Externally applying internal network domain name system (DNS) policies
US11122004B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2016 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | May 11, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2101/668
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a global domain name system (DNS) server processes a DNS query based on an internal network policy. Upon receiving a DNS query that is associated with a source IP address, the global DNS server identifies a client subnet based on the DNS query. The client subnet is associated with an internal device on an internal network. The global DNS server selects an internal network policy from multiple predetermined policies based on the source IP address and the client subnet. The global DNS server then tailors one or more DNS resolution operations that generate a response to the DNS query based on the selected internal network policy. Advantageously, the client subnet provides the global DNS server with visibility into the internal network. Such visibility enables the global DNS server to apply policies selectively at the granularity of individual devices on the internal network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.