What is Azure Front Door?

Azure Front Door is a global, scalable entry-point that uses Microsoft’s worldwide edge network to create fast, secure, and highly available web applications. It combines CDN, load balancing, and WAF in a single service.

Key Features

• Global Load Balancing: Distribute traffic across multiple regions with instant failover and health probes.
• CDN Acceleration: Cache static and dynamic content at edge locations closest to your users.
• Web Application Firewall (WAF): Protect against OWASP Top 10, DDoS, and bot attacks with managed rulesets.
• SSL Offloading: Automatic certificate management and end-to-end encryption.

Architecture

Front Door operates on Layer 7 (HTTP/HTTPS) with anycast routing. Requests hit the nearest POP (Point of Presence), where WAF rules are applied, content is cached, and traffic is routed to the healthiest backend using latency-based or priority routing.

Use Cases

• Multi-region apps: Active-active deployments across continents with sub-second failover.
• API Gateway: Rate limiting, URL rewriting, and header manipulation for microservices.
• Static Sites: CDN caching for blob storage or static web apps.

Why CloudSpark?

CloudSpark architects Front Door solutions tailored to your traffic patterns — optimizing caching rules, configuring WAF policies, and implementing blue-green deployments for zero-downtime updates.