DNS2026-10-09
DNSSEC and SERVFAIL: Find the Cause of Resolution Failure
Diagnose SERVFAIL using detailed DNS errors, the DS/DNSKEY chain and signatures, then verify the repair with DNSSEC validation enabled.
5 min read
DNS2026-10-08
DNS TTL: Investigate a Change of IP Address
Reconstruct DNS address changes using dated responses, caches and network views, without confusing TTL with the lifetime of a threat.
5 min read
DNS2026-10-07
NXDOMAIN: Diagnose a DNS Security Anomaly
Separate nonexistent names, negative caching, filtering and suspicious activity before treating NXDOMAIN errors as a security incident.
5 min read
Threat Intel2026-09-09
Investigate an IOC Alert: Link IP, DNS and Process Logs
An IOC match is an investigation lead. Correlate DNS, network connections and process records to establish what happened on the endpoint.
6 min read