Real-world scenario
Security pushes back on a wildcard S3 permission. You craft an IAM policy that only allows s3:PutObject on the ETL bucket.
By the end you can:
Follow the request/data flow through the architecture.
Work through each concept and mark it understood. This unlocks the knowledge check.
Identity & Access Management — who (principals) can do what (actions) on which resources.
Why it matters
It is the foundation of all AWS security.
When to use it
Always. Grant least privilege, use roles over long-lived keys, enable MFA.
Example
{
"Effect": "Allow",
"Action": ["s3:GetObject"],
"Resource": "arn:aws:s3:::reports-bucket/finance/*"
}Gotcha (exam trap)
Never use the root account day-to-day, and avoid wildcards (Action:"*", Resource:"*") in production policies.
Finish the walkthrough above to unlock the check.
Use the simulated AWS console below to complete each mission step. No real AWS account is required.
Create an IAM policy named "ETLPutOnly" that allows s3:PutObject on arn:aws:s3:::etl-exports-bleepx/*.
Attach the "ETLPutOnly" policy to the "etl-uploader" user.
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