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:
Apr. 18, 2017
Filed:
Jun. 12, 2015
Huawei Technologies Co., Ltd., Shenzhen, CN;
Hong Sun, Beijing, CN;
HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, CN;
Abstract
An attack defense method and device, which relate to the communications field and effectively defend against a Secure Socket Layer (SSL) denial of service (DoS) attack behavior. The method includes after a Transmission Control Protocol (TCP) connection to a client is established, the attack defense device receives a key negotiation request message sent by the client; when a session monitoring table of the client exists, the attack defense device determines whether a session identity exists in the session monitoring table of the client; when the session identity does not exist, the attack defense device records the session identity into the session monitoring table, and determines whether a quantity of session identities of the client is greater than a first preset value; and when the quantity of session identities of the client is greater than the first preset value, disconnects the TCP connection.