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The principle is that syn messages are first responded to syn_ack by DDOS protection system. With a specific sequence number (recorded as a cookie). The real client returns an ack and the Acknowledge number is cookie+1. The fake client will not respond. In this way, we can know that the clients corresponding to those IP are real and add the real client IP to the white list. The next access passes directly, while other forged syn messages are intercepted. The following is a schematic diagram of protection:?ExecuteDispatch不过放大了些而已，是以林聪一眼就认出了妹妹。与所有中国农民一样，新中国发展、变化的脚步，必然引起、影响到石大夯、韩天寿和东堤村农民们的生活变化，影响到他们的人生观念和心路历程，旧体制固有、陈腐的土地观念和封建意识，必然要与新时代纷沓而至的新思想、新观念产生矛盾和冲撞，催生、促动石大夯、韩天寿和东堤村人的生活、精神与心理产生裂变，从而发生了这个进步与落后、公与私、高尚与低劣、情感交融，充满着喜怒哀乐、悲欢离合的故事。首档蜜孕生活真人秀，聚焦首胎孕妈的双重生活，三种不同类型家庭的孕期生活实录 。　　对于卢卡斯，这只是烦恼的开始，他参加了由马蒂诺先生开设的哲学补习班，而后者将被证实是那位漂亮女子的父亲……