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Finding and Validating Unused Security Groups in AWS with Python and Boto3
- Unused security groups in AWS can accumulate over time and pose security risks or increase costs. This article describes how to use Python and Boto3 to identify and validate unused security groups and ensure that they are not being referenced by any other resources.
- The article walks through the code that identifies unused security groups in a given AWS region, validates them, and checks if they are referenced by any other groups.
- The code first retrieves all security groups and network interfaces in the specified region and creates a set of security groups that are in use.
- It then identifies and lists all the unused security groups in the region and checks if any other security group references it in their rules.
- The code helps to automate the process of finding unused security groups in AWS and ensure that unnecessary resources are removed. It can help reduce clutter, improve security posture, and potentially lower costs.
- The script can be further extended to add filters based on tags, VPCs, or other criteria to implement more advanced reporting or alerting when unused groups are detected.
- The article requires an AWS account, Boto3, and credentials configured either using the AWS CLI or directly using IAM roles or environment variables.
- The script can be executed by running the validate_unused_groups function.
- The script outputs whether the unused security group is referenced or not and whether it can be safely deleted.
- You can extend the script to integrate with AWS Lambda for automated, scheduled checks.
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