1 Answers
Hey Rong,
You’re right the lecture is dated. From the documentation,
"AWS WAF is a web application firewall that lets you monitor the HTTP and HTTPS requests that are forwarded to an Amazon CloudFront distribution, an Amazon API Gateway REST API, an Application Load Balancer, or an AWS AppSync GraphQL API."
https://docs.aws.amazon.com/waf/latest/developerguide/what-is-aws-waf.html