Formulating responses for slowing requests from malicious domain name system (DNS) clients
US12170690B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2022 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | Apr 14, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/144
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of delaying computer network clients from sending DNS queries. The method includes receiving a DNS query from a client and consulting a client record in a client record database and/or a flow record in a flow record database storing information about the flow including about one or more previous DNS queries and/or responses in the flow. The method further includes formulating a response to the DNS query as a function of the information about the client and/or the information about the flow, updating the client record with information about the client and/or the flow record with information about the DNS query and the response as formulated, and transmitting the response as formulated to the client. The DNS query includes a question and the response is intentionally defective or incomplete and causes the client to be delayed in sending another DNS query as part of an attack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.