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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.天啊，国术太厉害了。花园发生的事情太过突然，不过好在尉缭就在附近。不跟他去漠西，他就有机会。Conners已更新！ 美国广播公司娱乐公司总裁Karey Burke宣布，美国广播公司电视网已下令第二季大一喜剧。英俊帅气、年轻有为的泰德•格雷（Milo Ventimiglia 米洛•文堤米利亚 饰）事业爱情双得意，他以优异的成绩从哈佛医学院毕业，随后被推荐进入全国最有名的病理学研究小组；另一方面，泰德和女友格雯（Alyssa Milano 阿莱萨•米兰诺 饰）感情顺利，令人欣羡。沛县，炎炎夏日，许久无雨，热的人坐卧不宁，汗水滚珠般滴落。