5 intranet security best practices

Intranet security best practices help organisations protect sensitive information, prevent unauthorised access and maintain secure internal communications. From controlling access to employee information to protecting third-party integrations, the right security measures can reduce risk while keeping workplace resources accessible.

We're regularly reminded about cyber security attacks, phishing emails and protecting our personal accounts. But how often do we consider the security of the internal systems and intranet platforms that employees use every day?

While IT teams are responsible for many of the technical safeguards, wider teams also have an important role in keeping internal information secure. In this article, we've highlighted five intranet security best practices to help organisations create a safer environment for employee communication.

These considerations are particularly important for organisations supporting a mixture of office-based, remote and frontline employees, where company information may be accessed through different devices and networks.

1. Build a secure home network

With so many employees working away from traditional offices, whether they're hybrid, deskless or remote workers, secure network access is an important part of intranet security.

Employees working from home will often access their intranet software through their home Wi-Fi network, while those on the move may connect through mobile data or public Wi-Fi. These environments can introduce security risks, particularly when devices and networks aren't properly protected.

Organisations should therefore provide clear guidance on how employees can securely access their intranet and other workplace systems outside the office.

How to improve secure intranet access

• Secure home Wi-Fi networks: Encourage employees to use strong router passwords, modern Wi-Fi encryption and updated router software.
• Use strong, unique passwords: Employees should avoid reusing passwords across different systems. A password manager can help securely generate and store unique credentials.
• Enable multi-factor authentication: MFA adds an additional layer of protection by requiring employees to verify their identity through more than one method.
• Keep devices updated: Operating systems, browsers and applications should receive regular security updates to address known vulnerabilities.
• Consider Single Sign-On: SSO can simplify access to intranets and connected applications through an approved company identity provider.

Single Sign-On can also reduce the need for employees to remember multiple passwords, making it easier to access workplace tools while allowing organisations to manage authentication centrally.

2. Create intranet usage policies

In the same way that organisations establish policies for handling sensitive data and using company systems, an intranet usage policy can help employees understand how to access and share workplace information responsibly.

Data security should be everyone's responsibility, not just IT's. Clear policies help employees recognise potential risks and understand how their everyday actions contribute to protecting company information.

What should an intranet usage policy include?

• Rules for accessing the intranet through personal and company-owned devices.
• Requirements for passwords, authentication and account protection.
• Guidance on accessing company information from home or public networks.
• Responsibilities for sharing, downloading and storing sensitive documents.
• Procedures for reporting suspicious activity, phishing attempts or potential security incidents.
• Guidelines for publishing, editing and managing intranet content.

Consider how employees access your organisation's systems. For example, should every employee have an approved device to access the intranet? If employees use an app on personal devices, should additional verification be required when setting up their accounts?

These questions are especially relevant for organisations with frontline employees, who may not have dedicated company computers and often rely on mobile devices to access important workplace information.

An intranet usage policy should also outline the organisation's approach to public Wi-Fi, sensitive documents and accessing company systems outside the workplace.

Working with IT teams to establish a consistent approach can help prevent accidental data exposure, unauthorised access and avoidable security incidents.

Where supported, organisations can also use digital acknowledgements to confirm that employees have read and understood important intranet policies.

3. Restrict access

Segmenting intranet users based on their job role, department and responsibilities helps protect sensitive information from unauthorised access.

Not every employee needs access to every part of an intranet. Restricting permissions ensures that people can find the information relevant to their work without exposing confidential resources unnecessarily.

This approach is commonly known as role-based access control (RBAC), where permissions are assigned according to an employee's responsibilities within the business.

Examples of intranet access permissions

• Intranet administrators: Manage platform settings, permissions and overall intranet configuration.
• Internal communications teams: Create, edit and publish employee communications.
• HR teams: Access confidential people-related information and manage relevant employee resources.
• Department managers: Access and manage information relating to their teams and departments.
• General employees: Read company updates, access approved documents, use relevant quick links and engage with workplace content.

Intranet managers will need appropriate administrative permissions to maintain the platform and keep information up to date. However, these privileges should be limited to authorised individuals rather than everyone who contributes content.

Granting permissions to specific employee groups can also create a more relevant intranet experience, reducing unnecessary information while protecting sensitive business resources.

Access permissions should be reviewed whenever employees change departments, take on different responsibilities or leave the organisation.

4. Secure third-party integrations

Modern intranets allow organisations to integrate third-party applications, giving employees easier access to the workplace platforms and resources they use every day.

Integrations with Microsoft 365, HR systems, document management tools and other business applications can improve productivity and reduce the need to switch between multiple systems.

However, the more applications connected to an intranet, the more important it becomes to assess how information is accessed, transferred and protected.

How to protect intranet integrations

• Review provider security: Check the security standards and data protection practices of third-party application providers.
• Protect API connections: Ensure integrations use secure authentication methods and encrypted connections.
• Limit permissions: Only grant integrations access to the information and functionality they require.
• Review connected applications: Regularly assess existing integrations and remove those that are no longer needed.
• Protect sensitive information: Ensure integrations don't unintentionally expose confidential employee or business data.

Most reputable third-party applications come with their own security measures, but organisations still need to understand how these protections work alongside their intranet.

API-based integrations should use secure endpoints and appropriate permissions to prevent sensitive company or employee information from being exposed.

Adding these considerations to your intranet security checklist can help reduce avoidable vulnerabilities and protect information shared between workplace applications.

5. Choose a modern, secure intranet

Keeping workplace systems secure and ensuring employees follow security best practices can seem like a significant responsibility. However, many of these measures should already form part of your organisation's wider information security approach.

Getting IT colleagues involved when choosing a new intranet is an important starting point. They can assess whether a platform aligns with the organisation's existing authentication, data protection and security requirements.

What should you look for in a secure intranet?

• Recognised information security standards and certifications.
• Appropriate access controls and user permissions.
• Secure authentication and identity management capabilities.
• Protection for sensitive documents and employee information.
• Secure access for remote, mobile and frontline employees.
• Ongoing security maintenance and vulnerability management.
• Clearly documented data protection and security practices.

Oak Engage provides modern intranet software designed to connect employees through mobile, desktop and digital signage, supporting organisations with both desk-based and frontline workforces.

Oak's approach to information security includes recognised security standards and practices designed to support organisations managing internal communications and workplace information.

When evaluating any intranet provider, organisations should verify the current status and scope of its security certifications, including ISO 27001 and Cyber Essentials Plus where applicable.

It's also important to understand how the provider manages authentication, employee permissions, data protection and security updates over time.

Find out more about Oak Engage's approach to security .

Keeping your company intranet secure

Effective intranet security depends on a combination of technology, clear policies and employees understanding their responsibilities.

Strong authentication, appropriate access controls, secure integrations and clear intranet usage guidelines all contribute to protecting sensitive company information.

These measures become particularly important for organisations supporting a mixture of office-based, remote and frontline employees, where internal systems may be accessed through different devices and locations.

Choosing a modern, secure intranet provides a strong foundation for these practices, helping employees access the information they need while reducing unnecessary risks.