Key Points
- Since protocols alone don’t reflect security, usability, or operational requirements, choose VPN types based on how access is used and deployed in real environments.
- Remote access VPNs connect individual users to internal systems from outside the network perimeter. This makes them the standard choice for remote and hybrid work environments.
- Site-to-site VPNs connect entire networks rather than users, allowing branch locations to communicate and share resources as a single private network.
- Client-based and clientless VPN models affect how much of the network users can reach, how much control exists over endpoints, and how usable the connection feels.
- Always-on VPN automatically establishes connections when a managed device is online, enforcing a consistent security posture but increasing dependency on VPN infrastructure availability and resilience.
- Cloud and hybrid environments reduce reliance on network-level VPN tunnels, with identity-based and application-specific access often supplementing or replacing traditional VPN connectivity.
Choosing the right VPN types depends on how and where access is used, not just on the protocols that build the tunnel. Real-world access scenarios vary widely. A remote employee connecting from home has very different needs than two office networks that must stay connected at all times.
Looking at VPN types as deployment models rather than tunnel mechanics makes it easier to choose solutions that match access patterns, security requirements, and operational complexity.
Understand remote access VPNs
A remote access Virtual Private Network (VPN) allows users to securely connect to internal systems from outside the network perimeter. It’s widely used in remote and hybrid work environments where employees must reach private company resources from any location.
The VPN establishes an encrypted tunnel between the user’s device and the internal network, protecting data in transit. Here’s how it works:
- The organization sets up a VPN service or gateway to accept remote connections.
- The user opens a VPN application or connects automatically if “always-on” access is enabled.
- The user signs in using a password, multi-factor authentication (MFA), or a device or user certificate.
- After authentication, the VPN creates an encrypted tunnel to protect data as it travels between the user and the network.
- The user can then access approved internal applications, files, or systems.
- The connection ends when the user disconnects or when policy conditions are no longer met.
Endpoint posture checks
Access decisions are not based solely on identity. Many remote access VPNs factor in the posture of the connecting device before granting network access.
What is checked?
OS version, disk encryption status, antivirus or EDR presence, certificate availability, and device enrollment through mobile device management (MDM).
What happens to devices that fail posture validation?
Devices that don’t meet posture requirements may be blocked or restricted to limited resources.
Understand site-to-site VPNs
Site-to-site VPNs, on the other hand, are designed to connect entire networks rather than individual users. While remote access VPNs support people working from outside the office, site-to-site VPNs keep multiple locations linked at all times.
This allows branch offices, data centers, and cloud environments to operate as if they were part of a single internal network. Here’s how it works:
- Each location is set up with a VPN gateway (usually a router or firewall).
- These gateways negotiate encryption parameters and authentication methods.
- The gateways authenticate each other to establish trust.
- Once trust is established, an encrypted tunnel is created between the sites. This tunnel stays active at all times.
- All traffic moving between the networks travels through this encrypted tunnel, keeping data protected while it’s in transit.
Client-based vs clientless VPN model
VPNs are commonly deployed using either a client-based or clientless model. The table below compares how each model differs in connection method, access scope, and management requirements.
Aspects | Client-based VPNs | Clientless VPNs |
| Do users need to install software? | Yes. Dedicated VPN software must be installed on the device. | No. Access is provided through a secure browser session. |
| How is the connection established? | An encrypted tunnel is created from the endpoint to the internal network. | A browser-based session connects users to specific resources. |
| How much network access is provided? | Typically, broad or full network access, based on policy | Limited to specific applications or services. |
| What security controls are supported? | Supports device posture checks and always-on VPN enforcement. | Limited endpoint-level control due to the lack of client software. |
| How much setup and management is required? | Requires client deployment and ongoing endpoint management. | Requires minimal configuration and no client management. |
| When is this model typically used? | For organization-owned and managed devices. | For unmanaged, shared, or temporary devices. |
Client-based and clientless VPNs offer very different access experiences. Choosing the right model is important as it determines how much access users receive, how much control the organization has over their devices, and the overall usability of the connection.
Always-on VPN models
Always-on VPNs establish a secure connection automatically when a managed device comes online. Users don’t need to initiate the connection, as access is enforced through policy.
This approach reduces reliance on user behavior and keeps traffic protected by default. Always-on VPNs are best suited for devices the organization owns and manages, particularly in environments where continuous protection and compliance are required.
Cloud and hybrid access patterns
Modern IT environments rely more on cloud-native applications and identity-based access models. As a result, access is no longer tied solely to network location, reducing dependence on traditional network-level VPN tunnels.
In these cases, conventional VPNs are often supplemented or entirely replaced by cloud access solutions that provide more direct, application-specific connectivity.
Additional considerations
When selecting and implementing a VPN, several practical factors can influence how well the solution aligns with access requirements and operational expectations.
VPN performance depends on routing and split tunneling decisions
VPN performance is largely shaped by how traffic is routed. Forcing all traffic through the VPN can introduce latency, bandwidth constraints, and slower access to cloud services.
Split tunneling can improve performance by allowing non-sensitive traffic to bypass the VPN, but it must be applied carefully to avoid security gaps.
Identity integration influences access control effectiveness
VPN access depends heavily on identity systems. Integrations with modern identity providers, such as SSO and MFA, allow more precise access control and policy enforcement. This makes it easier to grant access under the right conditions without overexposing internal resources.
User experience impacts adoption and compliance
VPNs that are slow, unreliable, or difficult to use often lead to workarounds and reduced compliance. Predictable performance, fewer manual steps, and streamlined authentication improve adoption and help keep users on the intended access path.
VPNs are not a replacement for endpoint security
VPNs protect traffic in transit but don’t secure the device itself. Endpoints still require up-to-date operating systems, endpoint detection and response (EDR), and other security controls to reduce overall risk.
Troubleshooting
Here are common VPN issues that arise when access models or deployment choices don’t align with real-world usage, along with how to address them.
Slow performance
Lag or reduced throughput is often related to how traffic is routed. Review the VPN type and determine whether all traffic is forced through the tunnel or if split tunneling is configured appropriately.
Access too broad
If users have more visibility or permissions than intended, revisit the deployment model and access scope. Confirm whether the VPN grants full network access or application-specific access, and adjust policies to follow the principle of least privilege.
User confusion
Complex or inconsistent VPN workflows increase user error and reduce compliance. Simplifying connection behavior, reducing manual steps, or adopting always-on models can create a more predictable experience.
Scaling issues
When VPN performance degrades under load, the issue is usually architectural. Reassess gateway capacity, authentication dependencies, and overall VPN layout to ensure the design can support current and future demand.
NinjaOne integration
NinjaOne supports teams managing devices across different VPN models. Here’s how:
NinjaOne capability | How it helps |
| Endpoint visibility | Provides insight into device state and connectivity behavior across endpoints using different VPN models |
| Device posture monitoring | Helps identify whether endpoints meet security requirements that influence VPN access decisions |
| Endpoint management | Supports consistent configuration and policy enforcement for managed devices using VPN-based access |
| Centralized monitoring | Simplifies oversight by consolidating endpoint health, security posture, and connectivity signals in one view |
Aligning modern access needs with the right VPN types
VPN types are best understood by how they are deployed and the access scenarios they are designed to support. Choosing the right model reduces unnecessary friction, improves security alignment, and supports scalable access as environments evolve.
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