DNS Configuration Checklist
Essential verification points for a robust DNS configuration.
DNS is the foundation of your web presence. A misconfiguration can make your site unreachable for hours or even days.
This checklist helps you verify all critical aspects of your DNS configuration.
Use it for initial setup, migration, or to audit your existing configuration.
Essential Records
Records that must be present and correctly configured:
- Enregistrement A pour le domaine racine (apex)
- Enregistrement A ou CNAME pour www
- Enregistrements AAAA si IPv6 supporté
- Enregistrement NS correct vers vos serveurs DNS
- TTL approprié (300s pour dev, 3600s+ pour prod stable)
Configuration Email
Enregistrements pour l'email :
- Enregistrement MX avec priorités correctes
- Enregistrement SPF (TXT) pour autoriser vos serveurs
- Enregistrement DKIM pour signer vos emails
- Enregistrement DMARC pour la politique de rejet
DNS Security
Records improving security and deliverability:
- Activer DNSSEC si supporté par votre registrar
- Configurer l'enregistrement CAA pour les certificats
- Utiliser un DNS secondaire pour la redondance
- Activer le verrouillage de transfert de domaine
Monitoring DNS
Surveiller votre configuration :
- Monitorer la résolution DNS depuis plusieurs régions
- Alerter sur les changements d'enregistrements
- Surveiller l'expiration du domaine
- Vérifier régulièrement la propagation
Frequently Asked Questions
How long does DNS propagation take?
Typically 15 minutes to 48 hours depending on TTL and DNS providers. Low TTL before migration speeds this up.
My DNS is correct but my site is inaccessible?
Check local cache (flush DNS), verify server is actually reachable at the configured IP.
How do I test my DNS configuration?
Tools like dig, nslookup, or online services like DNSChecker.org allow complete verification.
Can MoniTao monitor my DNS?
Yes, MoniTao verifies your DNS records regularly and alerts you of any unexpected changes.
Solid DNS Foundation
A well-configured DNS is the foundation of a reliable and secure web service. Take time to verify each point.
MoniTao monitors your DNS continuously and alerts you immediately in case of detected problems.
Useful Links
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