US Patent No. 9,300,623

DOMAIN NAME SYSTEM CACHE INTEGRITY CHECK


Patent No. 9,300,623
Issue Date March 29, 2016
Title Domain Name System Cache Integrity Check
Inventorship Bryson Earl, Altamonte Springs, FL (US)
Todd M. Szymanski, Winter Park, FL (US)
Assignee Sprint Communications Company L.P., Overland Park, KS (US)

Claim of US Patent No. 9,300,623

15. A domain name system checking server, comprising;
a processor;
a memory; and
an application stored in the memory that, when executed by the processor,
accesses a plurality of domain name to internet protocol (IP) address mappings stored by a plurality of DNS cache servers,
compares the plurality of domain name to IP address mappings stored by the plurality of DNS cache servers,
requests at least one domain name to IP address mapping for at least one domain name accessed from at least one of the DNS
cache servers from an authoritative DNS server, and

stores the at least one domain name to IP address mapping received from the authoritative DNS server in at least one DNS cache
server.