What is a CDN?
A CDN (Content Delivery Network) is a geographically distributed network of servers that deliver static content from the closest server to the user.
Benefits
Reduces latency, improves Core Web Vitals, protects against DDoS attacks, and reduces origin server load.
Basic configuration
Connect your domain to the CDN, configure CNAME records, and define what content to cache: images, CSS, JS, fonts.
Cache strategies
TTL (Time To Live)
Define how long content stays in cache. Static files: 1 year. HTML: 10 minutes.
Purge
Invalidate cache when you update content. Purge by specific URL or by tag.
Recommended CDNs
Cloudflare (powerful free tier), Fastly (high performance), AWS CloudFront (AWS integration), Bunny.net (good value).
Security with CDN
WAF, DDoS protection, SSL/TLS edge termination, and IP restrictions.
Conclusion
A well-configured CDN is the most effective way to speed up a global website. At Vynta we configure and optimize CDNs for maximum performance and security.