What is AWS WAF?

AWS Web Application Firewall (WAF) is a web application firewall that helps protect web applications from common web exploits and bots that could affect availability, compromise security, or consume excessive resources. WAF gives you control over which traffic to allow or block by defining customizable web security rules. It protects against common attack patterns like SQL injection and cross-site scripting (XSS). WAF can be deployed on CloudFront, Application Load Balancer, API Gateway, and AppSync. It provides real-time metrics and detailed logging for monitoring.