AWS Route 53 IP-Based Routing Policy

In this lesson, we explored the IP-Based Routing Policy in AWS Route 53, which routes traffic based on the client's IP address or CIDR block. This allows for optimized performance and cost reduction by directing specific IP ranges to designated endpoints.

1. What is IP-Based Routing?

• Routes traffic based on client IP addresses or CIDR blocks.
• Allows for fine-grained control over where users are directed.
• Similar to Geolocation Routing, but instead of location, it considers specific IP ranges.

Use Cases:

✅ Performance Optimization – Route users efficiently based on known IP ranges.

✅ Cost Reduction – Avoid expensive network paths by directing traffic based on known ISP IPs.

✅ Custom Routing Strategies – Direct corporate traffic, ISP-specific users, or known client groups to specific servers.

2. Configuring IP-Based Routing in Route 53

Step 1: Define CIDR Blocks

In Route 53, define IP CIDR ranges for different groups of users.

• Example CIDRs:
  • 203.0.113.0/24 → Location 1
  • 200.0.112.0/24 → Location 2

Step 2: Create DNS Records with IP-Based Routing

1. Go to the Route 53 Console and create a new record.
2. Set the record name (e.g., example.com).
3. Select "IP-Based Routing" as the Routing Policy.