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"Web Security" CSRF Attack and Defense, the First Defense Line for Web SecurityIn TCP protocol, messages arriving at the destination will enter the buffer of the TCP stack and will not be forwarded to the receiving system until the buffer is full. This is to minimize the number of times the system empties the buffer. However, the sender can force the receiving system to clear the contents of the buffer by sending a TCP message with a PSH flag of 1. The TCP PUSH + ACK attack, like the TCP SYN attack, aims to deplete the resources of the victim system. When an attacker sends TCP messages with PSH and ACK flags set to 1 to the Target host, these messages will cause the Target system to clear all TCP buffers (whether the buffers are full or not) and respond with an acknowledgement message. If this process is performed by a large number of controlled hosts, the system will not be able to process normal data, resulting in denial of service.朱九妹、钱多文、孙志国、李增原为上界啸天战士，因为种种原因被贬入凡间投胎做人。二郎神发现魔界入侵中土，为了抵御侵袭，他找到了四位啸天战士，朱九妹，钱多文，李增，孙志国四人从平凡甚至有着这样那样的缺点的普通人，最终成长为团结一致、目标明确、英勇善战的巨灵战士，这四位战士毅然决然接受使命寻找对付魔界的办法。黎章上前恭敬地应道：属下谢将军体恤。如果睡觉能赚钱，如果做梦能致富，但是要付出代价，你加入吗？夏正拱手道：在此恭候船主成王。登录人数越来越多，在线人数也越来越多……毫无疑问，《笑傲江湖》大火起来。