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The attacker first completes the three-way handshake to establish the connection, but in the last ACK reply of the three-way handshake, the TCP window size is set to 0, and then a data request is made. When the attack target sends the request result to the attacker, it stops the data transmission when it finds that the TCP window size is 0, and sends out a TCP window detection packet to ask the attacker if the TCP window has been updated. Since the attacker will not update the window size, the attack target will always maintain the TCP connection and wait for the data to be sent, and continuously carry out TCP window size detection. When the number of controlled hosts in the botnet is large, Target's connection table will gradually be exhausted, resulting in denial of service.= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =本剧充满了青春、爱情、奇幻元素，描述边缘工具人高中生赵龙杰（蔡凡熙饰）在唯一的亲人爷爷过世后，莫名其妙被海中小霸 王美男鱼李仁宇（禾浩辰饰）给缠上，为寻找将仁宇送回海裡的方法，2个冤家不得不展开祕密的同居生活，进而踏上一段荒谬又疗癒的成长之旅。However, once again, when iptables rules are not saved, please do not empty the rules in the chain or table unless you understand what you are doing.几乎到一个临界点，爆发只是时间问题。