Latest Posts

AWS IAM:PassRole explained

A common point of confusion when getting started with AWS IAM, and when trying to implement "least privileges" on IAM is the message "is not authorized to perform: iam:PassRole on resource". Usually this refers to "User" or "CloudFormation" as

Effective Actions for AWS IAM

TL;DR I made Effective IAM Actions, a small tool to expand wildcards "*"in IAM Policy Actions so that you can see explicitly what permissions are granted by a policy. It supports multiple statements in each policy, Allow and Deny

Managing Secure String Parameters in CloudFormation

This was a nifty little trick I just learnt from my colleague James the other day that is definitely worth sharing more widely. While CloudFormation does not support SecureStrings for AWS::SSM::Parameters resources, you can can fudge it with