{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9742799","patent":{"patent_number":"US-9742799","title":"Client-side active validation for mitigating DDOS attacks","assignee":null,"inventors":[],"filing_date":"2016-10-14T00:00:00.000Z","publication_date":"2017-08-22T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L","H04L","H04L","G06F","G06F","H04L"],"num_claims":20,"abstract":"Methods and systems for mitigating denial-of-service attacks include a proxy server that monitors a set of application servers configured to receive and service requests from clients. The proxy server intercepts the requests, and in response, provides the clients with customized client-side scripts embedded in markup language. The client-side scripts may include random strings to generate follow-through random uniform resource identifier redirection requests expected by the proxy server. The client-side scripts, upon execution, may challenge the clients by demanding user interaction within a specified period of time, requesting a delay before responding, and/or attempting to set a challenge cookie multiple times. If a client provides the demanded user interaction within the specified time, honors the delay, and/or sets the challenge cookie with the correct value, then the client-side scripts may generate a redirection request expected by the proxy server for that client and the proxy servers may whitelist that client for a configurable duration and forward that client's subsequent requests to the application servers without challenge."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Client-side active validation for mitigating DDOS attacks","description":"Methods and systems for mitigating denial-of-service attacks include a proxy server that monitors a set of application servers configured to receive and service requests from clients. The proxy server","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9742799","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9742799","citation_suggestion":"Patentable. \"Client-side active validation for mitigating DDOS attacks\" (US-9742799). https://patentable.app/patents/US-9742799","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9742799","json":"https://patentable.app/api/llm-context/US-9742799","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:40:24.631Z"}