Method and device for preventing domain name system spoofing
US9419999B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Aug 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1458
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for preventing Domain Name System (DNS) spoofing includes: performing uppercase/lowercase conversion for letters of a DNS question field in a DNS request packet according to a preset rule; sending the DNS request packet; receiving a DNS response packet; obtaining uppercase/lowercase distribution of the letters of the DNS question field in the DNS response packet; and forwarding the DNS response packet to a target DNS client if the uppercase/lowercase distribution of the letters of the DNS question field in the DNS response packet complies with the preset rule. Corresponding to the method, a device for preventing DNS spoofing is disclosed. The method and device reduce occupation of storage resources of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.