Articles & Guides
Useful resources for web developers and system administrators
Found 46 · DNS · Reset
DNS
DNS Leak: What It Is, How to Test and Fix
DNS leak on VPN — what it is, why it matters, and how to fix it. Step-by-step tests and fixes for Windows, macOS, Linux, iOS, Android.
DNS
What Is a DNS Server: Types, How to Find Yours and Fix It
What a DNS server is: how recursive, authoritative, root and TLD servers differ, how to find the one you use, change it, and fix it when it stops responding.
DNS
MX Records for Email: Step-by-Step Setup Guide
Full MX records setup for Google Workspace, Yandex 360, Zoho. Priority, RFC 5321, SPF/DKIM/DMARC, and delivery testing.
DNS
CNAME vs A Record: Differences and When to Use Each
CNAME or A record? Detailed comparison: performance, RFC 1034/1912 constraints, apex domain, CDN, and when each one is the right choice.
DNS
How to Flush DNS Cache: Windows, Mac, Linux, Browsers
Five DNS caches sit between you and an answer, and flushing one leaves four untouched. The copy actually serving you is usually the one you cannot flush.
DNS
How to Check DNS Propagation: 5 Tools and Methods
Check DNS propagation in 2026: 5 best tools, how propagation actually works, dig/nslookup commands, and how to speed it up.
DNS
DNS Not Resolving: 8 Causes and Step-by-Step Fixes
Domain not resolving? Check the local cache, your resolver, the authoritative nameservers and delegation, TTL after changes and port 53 firewalls.
DNS
DNS Records: How to Add, Check and Fix Them — Enterno.io
A practical guide to DNS records: add and edit them in any panel, get TXT right (SPF, DKIM, DMARC), verify with dig, and diagnose failures by symptom.
DNS
Anycast DNS: How It Works, Benefits and Implementation
Learn how anycast routing works for DNS. Understand the benefits for resilience, speed, and DDoS mitigation. Practical implementation guide.
DNS
How to Choose the Perfect Domain Name: A Complete Guide
Learn how to choose the right domain name for your project. TLD selection, branding tips, common mistakes to avoid, and practical recommendations.