DHT is conventional and popularly used in Peer-to-Peer system; BitTorrent [10][11][12][13][15] are examples of system or research related to DHT. DHT is also considered to support the Domain Name System (DNS) [12][13][15]. DNS which is used to translate domain name into IP address is a hierarchical distributed naming system [14]. Each node or leaf has resource records which contain domain name information. The tree is divided into zones. Each zone contains one or many domains. The tree begins at root zone. When a client wants to look up a domain name, the client sends request to root. Based on resource records, the root returns information of next node. If the node is responsible for the domain name, the node will return the IP address and the lookup process will end; otherwise, the node will return the information of next node. Cox implemented and evaluated DDNS, which is a system that is based on Chord and has the same function of DNS [15]. DDNS is self- configurable, so DDNS eliminates the pain of name server administration. DDNS also inherits good load balancing and fault tolerance. As we can see, DNS has the similar structure with Eduroam. Therefore, combination of DHT and Eduroam puts forward a promise to improve scalability and self-configuration to the Eduroam system.