DNS Control Module Detecting Fraudulent Requests via Preliminary Verification

The patent applies preliminary action by verifying DNS requests before processing them through the normal DNS resolution pathway. The control module checks criteria such as domain name patterns, query frequency, and source IP reputation in advance, preventing fraudulent requests from consuming network resources or generating harmful traffic before they can cause damage.

The patent introduces an intermediary control module that sits between the DNS resolver and the authoritative DNS servers. This mediator verifies DNS requests by checking domain names against known fraudulent patterns, analyzing query characteristics, and allowing legitimate requests to pass through while blocking malicious ones, thereby preventing fraudulent access without requiring complete redesign of the DNS infrastructure.

The patent applies local quality by implementing selective verification only for specific DNS request characteristics that indicate potential fraud, such as domain names matching known malicious patterns, unusually high query frequencies from single sources, or requests for domains not previously cached. Legitimate DNS requests that do not exhibit these characteristics are processed normally without additional verification overhead, minimizing information loss while preventing fraudulent access.