Fundamentals

Basics

Amazon Route 53 is a highly available and scalable cloud Domain Name System (DNS) web service. It provides following features

1. Register Domains
3. Hosted Zones - managed nameserers
4. Zone files in AWS
5. Hosted on four managed name servers
6. Public Hosted Zone
7. Private Hosted Zone - linked to VPCs
8. RecordSets - records within hosted zone

DNS Record Types

• Nameserver (NS)

• A and AAAA Records

  • A record maps to ipv4
  • AAAA record maps to ipv6

• CNAME Records

  • cannot point directly to other names
  • can only point to the name

• MX Records

  • important for email
  • priority and value (mail || mail.other.domain)
  • MX query

• TXT Records

  • additional text data to the record
  • Query TXT for the validation

TTL - Time To Live

• Resolver cached for TTL no. of seconds
• also non-authoriative answer