DNS
SERVFAIL vs NXDOMAIN: Reading Resolver Errors and Fixing Them Fast
Quickly diagnose and fix DNS resolution failures. Understand the difference between SERVFAIL and NXDOMAIN—use our systematic runbook for effective troubleshooting.
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DNS
Negative Caching (NXDOMAIN) 101: Using NSEC & TTLs to Your Advantage
Optimize DNS performance and security by understanding negative caching (NXDOMAIN) and TTLs—learn about NSEC, NSEC3, and practical configuration.
Privacy & Security
Encrypted ClientHello (ECH) for Domain Owners: What It Takes to Hide Your SNI
Stop SNI leakage with Encrypted ClientHello (ECH)—a guide for domain owners on TLS 1.3 support, DNS configuration, CDN status, and testing.
DNS
When DNS Providers Throttle You: Rate Limits, Overuse, and Hidden Performance Penalties
DNS providers use rate limits to manage overload. Learn how throttling works, why it affects performance, and how to reduce hidden DNS penalties.
DNS
The DNS Fingerprint Effect: How Resolvers Shape Your Domain’s Reputation Signals
Learn how DNS resolver behaviour influences your domain’s reputation through stability signals, timing patterns, and global DNS fingerprints.
DNS
Why Redirect Hops Become DNS Multipliers: Understanding Multi-Step Resolution Costs
Redirect chains trigger extra DNS queries that slow your site. Learn how multi-step resolution works and how to reduce DNS lookup inflation.
DNS
DNS Lookup Inflation: How Third-Party Scripts Quietly Consume Your Speed Budget
Third-party scripts silently trigger extra DNS lookups that slow your site. Learn how lookup inflation works and how to reduce its impact.
DNS
Resolver Roulette: Why Different Mobile ISPs Return Different DNS Answers
Mobile networks often return different DNS answers due to routing, caching, and resolver inconsistencies. Learn why resolver roulette occurs and how to fix its impact.
DNS
The Physics of Resolution Distance: Why Your DNS Location Still Matters in 2026
Learn why resolver distance still affects DNS speed, mobile UX, and SEO in 2026, and how Anycast networks reduce global latency.
DNS
DNS Memory Leaks: When Old Records Break Modern Browser Behaviour
Learn how DNS memory leaks form, why stale DNS data breaks modern browser behaviour, and how to detect and eliminate outdated DNS records.
Websites & Hosting
CNAME Bloat: The Hidden Chain Reaction Slowing Your Entire Site
Discover how CNAME chain reactions slow DNS resolution, hurt Core Web Vitals, and weaken SEO performance, plus how to detect and fix CNAME bloat
Websites & Hosting
What Happens When Googlebot Encounters Slow DNS? Inside the Crawl Budget Penalty
Slow DNS harms crawl budgets, delays indexing, and reduces search visibility. Learn how Googlebot reacts to DNS latency and how to fix crawl bottlenecks.