<ul><li>AWS Security Groups and NACLs are compared in terms of their features, scope, and behavior.</li><li>Security Groups are virtual firewalls that control traffic at the instance level, while NACLs control traffic at the subnet level.</li><li>Security Groups are stateful, support inbound and outbound rules, and have a limited scope. NACLs are stateless, have numbered rules evaluated in order, and apply to all resources within a subnet.</li><li>Security Groups are best for resource-specific control, while NACLs are suitable for network-wide rules enforcement.</li></ul>

AWS Security Group vs NACL: What’s the Difference?

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