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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.CAfter Mary's birthday, Sarly's birthday, Let's not ask her to choose for herself. Otherwise, this month's food expenses will definitely be over. Take out the photos I took on the top of Huashan Mountain last year, write "The best gift is Fita who loves you" on the back, then go to the gift shop on the street to buy a picture frame, and then find Mike, who works in art design next door, to design a beautiful box to pack it up … The others are all Decorators, and they are all decorating me in the end.回到荥阳之后，汉王一定会大为封赏的，一想到这里随何就激动不已。I'm finally going to have a third attack!季布脑中灵光一闪，似乎有些明白了霸王的意思，彭城西南方向一带正是谷水和泅水。新兵张本旺从新兵连分到连队，被同年兵牛爱国无意间捕捉到一个重要信息——张本旺与即将分配到的这个部队有关系。而更为巧合的是，张本旺的关系竟然就是自己这个连队的新任连长刘建锋。 当张本旺在连队有关系的消息蔓延开来时，班里同志从各自不同的角度对张本旺开始了刮目相看。副班长胡成功出于社会关系学的考虑，对连长把个人关系安排在一班里视作对本班最大的信任和考验。从分配铺位到安排工作，胡成功处处体现着对张本旺的照顾·····