Add IPv6 support to firewall tasks / template

Signed-off-by: Alan Orth <alan.orth@gmail.com>

roles/common/templates/ip6tables.j2

@@ -0,0 +1,22 @@
+*filter
+:INPUT ACCEPT [0:0]
+:FORWARD ACCEPT [0:0]
+:OUTPUT ACCEPT [0:0]
+-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT 
+-A INPUT -p ipv6-icmp -j ACCEPT
+-A INPUT -i lo -j ACCEPT
+
+-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -s ::/0  -j ACCEPT
+-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -s ::/0 -j ACCEPT
+
+{% if extra_iptables_rules is defined %}
+{% for rule in extra_iptables_rules %}
+{% if ghetto_ipsets[rule.acl].ipv6src is defined %}
+-A INPUT -p {{ rule.protocol }} -m state --state NEW -m {{ rule.protocol }} --dport {{ rule.port }} -s {{ ghetto_ipsets[rule.acl].ipv6src }} -j ACCEPT
+{% endif %}
+{% endfor %}
+{% endif %}
+
+-A INPUT -j REJECT --reject-with icmp6-adm-prohibited
+-A FORWARD -j REJECT --reject-with icmp6-adm-prohibited
+COMMIT