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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. "Public void notifyObservers () {Take some compliments as spring.爹没读过书，也说不好，反正爹就是这么想的。在20世纪70年代的辰英国，三个蓝领好友整天过着相互逗乐，喝酒，打架，泡妞的生活。弗雷迪（克里斯蒂安•库克）想离开工人阶级队伍，告别这样的生活方式。但是充满魅力的布鲁斯（汤姆•休斯）和可爱的失败者斯诺克（杰克•多兰）却很享受这样的幸福生活。而当弗雷迪获得了一份上门推销保险的推销员工作后，却在一天意外遇到了他旧时的老相好朱丽（菲丽希缇•琼斯），而同时，这个三人小团体也被迫抉择，是否要永远的改变他们当前的生活方式。苏岸更是感叹，这徐家真是跋扈嚣张，仗着自己的实力就敢出言不逊，恃强凛弱。On a continent with beautiful scenery like dreams, there are high winds, flowing fires, fantasy of three flying kingdoms and a mysterious island. All the subjects in the three countries are racing drivers. On this continent, the stronger the racing level, the more people will respect it. The person with the strongest racing level will be elected king.