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If an attacker sends SYN packets quickly with their own undisguised IP address, this is a so-called direct attack. This attack is very easy to implement because it does not involve spoofing or modifying packets below the user layer of the attacker's operating system. For example, he can simply send many TCP connection requests to implement this attack. However, for this attack to work, the attacker must also prevent his system from responding to SYN-ACK packets because of any ACK, RST, or ICMP (Internet? Control? Message? Protocol) will cause the server to skip the SYN-RECEIVED state (go to the next state) and remove the TCB (because the connection has been successfully established or recycled). Attackers can do this by setting firewall rules, causing the firewall to block all packets (except SYN) to reach the server, or causing the firewall to block all incoming packets so that SYN-ACK packets are discarded before reaching the local TCP handler."Liu Guiduo was executed in the spring of 2016. While still inside, Once I walked past the room where Liu Guiduo was locked up in handcuffs and shackles. He saw me and raised his hand. At that time, he could only raise his right hand a little. He pointed at me and then withdrew it. He made a shot posture at the head with a smile on his face, just like I saw when he killed Second Officer Wang Yongbo. "有过这段爱，我便知足了。　　金姆，一个25岁的上班族，已经和他的学长戴一见钟情很久了。为了忘掉他继续生活，他决定和一个在酒吧遇到的陌生人发生一夜情。他不知道的是，这个陌生人会开始喜欢他到无可挽回的地步。FOX宣布续订新剧《路西法》第二季。"Charming China City? City Alliance" Builds a Platform for City Sharing and Co-constructionSyfy续订了《扫兴者》第四季和第五季。