An employee connects from home, a contractor needs to administer a business application, and an executive accesses sensitive data from a hotel. Behind these ordinary situations lies a structural decision: VPN or Zero Trust access? The issue is not just about choosing a remote access technology. It determines the actual scope of your attack surface, your teams' ability to work without excessive friction, and the continuity of your operations in the event of an incident.
VPN remains a useful solution in many environments. But it was designed according to network access logic that does not always meet the requirements of hybrid organizations, cloud-based and heavily exposed to identity threats. Zero Trust access provides a more refined answer, provided it is deployed methodically and not reduced to a simple tool.
VPN or Zero Trust access: two different approaches
A VPN creates an encrypted tunnel between the user and the company network. Once authenticated, the user can typically reach a more or less large portion of internal resources, depending on firewall rules, access groups, and segmentation in place. Encryption protects exchanges over an untrusted network. It is an essential function, but it does not automatically limit the rights granted after connection.
Zero Trust access, often implemented via a ZTNA solution, reverses this approach. Instead of granting network access and then controlling movements, it authorizes a specific user to access a specific application. The decision is based on identity, multifactor authentication, device state, risk level, location, or even the time of the request. Each access must be justified and verified.
This difference is decisive. With a poorly segmented VPN, a compromised account can provide an entry point to multiple servers, shares, or administration interfaces. With a well-configured Zero Trust approach, that same account should only access resources necessary for its mission, without visibility to the rest of the network.
Zero Trust is not an isolated product
Zero Trust refers to a security model, not a single license. It involves rigorous identity management, least privilege policies, device visibility, and continuous monitoring. An unpatched device, an unmanaged personal terminal, or authentication deemed suspicious must be able to trigger a restriction, additional verification, or access denial.
This is why deploying a ZTNA gateway without reviewing existing rights does not produce the expected benefits. The technology enforces the rules. It cannot, by itself, correct overly privileged accounts or applications that no one truly owns.
Where VPN remains relevant
Opposing VPN and Zero Trust as if one must be eliminated in favor of the other would be an error. VPN is often suitable for site-to-site connections, temporary uses, or certain legacy applications that require particular network access. It can also meet a specific need when resources are limited, user profiles are stable, and segmentation is already mature.
Its deployment is generally more straightforward for known environments. IT teams often have internal expertise, and many security devices integrate proven VPN functions. For connecting two offices or enabling supervised maintenance, this simplicity can be a real operational advantage.
The caution point concerns the progressive expansion of uses. A VPN originally deployed for a few administrators sometimes becomes the access method for all employees, contractors, and mobile devices. Rules accumulate, exceptions multiply, and visibility over actual access decreases. The risk does not come from the VPN itself, but from overly broad rights and insufficient control after connection.
Multifactor authentication greatly reduces the risk of password theft. However, it does not replace network segmentation or device state control. A legitimate user connected from an infected device remains a legitimate risk to address.
When Zero Trust access provides a clear advantage
Zero Trust access becomes particularly relevant when applications and users are no longer behind a single perimeter. Microsoft 365, SaaS applications, cloud-hosted resources, external partners, and hybrid work require controls centered on identity rather than IP address alone.
It also limits the exposure of internal applications. Rather than making a portal visible on the Internet or accessible to every VPN user, the company publishes only the required service to the authorized user. This reduction in visibility complicates recognition by an attacker and limits lateral movement possibilities after a compromise.
For an SMB or mid-sized company, the business benefit is concrete: employees access their tools without receiving implicit access to the complete network. Contractors can work on a defined application, for a set duration, with exploitable audit trails. IT teams gain precision when they need to respond to an alert or analyze abnormal behavior.
This does not mean that user experience is always better by default. An overly strict policy can block critical business processes, particularly for legacy applications, technical workflows, or field teams. Security must therefore be adjusted to the risk level and real constraints of each use case.
Choose based on access, not on habits
The right decision begins with simple mapping: who accesses what, from what type of device, and for what reason? This analysis often reveals that not all VPN users need network access. They need a specific application, folder, or service.
Zero Trust access should be prioritized for hybrid employees, partners, critical application access, and environments where identities are a frequent target. It is also indicated when an organization wants to reduce dependence on IP addresses, complex network rules, and permanent access.
VPN can be maintained for site-to-site connections, certain administration tools, or applications incompatible with application publishing. In that case, it must be strengthened: multifactor authentication, strict segmentation, group-based access, centralized logging, device controls, and regular review of authorized accounts.
Most organizations should not abruptly switch. Controlled coexistence is often safer. Start with applications accessible to partners or remote employees, then gradually reduce the broadest VPN authorizations. This approach avoids weakening production while delivering measurable security gains.
Deploying a Zero Trust approach without creating disruption
The first step is to inventory applications and their dependencies. A business application may call a database, an authentication service, or a file share. If these flows are not identified, an overly restrictive policy will cause difficult-to-diagnose incidents.
Next, define access profiles based on functions, not individuals. A finance manager, a support technician, and a contractor do not need the same rights, even if they work on the same project. Rights must be limited, time-bound where possible, and reviewed when there is a job change or contract update.
Terminal security is equally critical. Conditional access gains value if the company understands the device protection level: patches applied, encryption enabled, detection and response solution operational, no known compromise. Without this visibility, identity alone is insufficient to establish trust.
Finally, monitor access decisions and prepare an exception process. An alert on unusual connection, privilege escalation, or non-compliant device must trigger a clear action. Support from a cybersecurity partner like SentriCorp helps align these policies with business needs, endpoint protection, firewalls, and incident response, rather than managing each control in isolation.
The right access model is one that reduces privileges without slowing down the teams that drive the business forward. For each connection request, ask a simple question: does this person need the network, or only this resource, at this precise moment? This discipline transforms remote access into active defense control rather than a door left open by habit.