The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2014
Filed:
Jun. 01, 2011
Shaobu MA, Beijing, CN;
Shaobu Ma, Beijing, CN;
Chengdu Huawei Symantec Technologies Co., Ltd., Chengdu, CN;
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.