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Hunan Province{时装中篇剧《还我本色》，描述人在黑社会打滚，原因各异，际遇各有不同，一旦踏足，却不能自拔，最终是潦倒一生，难道真的「人在江湖、身不由己」？修炼之人都能看到天机，但是根据修为不同，看到的天机也不尽然一样。The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.刘井儿道：等打完了仗，我再回来就是了。