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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. "郑氏见她手脚麻利，就像大户人家丫鬟似的，动作细心神情贴心，一副乖巧听话的模样，心中酸楚，便柔声夸道：我闺女就是能干。"Is there any difference between their tooth shape and the canine teeth of ordinary carnivores?" I cut in a question.《浮沉》根据同名网络小说改编，除了外企的销售之争，更有大型国企在改制进程中遭遇的种种现实困惑，覆盖了职场各层次人群的生存状态。Let's first implement the following simple publish-subscribe mode. The code is as follows:新封的玄武候竟然就是张家长子。1