Patent ID: 9264399
Filing Date: 2016-02-16
CPC Classification: H04L

Claim Text:
1. A computer-implemented method for lock-free updates to a domain name system blacklist, comprising: (a) reading, at a DNS resolver in a plurality of DNS resolvers, an entry of the domain name blacklist, the entry specifying a policy for the DNS resolver to execute when the DNS resolver receives a request to resolve a domain name; before the reading is complete: (b) receiving an updated entry of the domain name blacklist; (c) adding a new record to the domain name blacklist; (d) placing the entry being read into a garbage pool having a current version number; independently from the reading (a): (e) incrementing the current version number; (f) creating a new garbage pool for the incremented version number; and (g) when the reading is complete, assigning the current version number to the DNS resolver.