Most school filters use or URL categorization . They maintain a blacklist of domains like:

The search for a is a testament to human creativity—turning a corporate CDN (Amazon CloudFront) into a rebellious gaming proxy. Yes, these links work. Yes, they bypass firewalls. But they are volatile, legally grey, and potentially dangerous.

Coolmath Games has explicitly worked with schools to be whitelisted. Their .com domain is often allowed because they focus on logic and math puzzles.

Game creators upload their HTML5 games to a CloudFront distribution and share the direct link. Because the domain ends in cloudfront.net (a trusted AWS service), the firewall assumes it is safe and lets it through.