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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.　　阴错阳差后越洋交换了住所，她们的人生开始变得不同....Location: Auxiliary Equipment, Sorcerer's Stone新加坡警察高鸿源，与妻育有二子一女高广义(陈天文饰)、高扬名(陈汉玮饰)及高惠仙(里嫔饰)。因身为警察的本分，年轻时坚持逮补犯罪的多年邻居陈木水，坐牢期间木水妻子产下女儿去世，而后木水病死在监狱，留下三位孤苦无依的孩子，陈玉琴、陈阿锦(李南星饰)及陈玉敏(王爱玲饰)。高鸿源因多年邻居关系，十分照顾玉琴一家，但阿锦从小却十分痛恨亲手抓走父亲的高鸿源。这是一个关于宫廷密谋、江湖争霸的传奇故事，更是一曲乱世之中的爱情悲歌……北魏年间，孝明帝的妹妹元娟公主抗婚出逃，女扮男装进入民间，在艰苦的人生磨厉下，一天天走向成熟，从一个骄横任性的逃婚公主成为盖世无双的武林英雄。在朝廷权利之争的过程中，她历经艰险，与正直嫉恶的兵部尚书之子邵达练就了天下无双的“鸳鸯剑法”，共同战胜了与胡太后狼狈为奸、陷害忠良、密谋窃取帝位的丞相高俨，成为天下至尊的英雄。剧中尖锐的宫廷斗争、凄美的爱情悲剧、壮烈的江湖武打极其生动曲折，感人至深，震撼力强，具有强烈的可视性。不带这么玩人的。Li Qiang watched the operation of the assembly workshop of COMAC through real-time video. Photograph by Chen Zhengbao