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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.5. Type O blood, we are all. What is the character of type O blood?李翰祥执导的《佛跳墙》共有四个单元，首个故事是描述一对母子因施予济公一碗豆浆而逃过丧命之危；其二则说济公帮助卖菜汉，逃离高利贷者的滋扰；其三则写济公以樱桃化夜明珠，将大盗教训一顿；最末一则是描写济公以巧计捉弄胡作非为的相爷父子。李翰祥借济公的善行，针贬权贵恶霸的种种恶行，为平民大众吐一口乌气。Lins Concubine 01女主人公何青从恋爱到结婚，成为母亲后离婚，单身后却成为第三者，因为子女、感情等诸多因素又欲与前夫复婚，在与老板共赴厦门的途中，却发生了意想不到的事..... 经过一连串的事件，女主又会有怎样不为人知的爱恨纠纷呢？该剧讲述了上世纪30年代上海滩显赫一时的豪门家族—沈家，光鲜亮丽表面背后所隐藏的重重谜团。(five) the amount of illegal is huge;