--- /dev/null
+# DO NOT EDIT - This file is being maintained by Chef
+
+# INTERFACE SOURCE ADDRESS
+<% node.interfaces(:role => :external).each do |external| -%>
+<% node.interfaces(:role => :internal).each do |internal| -%>
+<%= external[:interface] %> <%= internal[:network] %>/<%= internal[:prefix] %> detect
+<% end -%>
+<% end -%>