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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.年轻有为的画家路治平有一个幸福美满的家庭，妻子党美艳温柔贤惠，儿子路小军聪明伶俐。但这一切，被路治平的研究生――年轻美貌的梅雨歌所打破。在梅雨歌的热烈追求下，路治平的防线开始动摇……沈心语她也喜欢《笑傲江湖》小说。20世纪80年代后期，狼牙侦察大队狙击手何卫东为救观察手范天雷，被外号“蝎子”的敌狙击手狙杀。何卫东四岁的儿子何晨光接过了父亲血染的79式狙击步枪瞄准镜。15年后，范天雷已是狼牙特战狙击手教官，他鼓励全国青少年级别的武术冠军何晨光、颇有打枪天赋的小混混王艳兵、朴实却有超常毅力的农村少年李二牛一起参军。Second, understand the monomer model这个女子似乎对这家4s店很熟悉，轻车熟路地走了进去。警察厅厅长认为旗下街的一间姑婆屋档了他的官运，欲除之而后快，于是找来奸人坚帮他去收回姑婆屋。姑婆屋的主人是刚才南洋归来的阿翠（叶童 饰），这是她买来供一班姑婆们养老用的。奸人坚用尽办法和阿翠斗气都没有拿到姑婆屋的屋契，于是，一条毒计又诞生了。