# File lib/vagrant-lxc/action/clear_forwarded_ports.rb, line 36
        def redir_pids
          @redir_pids = Dir[@env[:machine].data_dir.join('pids').to_s + "/redir_*.pid"].map do |file|
            port_number = File.basename(file).split(/[^\d]/).join
            [ File.read(file).strip.chomp , Integer(port_number) <= 1024 ]
          end
        end