DNS & Domain Articles - Guides on DNS, SSL, WHOIS and domain management
How DNS Works: A Beginner's Guide
How DNS turns a domain name into an IP address, what each server in the chain does, why caching matters, and how to watch a lookup happen yourself.
Why Agencies and Software Companies Need Wildcard SSL
Wildcard SSL secures every subdomain with one certificate. Why agencies and SaaS teams managing many client subdomains need it, especially as cert lifetimes shrink.
What is a DKIM Record?
Learn what a DKIM record is, how cryptographic email signing works, and how to publish and verify DKIM in DNS. Covers selectors, keys, and SPF/DMARC.
DNS Changes Not Propagating? Troubleshooting Guide
DNS change not propagating? Diagnose and fix stuck updates: TTL, caching, wrong records, nameserver mismatches, and CDN proxies. A step-by-step guide.
AdGuard Review: DNS, VPN, and Ad Blocker
An honest review of AdGuard's three privacy products: DNS, VPN, and ad blocker. What each does, who it's for, real pros and cons, and which to start with.
What is 1.1.1.1? Cloudflare DNS Explained
Learn what Cloudflare DNS (1.1.1.1) is, why it's the fastest public resolver, what its privacy promises mean, and how to set it up on any device.
Website Launch DNS Checklist
A step-by-step DNS checklist for launching or migrating a website. Verify DNS, SSL, email, and security headers before going live.
What is DNS over HTTPS (DoH)?
Learn what DNS over HTTPS is, how it protects your DNS queries from snooping, and how to enable it on your browser and device.
DNS Record Cleanup Guide
Learn how to audit and clean up your DNS records. Remove unused, outdated, and dangling records to improve security.
What is DNS Cache Poisoning?
Learn what DNS cache poisoning is, how attackers exploit DNS resolvers, and practical steps to protect your domain.
How to Change DNS Nameservers
Learn how to change DNS nameservers for your domain. Step-by-step guide covering when to change, what to prepare, and how to verify propagation.
What is an SPF Record?
Learn what SPF records are, how they prevent email spoofing, and how to set one up.
What is DMARC?
Learn what DMARC is, how it works with SPF and DKIM to protect your email, and how to set up a DMARC record.
What is a SRV Record?
Learn what DNS SRV records are, how priority, weight, and port fields work, and when to use them.
What is a SOA Record?
Learn what a DNS SOA record is, what each field means, and why it matters for zone transfers and DNS management.
A Record vs CNAME: What's the Difference?
Learn the difference between DNS A records and CNAME records, when to use each, and common mistakes to avoid.
What is a Wildcard DNS Record?
Learn what a wildcard DNS record is, how it works, when to use it, and the risks to avoid.
DNS Security Best Practices
Learn the most important DNS security practices: DNSSEC, encrypted DNS, secure resolvers, email authentication, and monitoring.
How to Check SSL Certificates
Learn how to check SSL certificates for any website. See what each field means, spot common issues, and verify your certificate is working properly.
What is Quad9 DNS (9.9.9.9)?
Learn what Quad9 DNS is, how 9.9.9.9 protects you from malware and phishing, and how to set it up on any device.
What is WHOIS? Domain Lookup Explained
Learn what WHOIS is, how domain lookups work, what information they reveal, and how GDPR and RDAP have changed domain privacy.
How to Read HTTP Headers
Learn how to read and understand HTTP headers. Covers security headers, caching, performance, and red flags to watch for.
DNS vs Nameservers: What's the Difference?
Understand the difference between DNS and nameservers. DNS is the system, nameservers are the servers within it. Simple explanation with real-world examples.
What is a DNS NS Record?
Learn what DNS NS records are, how they work, why they matter, and what happens when they're misconfigured. Includes real-world examples.
What is a DNS TXT Record?
Learn what a DNS TXT record is, how it works, and why it matters for email security. Understand SPF, DKIM, and DMARC with clear examples.
What is a CNAME Record? (Simple Guide With Examples)
Learn what a CNAME record is, how it works, and when to use one. Understand the difference between CNAME and A records with real-world examples.
How to Check Domain Age (3 Easy Methods)
Learn how to check domain age using free tools, WHOIS lookup, and the Wayback Machine.
What is a DNS A Record?
Learn how A records connect domain names to IP addresses, how to set one up, and how to verify it has propagated.
DNS Not Working? 7 Ways to Fix It
Troubleshoot and fix common DNS problems quickly with seven practical steps you can run through in order.
Best Public DNS Servers (2026)
Compare the best public DNS servers for speed, privacy, and security, with the exact addresses to use.
What is an MX Record?
Learn what MX records are and how they route email to your mail server. Understand priority settings, multiple MX records, and common issues.
How to Flush DNS Cache
Step-by-step guide to clear DNS cache on Windows, Mac, Linux, and Chrome browser to fix website loading issues.
What is DNS Propagation?
A complete beginner's guide to understanding DNS propagation - why DNS changes don't happen instantly and what's going on behind the scenes.
How to Speed Up DNS Propagation
Can't wait 48 hours? Learn 6 proven methods to minimize DNS propagation time and see your changes faster.
What is DNS TTL?
Complete guide to DNS Time to Live - what TTL means, how it affects propagation, and best practices for different scenarios.
How Long Does DNS Propagation Take?
Learn why DNS changes take time to propagate globally and what factors affect the speed. Plus tips to check and speed up propagation.
How to Check DNS Propagation
Three reliable methods to check and track DNS propagation across global servers, plus how to read the results.
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