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He said the problem was that he forgot to disable recursive queries on the server, which made his server a tool used by DNS amplification attacks. He explained: "DNS servers can be configured in one of two basic ways. In one possible configuration, the DNS server only provides domain name services (imperative) for the objects it is responsible for serving. In another configuration, in addition to providing those domain name services, the DNS server also searches for any domain (recursively) on the wider Internet that it was not authorized to manage. It is the recursive DNS server that enables the Internet to operate normally. They are also a way of attack. "这部系列剧讲述了四名在圣犹大医院一线工作的年轻护士，他们献身于帮助他人，同时思考如何帮助自己。ChannelId郑朝阳来到西柏坡参加了接管城市的学习班，而他历尽艰险带回的名册则给北平地区潜伏的国民党特务毁灭性的打击。科学家找来一群普通善良百姓，随机分成两组，由几个人扮演"狱卒"来管理别人扮演的"囚犯"，来模拟一周的监狱生活。开始时大家嘻嘻哈哈，后来狱卒开始使用权力维持秩序，随后发展到滥用权力、私刑、发泄个人情绪。几年后，闫夏帮助自己的弟弟去追一个女孩，谁知这女孩却正是失踪多年的韦雪。当年韦雪骗走闫夏所有的钱，害得闫夏差点自杀。闫夏害怕韦雪像当年伤害自己一样，再来伤害自己的弟弟，便假意与韦雪重修旧好。殊不知，一次更大的危机，正在悄悄酝酿。一个如幽灵般诡异的身影，时刻潜伏在闫夏身边，像是索命游魂，用一双眼睛死死盯着闫夏。不用少，单单是联络巴蜀琴氏就已经是大功一件。