DNS
DNS resolution in five observable steps
A practical trace from typed domain to returned address.
Read article →The infrastructure field guide
Articles
Original guides and considered notes from the publication.
Email infrastructure
SPF, DKIM and DMARC do different jobs
Three controls, one identity story—and no magic switch.
Read article →Web operations
Plan a DNS change without guessing
Lower risk with a small runbook and explicit rollback point.
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