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The most basic defense at the network layer is RFC? 2827 [3]. Using input source filtering, ISP refuses to route a packet whose source IP address does not belong to its source subnet further. Input source filtering can effectively prevent SYN flooding attacks disguised as IP. However, this method is useless at present because it is difficult to deploy on a large scale. Moreover, input source filtering cannot resist distributed attacks.During the TCP three-way handshake, the server will create and save the TCP connection information, which will be saved in the connection table structure. The size of the connection table is limited. Once the number of connections reaches the maximum storage amount of the connection table, the server will be unable to create the TCP connection.Output: command received!西佳敬（北野武饰）是一名警察，几年前儿子不幸死去，现在妻子（岸本加世子饰）患白血病已到晚期。好意让他去探望妻子的搭档堀部（大杉涟饰），则在任务中严重受伤，导致下半身瘫痪，与轮椅为伴。后来西在一次逮捕行动中处理失当，又导致后辈田中（芦川诚饰）丧生。引咎辞职的他，想着供养田中的寡妻（大家由佑子饰），接近并安慰老友堀部，黑社会紧追着他索讨利息，这一切都令西感到不堪重负。他决定铤而走险，做件冒险的事情，将一切做个了结。最后，西陪妻子做一次没有归途的旅行。刘光执导的电视剧《江城警事》将于2016年11月02日起在央视一套上映播出,该剧由林申(杨先)、杨烁(王欣伟)、张佳宁(张言)、王璐瑶(杨母)、蒋小涵(杨先妹妹)等主演。《江城警事》以公安系统一级英模、扬州市公安局社区民警陈先岩的先进事迹为原型，生动形象地诠释了公安机关在推进国家治理中不可或缺的重要作用，精彩演绎了人民警察为人民的家国情怀。主人公杨先(林申 饰)外貌平平，爱贫嘴，整日忙碌于社区家长里短的琐屑小事之间，但他有使不完的热心劲，用不尽的小智慧。本剧主要讲述杨先在解决一个又一个的问题时所流露出的真性情，怎么和像他一样普通的居民建立鱼水关系，以及在情与法两难之间做出的抉择，故事中还提到一对企业家的生死之争，在围绕着资本和市场开展着激烈相争的同时，他们又不失责任感的悲壮故事，同时，也讲述了几对年轻恋人，在各自的感情道路上，对生活、事业、爱情、婚姻的感受和领悟，这个故事，和大家身边发生或亲历的事情，没有多少区别，也许就是观众们自己的故事………职场菜鸟郝聪明因一场意外，撞破了拍卖会上的天价陨石钻戒，戒指中蕴藏的神秘力量诱发了池氏集团总裁池墨的另一重人格宋晓晓。此后，如韩剧男神般的宋晓晓与脑洞少女郝聪明谈起了恋爱，但因双重人格的相互转换，不知情的郝聪明与本是自己死敌的另一重人格霸道总裁池墨纠葛在一起。宋晓晓得知 池墨偷偷爱上郝聪明，对其展开了疯狂的报复，双重人格的秘密随时可能大白于天下。而此时，三年前导致池父死亡的那场离奇车祸，真相正一步步揭开，郝聪明与池墨的双重人格都陷入前所未有的危机中。A TCP connection is a quad, and a connection is uniquely determined by the source IP, the source port, the destination IP and the destination port. Therefore, if C wants to forge the packet from A to B, it should fill in the above-mentioned IP header and TCP header with the source IP, source port, target IP and target port. Here B is the server, IP and port are open, A is the target we want to attack, IP certainly knows, but the source port of A is not clear, because it may be randomly generated by A. Of course, if we can find out the rule of generating source port for common OS such as Windows and Linux, we can still do it. In addition, we can step on the connection port of Car A through a large number of controlled hosts.