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Introduction
Secure remote access is no longer a choice between encrypted and unencrypted connections. Both modern VPN and Zero Trust remote access solutions can protect data in transit. The more important question is what a user or device can reach after authentication.
A VPN often extends network connectivity to a remote endpoint. Zero Trust Network Access takes a resource-centric approach, evaluating the user, device, requested application, and current context before granting access. For many organizations, the best design is not a total replacement but a deliberate division between application access and genuine network access.
What is a VPN?
A virtual private network creates an encrypted tunnel between a remote device and a VPN gateway, which authenticates the connection before routing approved traffic to private networks, subnets or services.
Although a VPN does not have to provide unrestricted access, its operating model remains network-oriented. Administrators can apply:
- multifactor authentication
- d evice certificates
- firewall rules
- network segmentation
- a ccess control lists
Yet, the endpoint will usually still receive an IP-level path to one or more internal resources.
Because this model is well established and supports a wide range of protocols, it remains useful when administrators need broad infrastructure access, applications depend on internal addressing, or two sites need to exchange traffic securely.
The main risk arises when VPN permissions extend beyond what the user actually needs. For example, a remote employee who only needs one accounting application may not need access to the entire finance subnet.
What is Zero Trust Remote Access (ZTNA)?
In common usage, Zero Trust remote access usually refers to Zero Trust Network Access, or ZTNA. ZTNA applies Zero Trust principles to remote connectivity by granting access to an individual application, desktop, or service instead of extending general network access.
The decision can consider several signals:
- User identity and role
- Device ownership and security posture
- Requested resource
- Location and time of access
- Authentication strength
- Session risk or unusual behaviour
NIST describes Zero Trust as an architecture that removes implicit trust based on network location and protects individual resources through explicit authentication and authorization. ZTNA is one way to apply that principle, not the whole Zero Trust architecture.
After a request is approved, the user receives a controlled path to the authorized resource. Unapproved systems do not need to become visible or routable from the endpoint. Policies may also trigger reauthentication, restricted access or session termination when risk changes.
Zero Trust Remote Access vs VPN: Key Differences
The difference between ZTNA and VPN is architectural rather than simply technological. A well-segmented VPN can be highly restrictive, while a poorly governed ZTNA deployment can still grant excessive access.
| Criterion | VPN | Zero Trust remote access or ZTNA |
|---|---|---|
| Access target | Network, subnet or service range | Specific application, desktop or service |
| Primary policy context | Routes, IP addresses, groups and firewall rules | Identity, device, resource and contextual signals |
| Network visibility | Internal services may become reachable after connection | Unapproved resources can remain undiscoverable |
| User workflow | Establish tunnel, then open the resource | Request or launch an approved resource directly |
| Best fit | Network-level, legacy and site-to-site access | Application-level access for users and third parties |
| Main operational trade-off | Familiar but can become broad and gateway-heavy | Granular but requires application and identity mapping |
Security model
A traditional VPN makes its main trust decision when the tunnel is established. Modern platforms can strengthen that decision with conditional access, endpoint checks and reauthentication, but the session still begins by extending network connectivity to the user.
ZTNA takes a more resource-focused approach. A valid password and second factor do not automatically provide access to every internal system, because the policy can also require a managed device, an approved location, a specific user role or a lower-risk session before making the requested application available.
This narrower access model supports least privilege and can limit the number of systems exposed if credentials are stolen. However, ZTNA does not eliminate account-compromise risk, since an attacker may still misuse any application the compromised account is authorized to open.
User experience
VPN users often need to open a client, wait for the tunnel to connect, complete authentication prompts and then launch the required application. When DNS conflicts, split-tunnelling rules, unstable local networks or expired client configurations cause problems, the result can be additional support requests.
ZTNA can simplify this process by presenting only approved resources through a portal, browser or lightweight client. Instead of first receiving general network access, the user can launch the required application directly.
The experience still depends on the implementation, as some protocols require an endpoint agent and some legacy applications do not work well through an application proxy. Before migrating, IT teams should therefore test:
- authentication
- printing
- file transfer
- · clipboard controls
- reconnection behavior
Network exposure
A VPN gateway is an internet-facing edge service, so it must be patched, monitored and protected. Depending on the routes, segmentation and firewall policy in place, a connected user may also be able to discover internal addresses or services.
ZTNA can reduce this exposure by placing a broker or enforcement point between the user and the application. This gives the endpoint access to the approved resource without creating a general route into the surrounding network.
Although this design can make lateral movement more difficult, connectors, identity providers, gateways and application servers still need to be secured. CISA guidance also treats remote access software and edge devices as high-value infrastructure that requires MFA, patching, logging and reduced exposure.
Performance
VPN designs often backhaul traffic through a central gateway or data center, which can add latency when a remote user connects through headquarters to reach a cloud-hosted application.
ZTNA may offer a more direct path to the authorized application, particularly when connectors or service points are distributed close to users and workloads. Even so, performance still depends on:
- inspection requirements
- provider architecture
- connector placement
- internet quality
A VPN can remain efficient for internal data-center workloads or environments with local concentrators. Rather than assuming one model is always faster, IT teams should compare application response times and session stability in their own environment.
Management
Network teams are already familiar with VPN concentrators, routes, firewall rules and access control lists, which can make deployment easier. Over time, however, permissions may become harder to review as groups, subnets and exceptions accumulate.
ZTNA requires a clearer inventory of users, applications, device requirements and dependencies. Administrators must define who needs each resource, which devices they can use and under what conditions access should be granted. Although this policy work takes effort, it can make access reviews more meaningful because permissions are mapped directly to business applications.
Whichever model is used, effective management depends on assigning an owner to each resource, documenting exceptions and reviewing privileges regularly. Neither VPN nor ZTNA remains secure without consistent operational discipline.
Cost
A VPN may be the less expensive option when an organization already owns compatible firewall or gateway infrastructure. However, the overall cost can still include:
- concentrator capacity
- high availability
- client support
- bandwidth
- segmentation work
- ongoing rule maintenance
ZTNA may introduce per-user subscriptions, identity integration, endpoint agents, connectors and migration work. At the same time, it can reduce VPN backhaul, simplify contractor access and lower the cost of supporting broad network connectivity.
For this reason, the comparison should focus on total cost of ownership rather than the initial product price alone. IT teams should consider licensing, infrastructure, helpdesk effort, policy administration, downtime risk and the cost of granting more access than users actually need.
When Does a VPN Still Makes Sense?
Despite the move toward more resource-specific access models, a VPN remains the right choice when users or systems genuinely need network-level connectivity.
It is especially useful when the requirement involves multiple protocols, shared infrastructure or applications that depend on direct access to internal networks.
Common examples include:
- Site-to-site connectivity between offices, data centers or cloud networks
- Network troubleshooting and packet-level administration
- Access to multiple protocols across a controlled infrastructure segment
- Legacy applications that cannot be published through an application gateway
- Development, laboratory or disaster-recovery environments that require broad connectivity
- T emporary access in environments where segmentation and monitoring are already mature
A VPN is therefore neither obsolete nor inherently insecure. Its security depends on how carefully the connection is configured and managed, including restricted routes, strong authentication, regular gateway patching and clear separation between standard users and privileged administrators.
When these controls are in place and the business need is genuinely network-oriented, a VPN can remain an effective and practical remote access solution.
When Is Zero Trust The Better Choice?
ZTNA is usually the stronger choice when users need access to a defined set of applications rather than the wider network. This makes it particularly suitable for remote employees, contractors, partners and external support teams whose access requirements can be described precisely.
For example, a Zero Trust policy might allow members of the finance group to access the accounting application during approved hours, provided they use managed devices and multifactor authentication. This type of rule is easier to review than a broad permission granting access to the finance subnet.
ZTNA is also well suited to distributed and cloud-oriented environments where applications are no longer located behind a single office perimeter. By placing identity and resource policy at the center of the access decision, the model follows the workload rather than a physical network boundary.
Is there a middle ground?
Yes. Rather than forcing every workflow through a single technology, many organizations can use ZTNA and VPN together.
Standard employees and contractors can receive application-level access through ZTNA or a secure application portal, while network administrators retain a tightly controlled VPN or privileged access gateway for tasks that require IP-level connectivity. Branch offices can continue using site-to-site VPNs, and legacy applications can remain on restricted VPN routes until they are modernized or published more narrowly .
A phased transition is usually safer than a sudden replacement. IT teams can invent remote workflows, separate application-level requirements from network-level needs, strengthen identity controls, pilot one contained application and remove the corresponding VPN route only after validating the new access path.
How Does TSplus Fits the Picture?
TSplus Advanced Security protects Windows servers and remote access environments. Rather than replacing a VPN or acting as a complete Zero Trust Network Access platform, it adds server-level controls that can strengthen either access model.
These controls can protect Windows servers behind a VPN while adding restrictions based on users, devices, locations and connection times. They support several Zero Trust principles as part of a broader security architecture.
Brute-Force and Malicious IP Protection
Internet-facing authentication services are frequent targets for password-guessing attacks and automated network scans. Our solution monitors failed Windows login attempts and can automatically blacklist the originating IP address once the configured threshold is reached.
Hacker IP Protection reinforces this defence with a maintained list of addresses associated with malware, botnets, online attacks and other malicious activity. Administrators can also manage allowed and blocked addresses through firewall rules, helping to stop unwanted traffic before it reaches an exposed Windows service.
Geographic and Contextual Access Restrictions
Geographic Protection allows administrators to control access according to the originating country or IP address. They can limit connections to approved countries, private addresses and specifically whitelisted IP ranges, which is useful when legitimate users connect from predictable locations.
Working Hours adds time-based controls for users and groups, allowing administrators to define when sessions may be opened and reduce account availability outside expected working periods. Trusted Devices can further limit connections to approved endpoints when the connection method supports device identification.
These checks resemble the contextual controls used in Zero Trust strategies. However, location, time and device information should remain supporting signals rather than definitive proof that a connection is trustworthy.
Granular Permissions and Secure Sessions
Our solution includes permission controls for reviewing and managing user and group privileges. Administrators can restrict access to files, folders, registry objects and printers on the protected Windows server.
Secure Sessions can then apply different security levels to specific users and groups. Together, these features reduce what a connected account can access or modify after authentication.
This server-level least-privilege approach can limit the impact of a compromised account. However, it is not equivalent to a ZTNA policy engine, which normally brokers access to individual applications or services before establishing network connectivity.
Ransomware Protection
Our solution monitors server activity for behaviour associated with ransomware. It combines static indicators with behavioural analysis to detect suspicious file activity and respond when potential ransomware is identified.
This protection is particularly relevant when remote users can open shared documents or write to server storage. Because a valid account can still be misused to run malicious software, securing the connection alone is not enough.
Ransomware protection should therefore complement tested offline backups, patch management, endpoint protection and incident-response procedures rather than replace them.
Firewall Controls, Events and Alerts
TSplus Advanced Security can enforce blocking rules through Windows Firewall or its integrated firewall. Administrators can block hostile addresses, maintain whitelists and review network restrictions from the Advanced Security interface.
The dashboard also displays recent security events, while configurable alerts can notify administrators by email, SMS or Microsoft Teams when selected events occur. Together, these features provide visibility into blocked connections and other activity that may require investigation.
Monitoring remains essential in both VPN and Zero Trust environments. Preventive controls can reduce risk, but IT teams must continue reviewing alerts, investigating unusual behaviour and refining policies as access requirements change.
Conclusion
The central difference between Zero Trust remote access and a VPN is the scope and timing of trust. A VPN usually creates an encrypted network path after authenticating a user or device. ZTNA grants access to a specific resource after evaluating identity, device and contextual conditions.
A VPN remains appropriate for site-to-site connections, network administration, legacy protocols and workloads that require IP-level connectivity. ZTNA is generally better suited to employees, contractors and partners who only need selected applications or services.
Many organizations will benefit from combining the two approaches. Application-level access can move toward ZTNA, while restricted VPN connections remain available for workflows that genuinely require network access. Whichever model is chosen, strong authentication, least privilege, segmentation, server hardening and continuous monitoring remain necessary.
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