DNS Configuration
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Technical guides for setting up and managing DNS records, from basic A records to advanced configurations.
Dành cho: Developers and system administrators
Setting Up DNS for Your Domain
A complete walkthrough for setting up DNS records on a new domain — A, CNAME, MX, TXT and more — with clear practical steps for developers and site owners.
5 phút đọcA Record vs CNAME: When to Use Each
Understand when to use a DNS A record vs a CNAME — the right choice for each scenario, performance trade-offs, and why CNAME at the root domain causes problems.
4 phút đọcMX Records: Setting Up Email for Your Domain
Configure MX records to route email — covers priority, fallback servers, and step-by-step setup for Google Workspace, Microsoft 365, and custom mail servers.
4 phút đọcTXT Records: SPF, DKIM, and DMARC Explained
Set up SPF, DKIM, and DMARC TXT records to protect your domain from email spoofing and improve deliverability. Step-by-step DNS instructions included.
4 phút đọcUnderstanding DNS Propagation
Learn why DNS changes take time to propagate globally, how TTL controls propagation speed, and tools to monitor DNS record updates from multiple global resolvers.
4 phút đọcPointing Your Domain to Web Hosting
How to point your domain name to web hosting — shared hosting, VPS, WordPress hosts, and services like Vercel or Netlify — with DNS record instructions.
4 phút đọcCAA Records: Controlling SSL Certificate Issuance
CAA records restrict which CAs may issue SSL certs for your domain. Use issue, issuewild, and iodef tags to lock down issuance and prevent certificate fraud.
3 phút đọcSRV Records Explained
SRV records encode service, protocol, port, and priority into DNS. Learn to configure them for SIP, XMPP, Microsoft 365, Minecraft, and application autodiscovery.
4 phút đọcWildcard DNS Records
Wildcard DNS records match any subdomain not explicitly configured. Learn how they work, when to use them, and their limitations for SSL certificates and routing.
3 phút đọcDNS TTL: Choosing the Right Value
TTL controls how long resolvers cache DNS records. Learn the right value per record type, when to pre-lower TTLs before migrations, and caching pitfalls to avoid.
4 phút đọcReverse DNS and PTR Records
Reverse DNS maps IPs to hostnames via PTR records. Learn why it matters for email deliverability and how to set PTR records at DigitalOcean, Linode, and AWS EC2.
3 phút đọcCloudflare DNS Setup Guide
How to set up Cloudflare DNS — add nameservers, configure records, choose proxy vs DNS-only mode, and enable DNSSEC for cryptographic domain verification.
4 phút đọcDNS During Domain Migration
A step-by-step guide to managing DNS during domain migrations — changing hosts, switching DNS providers, or moving nameservers — with minimal downtime.
4 phút đọcDNS Troubleshooting Guide
Fix DNS problems: stale records, email failures, unreachable sites, SSL errors, NXDOMAIN. Uses dig commands with step-by-step troubleshooting for each issue.
5 phút đọcMulti-Domain DNS Management
Best practices for managing DNS across many domains — using a single DNS provider, bulk record management, automation, and avoiding configuration drift.
5 phút đọc