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发明公开
CN105472057A 一种针对DNS中不存在域名查询的处理方法 有权

一种针对DNS中不存在域名查询的处理方法
摘要：
本发明属于互联网络技术领域，尤其涉及一种针对DNS中不存在域名查询的处理方法，包括：在递归服务器中缓存NSEC或NSEC3资源记录，转发服务器从递归服务器中获得并缓存NSEC或NSEC3资源记录，当用户连续查询NSEC或NSEC3资源记录中确定的不存在域名时，递归服务器或转发服务器根据NSEC或NSEC3资源记录的信息直接返回给用户NXDOMAIN消息。本发明能够降低不存在域名的查询时延，同时能够减少对域名的权威服务器的查询次数，降低权威服务器的资源消耗。可以避免大量不存在的TLD的查询。能够很好的解决Water Torture问题，不会对权威服务器产生影响。
摘要（英）：

The invention belongs to the Internet technology field and especially relates to a processing method of inexistence domain name query in a DNS. The method comprises the following steps that an NSEC or NSEC3 resource record is cached in a recursive server; a forwarding server acquires and caches the NSEC or NSEC3 resource record from the recursive server; when a user continuously inquires a determined inexistence domain name in the NSEC or NSEC3 resource record, the recursive server or the forwarding server directly returns an NXDOMAIN message to the user according to information of the NSEC or NSEC3 resource record. By using the method, query time delay of the inexistence domain name can be reduced; a query frequency of an authoritative server of the domain name can be decreased and resource consumption of the authoritative server is reduced; a lot of inexistence TLD query can be avoided; and a Water Torture problem can be well solved and does not generate an influence on the authoritative server.

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