How to Implement Access Control: Steps and Practices
Gregg Davis10 min read
Access control is one of the most important security measures your IT team can implement. Whether you’re managing a cloud environment, on-premise infrastructure, or hybrid systems, you need to control who can access what company resources.
Without a solid access control system, you’re leaving doors wide open to internal and external threats. Sensitive data may get compromised, which can have legal and financial implications for your business.
In this guide, we’ll walk you through the steps of implementing strict access controls. We’ll also share best practices, such as implementing automated user provisioning, to help you save time without compromising security.
What Is Access Control?
Access control is the process of determining who can access data, applications, and company systems. It’s all about giving the right people the correct level of permissions at the right time.
A robust access control system lets you manage user access based on roles, departments, or specific business needs.
For example, only authorized individuals with the “system administrator” role can use IT management tools. Meanwhile, employees who belong to the human resources department can access the HR tech stack and payroll data.
When done right, access control helps you protect sensitive data, mitigate security risks, and maintain data confidentiality.
Without it, anyone could access systems they shouldn’t, even by mistake. That puts your business at risk.
Security threats can leak sensitive data or install malware. Compliance is also compromised, which means you might fail an audit and pay fines.
Types of Access Control Models
Here are the different models you can use to manage access control:
Role-Based Access Control (RBAC)
As its name suggests, role-based access control assigns access based on job roles.
Instead of assigning permissions one by one, this model lets you group access policies by role.
For example, if you work in IT, you can use software license management tools and other IT management systems.
On the other hand, HR staff can access employee records and human resources management (HRM) software like Deel.
Pros:
- RBAC scales well with growing teams
- This model is easier to audit and review
- It aligns with your organizational structure
Cons:
- This model becomes rigid if you don’t clearly define roles
- RBAC is not ideal for unique and just-in-time (JIT) access scenarios, such as onboarding vendors
Attribute-Based Access Control (ABAC)
ABAC relies on user attributes, such as department, job title, or location, to determine access permissions. It’s more flexible than RBAC and supports complex access policies.
For example, you can only grant access if the user has a “sales” role and is located in the United States.
Pros:
- ABAC supports fine-grained access control by considering multiple user attributes beyond an individual’s role
- This model is highly flexible, allowing you to adjust permissions based on real-time attributes
- Attribute-based access control offers stronger security than RBAC
Cons:
- It is more complex to configure and maintain access control policies
- This model requires detailed attribute management
Discretionary Access Control (DAC)
Discretionary access control puts the power in the hands of the resource owner.
You decide who can see your files and systems. You can also deny or restrict access to minimize security incidents.
Pros:
- Only resource owners can make access decisions, which can empower them and establish a sense of ownership
- DAC systems are easier to set up and manage
- In discretionary access control, you can specify exactly what authorized users can do (e.g., read, write, execute)
Cons:
- While flexible, DAC can be prone to security vulnerabilities, especially if the resource owner isn’t careful about granting permissions
- DAC makes it difficult for IT security teams to track access and control data
Mandatory Access Control (MAC)
Mandatory access control is the opposite of DAC. Instead of letting resource owners decide, this model uses the operating system to grant or deny access based on predefined security policies.
It’s up to a central authority, typically the system administrator, to manage access and security policies.
Pros:
- MAC offers a high level of security, which makes it suitable for government agencies, the military, and industries handling sensitive data
- Mandatory access control reduces human errors since the operating system (instead of a resource owner) manages access
- This model also mitigates the risk of insider threats because only users with the proper security clearance can access sensitive information
Cons:
- MAC systems lack flexibility and do not adjust quickly to changing situations and specific needs
- Configuring mandatory access control requires careful planning and technical expertise
Policy-Based Access Control (PBAC)
PBAC evaluates access requests against predefined policies. Instead of just looking at roles or attributes, it also considers other contextual factors before granting or denying access.
For example, you can allow a manager to approve expenses during business hours and only from a company laptop.
Pros:
- Policy-based access control allows for granular control and greater flexibility
- In PBAC, you can adjust access policies to adapt to changing circumstances in real time
- This model reduces admin work by automating access control through predefined policies
Cons:
- PBAC can be complex to manage, especially as your access needs grow
- If policies aren’t updated regularly, permissions might accumulate over time, which can lead to security risks
A Step-by-Step Guide to Implementing Access Control
Follow these seven steps to implement access control across your IT environment.
1. Assess Security Requirements and Risks
Start by identifying all the systems, files, and applications your company owns.
Next, classify the data they contain. This typically includes financial records, internal documents, user credentials, customer data, or anything else that could cause damage if leaked or misused.
Then, review how users interact with these systems. Look at access pattern log data to understand who can access what, when, and how often. This can help you spot abnormal behavior or unnecessary access.
You should also study past incidents. Was there a security breach? What caused it? Find gaps where unauthorized users may access sensitive information or where access wasn’t revoked on time.
By conducting a risk assessment, you gain a clearer picture of where to focus your access control mechanisms.
2. Define Access Control Objectives
Before setting up any controls, you need to be clear on your organizational goals. What do you want access control to accomplish?
Are you trying to limit lateral movement across critical systems? Do you need to improve how you manage user accounts during employee onboarding and offboarding?
Your objectives should support both effective user management and cybersecurity compliance. These should also be specific and realistic.
For example, you can grant secure access to financial data only for managers in the finance department.
During offboarding, you might want to disable access for terminated employees and send instructions for asset recovery within 30 minutes.
Clear objectives help you select the right access control solutions, design effective policies, and avoid unnecessary complexity.
3. Choose the Right Access Control Model
After defining your goals, the next step is to choose the access control model that supports them. Think about how your teams work and what data they access.
If you’re already defining user roles clearly, you might want to stick with role-based access control. It’s easy to manage, scales well, and is great for structured teams. However, RBAC can get rigid, especially when roles don’t match real-world access needs.
Attribute-based access control offers more flexibility by using attributes like network location or department. It works well in dynamic or cloud-based environments. ABAC also adds the extra security layer RBAC lacks.
However, you don’t have to choose just one. You can combine two or more access control models to apply rules dynamically.
For example, you can use RBAC for a basic structure and reinforce it with policy-based access control for advanced conditions.
4. Map User Roles and Access Rights
Once you’ve selected your access control model, it’s time to define exactly who gets access to what.
Map out every user identity in your system, such as employees, contractors, third-party vendors, and admins.
Then, group them based on roles, departments, or job functions. For example, HR staff need access to employee records, while developers need access to code repositories.
You can create detailed access control lists (ACLs) that connect each role to specific systems, files, or actions.
Make sure every permission has a reason behind it. Don’t grant more access than someone needs to protect sensitive information.
With ezOnboard, you define access rules once and they apply to every hire. Use the ROI calculator to estimate your savings.
5. Select and Deploy Access Control Technologies
You need robust access control mechanisms that fit your IT environment.
Start with identity and access management tools like Microsoft Entra ID. These platforms help enforce access rules, manage user permissions, and integrate with internal systems.
For physical security, look at access control hardware devices, such as smart cards, biometric scanners, or keypads. They can secure server rooms or restricted office areas.
Combine your software and hardware tools to create layered protection. Always test before rolling out system-wide. Your goal is to make sure only authorized users can access critical assets.
6. Enable Authentication and Authorization Mechanisms
Authentication verifies who the user is, while authorization determines what they’re allowed to do.
You need both to protect your systems from unauthorized access attempts and make sure only legitimate users can access specific resources.
Start with strong authentication. Use multi-factor authentication (MFA) to add an extra security layer beyond just a password. This could be a mobile app, security token, or biometric check. MFA can stop phishing and account takeover attacks.
On the authorization side, enforce least privilege by assigning access based on job roles and responsibilities. Use role-based rules or policy engines that support dynamic access decisions in real time.
Don’t overlook the importance of access logs. Track who accessed what, when, and from where. This helps you detect suspicious user activities, audit compliance, and troubleshoot issues quickly.
7. Review and Update Access Privileges Regularly
As users change roles, leave the company, or take on new responsibilities, their access needs change too.
It’s important to conduct regular access reviews. Check who has access to what at least once every quarter, or more often in high-risk environments.
You should also look for outdated permissions, unused accounts, or roles with excessive access.
Involve department managers in the process. They know which employees still need access to certain systems.
Best Practices for Effective Access Control
After implementing access control, you can apply the following habits to keep it strong and reliable for the long term.
Apply the Principle of Least Privilege
Give users only the access they need to do their job, and nothing more.
When you reduce unnecessary permissions, you lower the risk of internal misuse or accidental exposure.
Always default to minimal access, and add permissions based on business needs. Review access levels through regular audits, especially when someone changes roles or takes on new tasks.
Use a Centralized Identity and Access Management System
An enterprise IAM platform gives you better visibility and control across all systems. It simplifies onboarding, offboarding, and access control best practices by providing one place to manage permissions.
Choose tools that integrate with your existing apps, directories, and security tools. This helps you apply policies consistently and reduces errors from manual processes.
Document Access Control Policies and Events
Keep detailed records of your access control rules and configurations. Having complete documentation helps with troubleshooting, compliance, and training.
You should also track every significant access control event, such as policy changes, new integrations, and permission updates. This way, you always know what was changed, when, and why.
Train IT Staff
Even the strictest rules or best tools can fail if your team doesn’t understand how to use them. Train your IT employees on the systems, processes, and risks related to access control.
Teach them how to manage permissions, detect issues, and respond to incidents. Continuous training helps your staff follow procedures and handle complex setups.
Automate Access Provisioning and Deprovisioning
Manually adding and removing access wastes time and increases the chance of errors.
Use automation tools to trigger access provisioning when someone joins. These should also promptly remove permissions when employees leave.
Automated workflows reduce delays, boost accuracy, and free your IT team to focus on more important tasks.
Simplify Access Control With ezOnboard
ezOnboard connects your HR system to Active Directory and Entra ID. Once integrated, it allows you to predefine access controls based on a user’s role, department, location, or other attributes.
ezOnboard automatically grants or removes permissions in AD once human resources staff update the HR software. This automates onboarding and offboarding workflows, so your IT team can focus on strategic work.
The system can also automatically update permission rights for every lifecycle change (promotion, department transfer, relocation). This eliminates manual data entry, which can save time and reduce errors.
Schedule a demo to get started or check this ROI calculator to see your cost savings.
FAQs About How to Implement Access Control
How to implement network access control?
Start by identifying devices and users connecting to your network. Use network access control (NAC) tools to check user identity, device health, and security posture before allowing access. You can block unknown devices, segment traffic, and enforce rules that match your security policies.
How to implement data access controls?
First, classify data based on sensitivity. Next, you can assign access based on roles, departments, or user conditions. Then, use permissions, encryption, and logging to track and control access. For large environments, pair your controls with an IAM solution that enforces consistent policies across systems.
What are the two main methods of implementing access controls?
The two most common methods are role-based access control and attribute-based access control. RBAC assigns access based on job roles. On the other hand, ABAC uses attributes like department, location, or time. Both models help reduce risk by managing permissions consistently.
What is the first step in implementing access control?
The first step is to identify your security needs. Look at your data, users, systems, and possible risks. Then, perform a detailed assessment to understand who should have access and what kind. This will guide your strategy and help you choose the right tools, models, and policies for your setup.