Blog

How DNS Queries Work — and How to Run One Yourself

A DNS query is more than a name-to-address lookup. Learn how the message is structured, how recursive and iterative resolution actually differ, and how to run and read queries with dig, nslookup, and Resolve-DnsName — including why resolvers can legitimately disagree without any propagation delay at all.

CNAME Records for Subdomains: How They Work and What Breaks If You Don’t Follow the Rules

A technical guide to using CNAME records for subdomains: the two DNS rules that govern them, why wildcard CNAMEs don

CAA Records: Setup, Errors, and the 2027 ACME Requirement

A CAA record guide covering tag syntax, subdomain inheritance, five common failure causes, and the ACME account-binding rule CAs must support from March 2027.