RBAC (Role-Based Access Control) Implementation

RBAC (Role-Based Access Control) Implementation | by Peace Dennis | in InfoSec Write-ups - Freedium Milestone: 20GB Reached We’ve reached 20GB of stored data — thank you for helping us grow! Patreon Ko-fi Liberapay Close < Go to the original RBAC (Role-Based Access Control) Implementation Let's dive deep into Role-Based Access Control (RBAC). This post will remind you again why the Principle of Least Privilege is more than… Peace Dennis Follow InfoSec Write-ups · ~3 min read · April 4, 2026 (Updated: April 4, 2026) · Free: Yes Let's dive deep into Role-Based Access Control (RBAC). This post will remind you again why the Principle of Least Privilege is more than just a security buzzword. You will see that it's one of those foundational practices that truly keep your cloud environment safe and sane. Here's how I like to think of it: RBAC is like having a super-smart doorman for your cloud. Instead of giving everyone a master key, you give them only the key to the specific door they need for their job, nothing more, nothing less. That one simple rule can prevent small mistakes from turning into big security problems. Now, both Amazon Web Services (AWS) (through IAM) and Microsoft Azure (through Entra ID) use RBAC, but they do it in slightly different ways. 🔹 In AWS (IAM): You assign policies (like detailed rulebooks) to users, groups, or roles. It's very precise and lets you fine-tune permissions to the smallest detail. 🔹 In Azure (Entra ID): You assign roles (like "Contributor" or "Reader") at different scopes, from an entire subscription down to a single resource group. It's structured and organized, and it fits perfectly into a multi-cloud setup. To really understand it, here are two hands-on labs to demonstrate different scenarios. 🧩 Scenario 1: Azure Entra ID — Giving a Contractor Limited Access Picture this: a contractor named Sarah joins a project and only needs access to one resource group, not billing, not production, nothing else. So, I assigned her the Contributor role only to that resource group. To take it further, Privileged Identity Management (PIM) was used to make her access temporary and active only when she actually needs it. Simple, secure, and smart! Created the new user named Sarah The resource group The resource group role assignment Now logged in as Sarah Sarah has no access outside her assigned role 🧩 Scenario 2: AWS IAM — DevOps Engineer Access (Dev Only) Then there's Carlos, a DevOps engineer who needs to manage EC2 instances in the development environment but should have zero access to production. I created a custom IAM policy that lets him manage EC2 in us-west-2 (dev) but blocks him in us-east-1 (prod). I even added permission boundaries to prevent privilege escalation. So, if he tries to spin up or shut down anything in prod, AWS simply says "nope!" 🚫 Created the new user named Carlos who is a DevOps Engineer The DevOps Development group The custom policy Carlos launched an instance in us-west-2 Carlos has no authorization outside of us-west-2 Working through these scenarios shows that RBAC is a thoughtful process that helps you: ✅ Protect sensitive resources ✅ Prevent privilege creep ✅ Keep your environment organized and compliant Getting RBAC right is one of the smartest things you can do to build a secure and well-managed cloud environment. If you find this useful, let me know in the comments , give it a clap , and follow for more cloud security content. #rbac-access-control #least-privilege #aws-iam #microsoft-entra-id #rbac Reporting a Problem Sometimes we have problems displaying some Medium posts. If you have a problem that some images aren't loading - try using VPN. Probably you have problem with access to Medium CDN (or fucking Cloudflare's bot detection algorithms are blocking you).