Secure domain name service in software defined network

Domain Name Service (DNS) is an important service generally used by other application layer protocols of TCP/IP protocol stack. These protocols use DNS to translate human readable web address to machine readable IP address which is then used by other protocols of network stack for communication between computers over the network. The correctness of DNS translation cannot be compromised as it may lead to unsecure transactions with in the network. Because of this, DNS is generally a soft target for attackers and is vulnerable to different security threats including DNS spoofing, DNS cache poisoning, etc. Many solutions for such threats are proposed for traditional IP network. In this paper we talk about security loops in DNS and propose a solution for it in Software Defined Network (SDN) environment.