# File lib/s3/right_s3_interface.rb, line 111
        def is_dns_bucket?(bucket_name)
            bucket_name = bucket_name.to_s
            return nil unless (3..63) === bucket_name.size
            bucket_name.split('.').each do |component|
                return nil unless component[/^[a-z0-9]([a-z0-9-]*[a-z0-9])?$/]
            end
            true
        end