AWS IAM Best Practices: How QuickInfra Enforces Least-Privilege Access by Default

The most common path into an AWS account isn't a sophisticated exploit — it's an over-privileged IAM credential that gets exposed. A developer commits an access key to a public GitHub repo. An EC2 instance profile has AdministratorAccess attached. A cross-account trust policy is too permissive. QuickInfra's approach to IAM is to make these mistakes structurally difficult.

No AdministratorAccess on Application Resources

Every EC2 instance QuickInfra provisions gets a dedicated IAM instance profile with only the permissions that instance actually needs. An application server that reads from S3 and writes to DynamoDB gets a policy with s3:GetObject on its specific bucket and dynamodb:PutItem on its specific table — nothing more.

QuickInfra generates these scoped policies from your project configuration. You declare what AWS services your application uses; the platform generates the minimum-permission policy.

Separating Human and Machine Identities

Human access to AWS infrastructure should go through IAM roles assumed via SSO — not through long-lived IAM user credentials. QuickInfra's documentation and templates encourage this pattern: the platform's own access uses a dedicated IAM role (not a user), and it flags IAM users with active access keys as a compliance finding.

Rotating Credentials

QuickInfra monitors IAM users with access keys older than 90 days and surfaces them in the Security section as rotation findings. For applications, rotating secrets is handled through AWS Secrets Manager integration — secrets are fetched at runtime, not baked into instance configurations.

SCPs at the Org Level

For teams using an AWS Organisation, Service Control Policies applied through Control Tower provide the guardrail layer above IAM policies. No matter how permissive an IAM policy in a workload account is, an SCP can prevent certain actions at the org level. QuickInfra's Landing Zone templates include a set of recommended SCPs: no root user API access, no disabling CloudTrail, no creating IAM users without MFA.

Auditing IAM with QuickInfra

The Security section's IAM compliance checks run against your connected accounts and flag: unused IAM users (not logged in for 90+ days), users without MFA, access keys older than 90 days, roles with wildcard permissions, and policies attached directly to users rather than to groups or roles.

Each finding links to the specific IAM entity so you can remediate directly in the AWS console.