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Understanding Domain Names and DNS

DNS Record Types Explained

A Records
Maps a domain to IPv4 addresses, directing web traffic to your server.
MX Records
Specifies mail servers responsible for receiving email messages.
CNAME Records
Creates an alias from one domain to another, useful for subdomains.
TXT Records
Holds text information, often used for domain verification and SPF records.

Domain Management Tips

  • Enable auto-renewal to prevent accidental expiration
  • Use strong registrar account security (2FA)
  • Keep contact information up to date
  • Monitor DNS changes regularly
  • Document all DNS configurations
  • Use DNSSEC for additional security

Common Domain Issues and Solutions

DNS Propagation

Changes to DNS records can take 24-48 hours to propagate globally. Plan ahead for DNS updates.

SSL Certificates

Ensure proper DNS configuration for SSL certificate validation and renewal.

Email Deliverability

Maintain proper SPF, DKIM, and DMARC records to ensure email delivery.

Security Best Practices

  • Implement DNSSEC to prevent DNS spoofing
  • Use domain privacy protection
  • Monitor for unauthorized DNS changes
  • Regular security audits
  • Keep software and systems updated
  • Use strong passwords and 2FA
  • Regular backup of DNS records
  • Document all authorized changes

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