tables.service state=restarted

roles/iptables/tasks/main.yml

@@ -1,8 +1,16 @@
 ---
-- name: Push firewall config
+- name: Push ipv4 firewall config
   template: src=iptables.rules.j2 dest=/etc/iptables/iptables.rules
   notify:
     - restart iptables
 
 - name: Enable and start iptables
   service: name=iptables.service enabled=yes state=started
+
+- name: Push ipv6 firewall config
+  template: src=ip6tables.rules.j2 dest=/etc/iptables/ip6tables.rules
+  notify:
+    - restart ip6tables
+
+- name: Enable and start ip6tables
+  service: name=ip6tables.service enabled=yes state=started

roles/iptables/templates/ip6tables.rules.j2

@@ -0,0 +1,27 @@
+# {{ ansible_managed }}
+*raw
+:PREROUTING ACCEPT [0:0]
+:OUTPUT ACCEPT [0:0]
+-A PREROUTING -m rpfilter -j ACCEPT
+-A PREROUTING -j DROP
+COMMIT
+*filter
+:INPUT DROP [0:0]
+:FORWARD DROP [0:0]
+:OUTPUT ACCEPT [0:0]
+:TCP - [0:0]
+:UDP - [0:0]
+-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+-A INPUT -i lo -j ACCEPT
+-A INPUT -m conntrack --ctstate INVALID -j DROP
+-A INPUT -s fe80::/10 -p ipv6-icmp -j ACCEPT
+-A INPUT -p ipv6-icmp --icmpv6-type 128 -m conntrack --ctstate NEW -j ACCEPT
+-A INPUT -p udp -m conntrack --ctstate NEW -j UDP
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m conntrack --ctstate NEW -j TCP
+-A INPUT -p udp -j REJECT --reject-with icmp6-adm-prohibited
+-A INPUT -p tcp -j REJECT --reject-with tcp-reset
+-A INPUT -j REJECT --reject-with icmp6-adm-prohibited
+{% if ssh.enable_sshd %}
+-A TCP -p tcp -m tcp --dport {{ ssh.port }} -j ACCEPT
+{% endif %}
+COMMIT