Lock-free updates to a domain name blacklist
US9264399B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2015 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Aug 18, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/101
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method updates a domain name system blacklist in a lock-free manner is disclosed. In the method, an entry of the domain name blacklist is read at a DNS resolver in a plurality of DNS resolvers. The entry specifies 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, an updated entry of the domain name blacklist is received, a new record to the domain name blacklist is added, and the entry being read is placed into a garbage pool having a current version number. Independently from the reading of the entry, the current version number is incremented and a new garbage pool is created for the incremented version number. When the reading is complete, the current version number is assigned to the DNS resolver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.