DNS Guardian by EfficientIP is a protective DNS service that provides built-in security for cache, recursive, and authoritative DNS servers. It offers complete and real-time DNS Transaction Inspection (DTI), enabling an in-depth understanding of client request context. DNS Guardian analyzes transactions at the DNS server level, including queries, responses, fragments, and recursions, to enhance threat visibility beyond known attack patterns. It utilizes patented innovation to enable graduated and adaptive countermeasures according to threat analysis, ensuring service continuity and safeguarding data while reducing false positives. DNS Guardian protects against various DNS-based attacks, including cache poisoning, DDoS attacks, DNS tunneling, DGA malware, and UDP flood.