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Mandatory Access Control (MAC)

Explore how MAC works, when to use it, and how to avoid the developer bottlenecks it can create.

Mandatory Access Control (MAC) is a security framework used to manage access to system resources by enforcing policies that are centrally defined and strictly applied. Unlike discretionary models where individual users decide who gets access to what, MAC removes personal discretion from the equation. Instead, access decisions are based on clearance levels, security labels, and system-wide rules established by an administrator or security policy.

In high-stakes environments (think government systems or highly regulated industries) MAC reigns supreme. It prioritizes security over convenience, ensuring that only users with appropriate access permissions can interact with sensitive data or critical functions.

While MAC brings control, it can also bring bottlenecks. And in fast-moving SaaS environments where access requests come from everywhere, it’s often developers stuck translating those requests into technical reality. 

That’s the broken status quo. And it’s time to rewrite it.

How does MAC work?

At the heart of MAC is a rigid policy architecture. Every resource and user is tagged with a security label (also known as a classification), and every user is assigned a clearance level. The system evaluates access requests using these two factors, ensuring that access is only granted when both labels and clearances align under predefined rules.

Unlike Role-Based Access Control (RBAC), which assigns permissions based on job function, MAC looks at the relationship between object and subject labels. Even if someone has a high-level role, they won’t gain access unless their clearance explicitly matches the resource’s security classification.

A simple example

Imagine your SaaS company’s infosec team has labeled a customer data audit log as “Restricted.” According to your MAC policy, only users with “Compliance” clearance can access files with that label. A product manager, working on a new analytics feature, tries to open the log to better understand usage patterns. Despite having broad platform access and high seniority, their request is denied. 

The system enforces the policy automatically because their clearance level does not include access to Restricted data. No exceptions. No shortcuts.

That is MAC in motion. Rules are enforced by policy, not by people. While it keeps sensitive data safe, it can quickly become a chokepoint if the policies require modification.

Pros and cons of MAC

MAC isn’t a silver bullet. It’s a tradeoff, balancing control, flexibility, and the amount of admin time it consumes.

Pros

  • Tight security: With centralized control and immovable rules, MAC minimizes the risk of unauthorized access when the principle of least privilege is applied.
  • Compliance-friendly: Ideal for meeting strict regulatory requirements in government, finance, healthcare, and defense.
  • Reduces insider risk: Users can’t just share or tweak access controls. Everything is governed by a centralized system policy.

Cons

  • Rigid and inflexible: MAC can be slow to adapt to changing business needs. Every access update requires administrative intervention from the central authority.
  • Operational friction: Developers don’t control MAC policies, but they often bear the brunt of troubleshooting when access issues arise.
  • Complex setup: Implementing MAC requires careful planning of classification levels and policies. It’s not plug-and-play.

MAC vs DAC: What’s the difference?

Discretionary Access Control (DAC) lets the owner of a resource decide who gets in. That’s convenient, but risky. One misstep, like granting broader access than needed, and you’re in trouble.

MAC, on the other hand, strips that discretion away. It centralizes control to enforce rigid access rules. While DAC offers flexibility, MAC prioritizes security. In SaaS terms, DAC is a post-it note system. MAC is a digital fortress.

Choosing between MAC and DAC depends on what you’re solving for. Need agility and trust your users to make smart choices? DAC might work, especially for early-stage teams or internal systems where collaboration is key. 

But if you’re in a regulated industry, dealing with sensitive data, or managing large-scale access across complex hierarchies, MAC delivers the control and consistency you may benefit from. It’s not about which is better, it’s about what you’re willing to risk.

Best practices for using MAC in modern systems

Implementing MAC effectively, especially in dynamic environments, requires a mix of discipline, foresight, and smart tooling:

  1. Use granular security labels: More detailed labels improve precision in access decisions.
  2. Audit access requests regularly: Keep tabs on who is asking for what and why. Use this data to inform policy updates.
  3. Combine MAC with RBAC: While MAC handles the high-level security enforcement, role-based access control can provide flexibility for less sensitive areas.
  4. Avoid bottlenecking: Don’t rely on just a few admins to manage routine access changes. Instead, use tools that empower non-technical teams to operate within established MAC policies.

Where Frontegg comes in

If you’re using MAC and want to grant a new user admin privileges? Submit a ticket. Need to enforce MFA for a new customer segment? Submit a ticket. Need to update a security label? Another ticket.

Now imagine that same workflow, but without the dev bottleneck.

Frontegg lets your infosec team enforce clearance levels and security labels through a powerful admin portal. Your customer success team can respond to urgent access requests without pinging the backend team. Product can test new features using flexible access permissions without breaking compliance.

This is distributed ownership in action. Frontegg enables the implementation of robust access control models that mirror the strictness of traditional MAC systems, without overburdening developers with low-priority tickets. It’s a balance of stringent security and operational agility.

If your organization needs strong access enforcement without overloading developers, it’s time to reimagine your access control. Stop treating security and agility like enemies. Start using tools that let each team manage what matters most to them without compromising compliance.

Frontegg lets your people work smarter. And that includes your developers.