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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.《多样的儿媳》讲述一对冤家双胞胎姐妹恩星(咸恩静 饰)与金星(李珠妍 饰)成为宿仇对家的儿媳后重逢发生的冤家故事[2]  。在剧中，恩静将饰演从小就与异卵双胞胎姐姐在妈妈的差别待遇下长大的出版社职员兼代笔作家黄恩星（音译）。汤颖过12岁生日那天，失去了父母和哥哥。那场致命的车祸只有她一人幸存下来。她昏睡了13年，醒来后仿佛睡了一觉。她以为自己还是12岁，但实际上她已经是个25岁的女人。12岁的灵魂困在25岁的肉体，让她痛苦不堪，更叫她痛苦的是，她已没有家人。讲电话，以严厉的语气警告对方不要伤害他的家人。那起事故是否是人为的？如果是的话，那就不是意外，而是谋杀！她知道自己如果要解开这谜团，就必须让自己快速长大，让心智与身体一样成熟。她以一年的时间自修：读书、认识这个转变中的世界。 　　这期间，有个年轻人邹杰明一直陪伴她左右。邹杰明从小自闭，不懂人情世故，但对汤颖却有种微妙的感情。他喜欢汤颖，只是无法宣之以口。他头脑异于常人，对某些领域的认识“出神入化”，汤颖在他协助下，揭开许多难解之谜。 　司徒东城，一个落魄的前律师，也在汤颖的生命中占了重要的位置。两个人同样“失去了一切”，更能互相扶持、鼓励。韩大使驻派美国之前主持破获了中涛犯罪集团的走私活动。在美国，中涛指示手下绑架了韩大使的女儿素洋。FBI闻讯展开全面调查，韩大使执意要求调派香港的老搭档李督察前来协助。FBI派出洛杉矶警察局状况不断的问题警探卡特作为李的搭档。卡特作风张扬高调，李则身手不凡、低调谨慎，这对临时组合的东西搭档闹出不少误会和笑话。但随着一次次危机发生，两人渐渐培养出默契。他们的营救行动最终能否成功——看完这篇洋洋洒洒的《伤天启》，陈启不禁笑了。Decorator mode focuses on stable interfaces and extends functions for objects on this premise.她看向昏迷的金富贵。