What is the main difference between AWS NACL and Security Groups?

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kvdevika · Answer 1 · 2024-07-01T01:57:16+0000

AWS NACL (Network Access Control List): Operates at the subnet level and acts as a firewall for controlling traffic in and out of one or more subnets. It uses rules that are evaluated in numerical order, and each rule consists of a combination of IP address ranges and protocols.
Security Groups: Act as virtual firewalls for your instances, controlling inbound and outbound traffic at the instance level. They are stateful, meaning if you allow an inbound request, the corresponding outbound response is automatically allowed, and vice versa.