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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.Teaching Physics with the Principle of Deliberate Practice//300…………………………………………………………楚汉广武山和谈就这样告一段落，张良也彻底松了一口气回到了荥阳城。赵文华气恼地坐在轿上，口中骂道：你看看，你看看，还不让我进去。黄观则面上若有所失。　　书灵在艰难抉择后，将笔记本的真相告诉韩颜敏，当发现自己的一切行为都是被眼前这个男人操纵的时候，韩颜敏开始怀疑这份感情的真实性，她又一次选择了封闭自己，流下来分离之泪。……当下，众人就在虎王寨住了下来。