A Network Access Control List (NACL) is a security feature in Amazon Web Services (AWS) that acts as a virtual firewall for controlling inbound and outbound traffic at the subnet level within a Virtual Private Cloud (VPC). NACLs are stateless, meaning they don’t keep track of the connection state like stateful firewalls do. They evaluate traffic based on rules that you define and allow or deny traffic accordingly.
Network Access Control Lists (NACLs) and Security Groups are both important components of network security in Amazon Web Services (AWS). They provide different levels of control and operate at different layers of the networking stack.