Aws Route53

Common record types:

• A / AAAA: IPv4/IPv6 address or alias to AWS resource
• CNAME: canonical name (not at zone apex)
• MX: mail exchange
• TXT: verification, SPF, DKIM, DMARC
• NS: name server delegation
• SRV: service locator
• CAA: certificate authority authorization

Alias records (preferred for AWS resources):

• CloudFront distribution
• ALB/NLB/Classic LB
• S3 website endpoint
• API Gateway
• VPC interface endpoint
• Another Route 53 record
• Global Accelerator

Step 4: Configure routing policies

Simple: single resource Weighted: percentage-based traffic split (A/B testing, migrations) Latency: route to lowest latency region Failover: primary/secondary with health check Geolocation: route by continent/country/state Geoproximity: route by geographic proximity with bias Multivalue Answer: up to 8 healthy records returned

Step 5: Generate health checks

Create health checks for:

• HTTP/HTTPS endpoint (status code, string matching)
• TCP connection
• CloudWatch alarm-based
• Calculated health check (combine multiple)

Configuration:

• Check interval (10 or 30 seconds)
• Failure threshold (1-10)
• Health checker regions
• Invert health check status
• SNS notification on status change

Step 6: Generate domain registration (if needed)

• Domain registration or transfer
• Auto-renew configuration
• Privacy protection (WHOIS)
• Transfer lock

Best practices:

• Use Alias records for AWS resources (free, supports zone apex)
• Enable DNSSEC for domain validation
• Use health checks with failover routing
• Set appropriate TTL (300s default, lower for failover)
• Use CAA records to restrict certificate issuance
• Monitor with Route 53 health check CloudWatch metrics
• Use private hosted zones for internal service discovery
• Enable query logging for troubleshooting