Method and computer readable medium for discovering master DNS server computers for a given domain name in multiple master and multiple namespace configurations
US6381627B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Sep 21, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/4552
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention detects multiple master DNS server computers and handles multiple namespaces. In traditional DNS, each zone or domain has a primary or master server computer as well as one or more slave server computers. Both the master server computer and the slave server computers have complete information regarding a particular zone. The master server computer is distinct in that it receives changes made by a client. The slave server computers periodically update their own information from the master server computer. In multiple master DNS, each server computer is essentially a primary server computer in that any server computer may accept updates from a client. This information is then distributed to the other multiple master server computers. In order to determine whether a server computer is a multiple master server computer an analysis must be has as to the SOA record, which contains the name of the primary server computer as well as the zone for which the primary server computer is authoritative, and the NS record set, which holds the names of all server computers. The analysis of these records determines which server computers are multiple master DNS server computers. A clie…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.