Initial support for ipv6 firewall in linux iptables.

firewall/templates/ip6tables.erb

@@ -0,0 +1,26 @@
+<% require 'ipaddr' -%>
+*filter
+:INPUT ACCEPT [0:0]
+:FORWARD ACCEPT [0:0]
+:OUTPUT ACCEPT [0:0]
+-A INPUT -i lo -j ACCEPT
+-A INPUT -m ipv6header --header ah -j ACCEPT
+-A INPUT -m ipv6header --header esp -j ACCEPT
+-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
+-A INPUT -p ipv6-icmp -j ACCEPT
+<%
+  firewall_rules.each do |rule|
+    rule = /(tcp|udp)\/([\d:]+)( .+)?/.match(rule)
+    if not rule[3] or IPAddr.new(rule[3].strip()).ipv6?
+-%>
+-A INPUT<% if rule[1] == "tcp" %> -m state --state NEW<% end %> -m <%= rule[1] %> -p <%= rule[1] %><% if rule[3] %> -s<%= rule[3] %><% end %> --dport <%= rule[2] %> -j ACCEPT
+<%
+    end
+  end
+  firewall_custom.each do |rule|
+-%>
+<%= rule %>
+<% end -%>
+-A INPUT -j REJECT --reject-with icmp6-adm-prohibited
+-A FORWARD -j REJECT --reject-with icmp6-adm-prohibited
+COMMIT

firewall/templates/iptables.erb

@@ -7,11 +7,17 @@
 -A INPUT -p esp -j ACCEPT
 -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
 -A INPUT -p icmp --icmp-type any -j ACCEPT
-<% firewall_rules.each do |rule| -%>
-<%   rule = /(tcp|udp)\/([\d:]+)( .+)?/.match(rule) -%>
+<%
+  firewall_rules.each do |rule|
+    rule = /(tcp|udp)\/([\d:]+)( .+)?/.match(rule)
+    if not rule[3] or IPAddr.new(rule[3].strip()).ipv4?
+-%>
 -A INPUT<% if rule[1] == "tcp" %> -m state --state NEW<% end %> -m <%= rule[1] %> -p <%= rule[1] %><% if rule[3] %> -s<%= rule[3] %><% end %> --dport <%= rule[2] %> -j ACCEPT
-<% end -%>
-<% firewall_custom.each do |rule| -%>
+<%
+    end
+  end
+  firewall_custom.each do |rule|
+-%>
 <%= rule %>
 <% end -%>
 -A INPUT -p tcp -j REJECT --reject-with tcp-reset