What is AWS WAF?

AWS WAF (Web Application Firewall) is a web application firewall service that helps protect web applications from common web exploits and bots that may affect availability, compromise security, or consume excessive resources. It allows you to control access to your content by defining customizable web security rules. These rules can filter malicious traffic based on factors such as IP addresses, HTTP headers, HTTP body, URI strings, SQL injection, and cross-site scripting. AWS WAF can be deployed on Amazon CloudFront, Application Load Balancer (ALB), and Amazon API Gateway.