目前，我运行一个 DNS 服务器（bind9），它处理来自 Internet 上的客户端的查询，最近我注意到来自所有不同地址的数百个查询看起来像这样（服务器 IP 已删除）
client 216.59.33.210#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 216.59.33.204#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 208.64.127.5#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 184.107.255.202#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 208.64.127.5#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 208.64.127.5#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 205.204.65.83#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 69.162.110.106#53: query: ripe.net IN ANY +ED (0.0.0.0)
client 216.59.33.210#53: query: ripe.net IN ANY +ED (0.0.0.0)
client …