Dealing with temporary domain name issues in the DNS

Recently, a new type of domain names, namely temporary domain names, has become heavily used by many kinds of Internet services, such as cloud storage and social networks. Generally, these services would generate a large volume of temporary domain names within their private domain zones, and use them to convey “one-time-signals” with their customers. By analyzing the real world DNS traffic, we find that over 40% of observed domain names from the Internet are temporary. While this creative usage of temporary domain names could benefit many Internet services, it may also cause some unanticipated (even negative) consequences to the DNS infrastructure. In this paper, we first describe the critical features of temporary domain names and present our observation results of their pervasiveness based on real world DNS traces collected from some major ISP. Then we verify and analyze quantitatively the negative impact that temporary domain names would cause on the DNS, especially on the DNS caching functionalities. To solve this problem, we finally introduce segmented caching strategies into the DNS cache, and further validate its capability for ensuring the effectiveness of DNS caching when facing the temporary domain name problems.