-property :family, :kind_of => [String, Symbol]
-property :source, :kind_of => String, :required => true
-property :dest, :kind_of => String, :required => true
-property :proto, :kind_of => String, :required => true
+property :context, :kind_of => Symbol, :required => true, :is => [:incoming, :outgoing]
+property :protocol, :kind_of => Symbol, :required => true, :is => [:udp, :tcp]
+property :source, :kind_of => [String, Symbol, Array]
+property :dest, :kind_of => [String, Symbol, Array]