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For spoofing attacks, the first thing to consider is to choose the address. For the attack to succeed, the host on the spoofed IP address must not respond to any SYN-ACK packets sent to them. A very simple method that an attacker can use is to disguise only one source IP address, and this IP address will not respond to SYN-ACK packets, perhaps because there is no host on this IP address at all, or because some configuration has been made to the address or network properties of the host. Another option is to disguise many source addresses, and attackers will assume that hosts on some of these disguised addresses will not respond to SYN-ACK packets. To implement this method, you need to recycle the addresses on the list of source IP addresses that the server wants to connect to, or make the same modifications to hosts in a subnet.隋朝末年，天下动荡，农民起义风起云涌，隋炀帝杨广眼见大势已去，为了拉拢唐国公李渊,便将自己的女儿若惜公主许配给李渊的儿子李建成，谁知李渊次子李世民与若惜公主早已私定终身，这门亲事导致弟兄二人的情感掀起了波澜。不久，隋炀帝被奸臣宇文化及所杀，隋朝垮台，李渊抓住机会，建立了唐朝。在唐朝建立过程中，李世民南征北战，立下了汗马功劳，被封为秦王。李建成却因是嫡长子，而被立为大唐太子。围绕在太子身边和秦王身边的政客们形成了两大政治势力，展开了明争暗斗。离婚后的陈小娜与心理医生李少阳感情升温，谁知李少阳竟然是谢玉锦失散多年的小儿子！默儿大叫道：不会伤人的。李天平（黄河 饰）是南安市局缉毒大队的一名警官。孟雪和男友在一家夜总会吸毒，男友吸毒过量死亡。李天平对此展开调查，不料牵出了一个又一个扑朔迷离的案件。而这些案件都与夜总会老板、自己的老同学兼好友傅俊辉（吕一丁 饰）有着千丝万缕的联系，李天平不得不开始调查自己的好友。这期间一直有个人不断给李天平打匿名电话，给了他很多有用的线索。案件越来越复杂，缉毒大队和刑侦大队并案调查。李天平从蛛丝马迹之间查出端倪——提供线索的神秘人物是傅俊辉的仇人，也是当年被自己亲手抓捕的闫松林（白红标 饰），此人想借警方报复傅俊辉并妄图接手傅俊辉的毒品王国。中秋之夜，最后的较量中，闫松林和傅俊辉等悉数落网。李天平、傅俊辉、闫松林或友或敌的众人被案件聚在一起，共同经历了一场良知与责任的考验。郑氏急忙问：可要紧？小葱摇头道：不要紧。