Domains & DNS
How DNS, domains, certificates and monitoring actually work — and what to check first when they don’t. No vendor pitches, no listicles.
Domains & DNSOct 21, 2026 · 5 min read
How to transfer a domain to another registrar, step by step
A practical walkthrough for moving a domain between registrars without downtime, covering unlocking, auth codes, timing, and the mistakes that cause failed transfers.
Domains & DNSOct 5, 2026 · 6 min read
Dangling DNS records and subdomain takeover: how to find and remove them
Learn how deleted cloud resources turn into dangling DNS records attackers can claim, and get a practical process for auditing and cleaning up a zone.
Domains & DNSSep 25, 2026 · 5 min read
Move DNS between providers with a zone file
Manual DNS migration loses records and imports can silently fail. Learn how a standard zone file lets you preview every change before you switch providers.
Domains & DNSSep 14, 2026 · 5 min read
Reverse DNS explained: PTR records and why mail servers need them
Reverse DNS maps an IP address back to a hostname using PTR records. Here's how it works, why mail servers check it, and how to set it up.
Domains & DNSAug 21, 2026 · 6 min read
What is DNSSEC and should you enable it?
DNSSEC stops attackers from forging DNS answers, but it's opt-in everywhere and easy to misconfigure. Here's the threat it solves, the trade-offs, and when to turn it on.
Domains & DNSAug 14, 2026 · 4 min read
Why infrastructure inventory is important (and what to track)
An unmanaged domain, a forgotten server, or an expired certificate can take down production. Here's why infrastructure inventory is the foundation of reliable, secure operations.
Domains & DNSJul 31, 2026 · 6 min read
DNS propagation explained: why changes take time and how to check
DNS propagation isn't a global sync — it's TTL-based caching. Here's what actually controls the delay and how to check a change safely.
Domains & DNSJul 29, 2026 · 5 min read
Cloudflare DNS not updating: causes and how to fix it
Changed a DNS record in Cloudflare and nothing seems different? Here's how to tell a caching delay apart from a real config problem, and how to fix each.
Domains & DNSJul 27, 2026 · 7 min read
20 DNS security checks every domain should pass
A practical DNS security checklist covering DNSSEC, CAA, SPF/DKIM/DMARC, zone transfers and nameserver hygiene — with commands you can run today.
Domains & DNSJul 19, 2026 · 5 min read
How to catch an expiring domain: drop-catching & backorders explained
What really happens when a domain expires, how drop-catching works, and when to use a backorder vs your own registrar — a practical guide to catching the names you want.
Domains & DNSJul 8, 2026 · 4 min read
Complete DNS record guide: A, AAAA, CNAME, MX, TXT, NS & CAA
A practitioner's reference to the core DNS record types — A, AAAA, CNAME, MX, TXT, NS and CAA — with a real example and the standards behind each.
Domains & DNSJul 2, 2026 · 5 min read
How DNS resolution works: the root-to-authoritative walk explained
A practical walkthrough of DNS resolution: recursive vs authoritative resolvers, the root→TLD→authoritative query path, and how caching affects speed.
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