# File firewall/lib/symbiosis/firewall/directory.rb, line 25
      def initialize(path, direction, chain = nil)
        raise Errno::ENOENT,path unless File.directory?(path)
        @path = path

        raise ArgumentError, "direction must be either incoming or outgoing" unless %w(incoming outgoing).include?(direction.to_s)
        @direction = direction

        @chain = chain
        @default = "accept"
      end