---
title: "Discussion on \"Understanding Stateful vs Stateless Firewalls and NACLs in AWS: A Clear Guide\" | Hashnode"
description: "Discussion on \"Understanding Stateful vs Stateless Firewalls and NACLs in AWS: A Clear Guide\". A stateful firewall tracks the state of connections. When it allows traffic in one direction, it automatically allows the return traffic. It remembers the entire session. AWS Security Groups are stateful. They only use allow rules, and they do not ne..."
url: "https://hashnode.com/posts/understanding-stateful-vs-stateless-firewalls-and-nacls-in-aws-a-clear-guide/69178621c670c3960cf85661"
---

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# [Understanding Stateful vs Stateless Firewalls and NACLs in AWS: A Clear Guide](https://vannys-tech-journey.hashnode.dev/understanding-stateful-vs-stateless-firewalls-and-nacls-in-aws-a-clear-guide?utm_source=hashnode&utm_medium=feed)

A stateful firewall tracks the state of connections. When it allows traffic in one direction, it automatically allows the return traffic. It remembers the entire session. AWS Security Groups are stateful. They only use allow rules, and they do not ne...

Nov 14, 2025 · 2 min read · vannys-tech-journey.hashnode.dev  
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-   [#stateful-firewall](https://hashnode.com/tag/stateful-firewall)
-   [#aws-nacl](https://hashnode.com/tag/aws-nacl)
-   [#firewalls](https://hashnode.com/tag/firewalls)
-   [#stateless-firewall](https://hashnode.com/tag/stateless-firewall)

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