Initial version of firewall module.

firewall/templates/iptables.erb

@@ -0,0 +1,17 @@
+*filter
+:INPUT ACCEPT [0:0]
+:FORWARD ACCEPT [0:0]
+:OUTPUT ACCEPT [0:0]
+-A INPUT -i lo -j ACCEPT
+-A INPUT -p ah -j ACCEPT
+-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) -%>
+-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 -%>
+-A INPUT -p tcp -j REJECT --reject-with tcp-reset
+-A INPUT -j REJECT --reject-with icmp-port-unreachable
+-A FORWARD -j REJECT --reject-with icmp-host-prohibited
+COMMIT

firewall/templates/pf.conf.erb

@@ -0,0 +1,19 @@
+# options
+set block-policy return
+set skip on lo0
+
+# scrub
+scrub in all no-df
+
+# filter rules
+block all
+
+pass in quick inet proto icmp all
+pass in quick inet6 proto icmp6 all
+
+<% firewall_rules.each do |rule| -%>
+<%   rule = /(tcp|udp)\/(\d+)( .+)?/.match(rule) -%>
+pass in quick proto <%= rule[1] %><% if rule[3] %> from<%= rule[3] %><% end %> to port <%= rule[2] %>
+<% end -%>
+
+pass out quick all