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In addition, system administrator Trevor Pott posted a full and accurate blog post on The Register website (see for details). He admitted that he accidentally became an accomplice to DDoS attacks because "he made a simple configuration error while building a DNS server on the edge of his network. "He called it an" edge scrubber "that acts as a router, distributing IP addresses to servers and routers in the data center. It also represents all other devices on the network, "playing a variety of" boring and rough work "functions. It is a data center/local network time server, an external DNS server, an edge server, and a bandwidth limiter.秦淼就开心地笑了。他被咱们追得屁滚尿流，好容易逃到这。5. Find customers through your competitors反正他家本来对咱们也没好感，再让步也不会得他们感激，闹翻了也好。Some DNS servers will recursively send query requests to the upper DNS servers and wait for a response when they cannot obtain the resolution results of domain names, which further increases the resource loss of the servers.