> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/appsec-rules/iac-security/public-exposure/appsec2-aws-1.md).

# AWS Network ACL is not in use misconfiguration detected in code

## Rule Details

|                        |                                      |
| ---------------------- | ------------------------------------ |
| Cortex AppSec Rule ID  | APPSEC2\_AWS\_1                      |
| Category - Subcategory | Public Exposure - Ingress Controls   |
| Provider               | AWS                                  |
| Severity               | LOW                                  |
| Framework              | Terraform, Terraform Plan            |
| Mapped CSPM/KSPM Rule  | 96e722ed-6d1d-4144-a997-81be0f6d5b18 |

## Impact

Network Access Control Lists (NACLs) are used to allow or deny traffic to and from subnets in a Virtual Private Cloud (VPC) in Amazon Web Services (AWS). It's important to ensure that all NACLs are attached to subnets because this allows you to set specific rules for controlling inbound and outbound traffic for those subnets. This can help to improve the security and connectivity of your VPC by allowing you to specify which traffic is allowed to enter or leave your subnets.

## How to Fix

*Resource:* aws\_vpc, aws\_network\_acl, aws\_subne

* *Arguments:* s\_\_ubnet\_ids\_\_ of aws\_network\_acl { "

## \[source,go]

resource "aws\_vpc" "ok\_vpc" { cidr\_block = "10.0.0.0/16" }

resource "aws\_subnet" "main" { vpc\_id = aws\_vpc.ok\_vpc.id cidr\_block = "10.0.1.0/24" }

resource "aws\_subnet" "main" { cidr\_block = "10.0.1.0/24" }

resource "aws\_network\_acl" "acl\_ok" { vpc\_id = aws\_vpc.ok\_vpc.id subnet\_ids = \[aws\_subnet.main.id] }

## ", }


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