Method and device for detecting flood attacks

摘要

Disclosed is a flood attack detection method, wherein the total number of keywords of a source packet is acquired, and the number of feature parameters corresponding to the source packet is acquired. A ratio of the number of feature parameters to the total number of keywords is compared with a preset threshold, and if the ratio is greater than or equal to the preset threshold, it is determined that a flood attack occurs.

主权项

1. A flood attack detection method, the method being carried out by a computer device having a processor, comprising:
receiving, by the device, source packets transmitted from a plurality of hosts, wherein the source packets include text content; and counting, by the device, a total number of the received source packets carrying a keyword in a predetermined time to obtain a total number of the source packets with the keyword, wherein each received source packet's text content carries the keyword; obtaining, by the device, a number of failure response packets in response to the received source packets transmitted from the plurality of hosts, wherein each of the failure response packets is generated and sent by a destination host of a source packet in the source packets, and indicates a request for resource on the destination host which causes a failure; calculating a ratio of the number of the failure response packets to the total number of the source packets with the keyword; and determining that a flood attack has occurred when the ratio exceeds or is equal to a preset failure threshold.