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The first packet discarding scheme will have a slight impact on the user experience, because discarding the first packet retransmission will increase the response time of the service. In view of this, a better TCP Proxy scheme has been developed. All SYN data messages are accepted by the cleaning equipment and processed according to the SYN Cookie scheme. The IP address that successfully established the TCP three-way handshake with the device is determined to be a legitimate user to join the white list. The device disguises the real client IP address, completes the three-way handshake with the real server, and then forwards the data. However, if there is no IP address that shakes hands with the device three times within the specified time, it is determined that the malicious IP address is blocked for a certain period of time. In addition to SYN Cookie combined with TCP Proxy, the cleaning equipment also has the ability to detect a variety of abnormal TCP flag bit packets, and identifies normal access and malicious behavior by returning unexpected responses to SYN messages to test client responses.　　这是一个波澜壮阔的恐龙世界，这是一个生命成长的伟大历程，这是一个亲情友情的永恒主题，这是一个奇异多彩的历险经历！动画片《渴望蓝天》，为你展现史前生物时代的恐龙史诗！Test Class林聪点点头，他们才退下。姜玮被这番不留情面的话说得哑口无言，张大嘴巴，眼睁睁地看着他出院下山去了。陈启、所有网文作者、所有网文读者、乃至所有和网文有关的人员都相信，网络文学还会更加快速的成长，长成一棵巍峨的参天巨树。2. Different materials and processes: