SDN network access method and system

A network access and message technology, applied in the field of computer networks, can solve the problem of not being able to defend or resist SYN-Flood attacks, and achieve the effect of defending against SYN-Flood attacks and improving transmission efficiency.

Active Publication Date: 2014-12-03
东莞市鸣鹿信息科技有限公司
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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an SDN ...

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  • SDN network access method and system

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Embodiment Construction

[0032] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, ...

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Abstract

The invention provides an SDN network access method and system. The SDN network access method comprises the steps that a controller receives an SYN message; the controller saves the SYN message and sends the SYN message to a server; the controller receives a response message, sent by the server, of the SYN message, saves the response message, sends the response message to a client side and starts to perform timing within preset time; if the controller receives an ACK response message of the response message before timing is over, timing is ended, and the ACK response message is sent to the server; if the controller does not receive the ACK response message of the response message till timing is over, the controller utilizes the saved message to construct an RST message and sends the RST message to the server. According to the scheme, the SDN network access method and system can defend against an SYN Flood attack.

Description

technical field [0001] The invention relates to a computer network technology, in particular to an SDN network access method and system. Background technique [0002] SYN Flood (also known as SYN flood, or synchronous flood) is one of the methods of DoS (Denial of Services, denial of service attack) and DDoS (Distributed Denial of Services, distributed denial of service attack), which uses TCP A flaw in the implementation of the / IP protocol. A large number of forged SYN messages are used to initiate a connection to the server. Since the source addresses of these SYN messages do not exist, the server cannot receive the corresponding response message and has to wait for the SYN timeout. In order to release the corresponding resources, the server system resources are exhausted, resulting in the inability of normal users to access. [0003] At present, there are the following several defense methods for SYN Flood in computer networks: one is the method of server host defense, ...

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Application Information

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IPC IPC(8): H04L29/06H04L1/16
Inventor 王超
Owner 东莞市鸣鹿信息科技有限公司
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