Robust Domain Name Resolution

A method of processing domain name system requests, comprising:

• monitoring one or more authoritative nameservers for one or more anomalies, the one or more authoritative nameservers containing domain name information for a first domain name;
• storing at a recursive nameserver a domain name record including at least a portion of the domain name information for the first domain name, the domain name record including a TTL value;
• and
• in response to the one or more anomalies at the one or more authoritative nameservers, modifying the domain name record for the first domain name at the recursive nameserver.

A computer-implemented method of processing domain name system requests, comprising:

• storing at a recursive nameserver domain name information for a plurality of domain names including a first domain name;
• issuing a domain name system (DNS) request for the first domain name to one or more authoritative nameservers associated with the first domain name after said storing;
• in response to a failure associated with the DNS request for the first domain name, identifying a subset of the plurality of domain names that are associated with the one or more authoritative nameservers;
• modifying the domain name information at the recursive nameserver for the subset of domain names in response to the failure associated with the DNS request for the first domain name.

A computer-implemented method of processing domain name system requests, comprising:

• storing at a recursive nameserver domain name information for a domain name using a first hashing parameter;
• issuing a domain name system request to one or more authoritative nameservers for the domain name after said storing;
• and
• storing the domain name information at the recursive nameserver using a second hashing parameter in response to a failure to receive a response from the one or more authoritative nameservers for the domain name information.