VPN vs RDP for Remote Access: Choosing the Right Approach for Your Business

Remote access to business systems is a practical daily requirement for many UK organisations, particularly as distributed working has become more common. Two frequently discussed approaches are VPNs and RDP, but they solve different problems and are often used interchangeably when they should not be. Understanding what each technology actually does, where each one fits, and how to choose between them for your business can save time, reduce security risk, and make your IT support more manageable.

What a VPN Actually Does

A VPN, or Virtual Private Network, creates an encrypted tunnel between your device and a remote network. Once connected, your device behaves as if it is physically on that network. You can access shared drives, internal web applications, printers, and any other resource that would normally require being in the office.

The key characteristic of a VPN is that it gives your device network-level access. Everything on that network becomes reachable, whether you need it or not. This is both the strength and the risk of the approach. You gain flexibility, but your attack surface expands accordingly.

A VPN is useful when you need to access multiple systems on a remote network and you want to use your normal desktop applications, not a single remote screen. Developers working on internal services, IT staff managing servers, and employees who need simultaneous access to file shares, internal tools, and various applications all benefit from VPN access.

Typical VPN setup on a Linux server looks like this:

sudo apt update && sudo apt install openvpn easy-rsa

# Generate keys and certificates
make-cadir /etc/openvpn/easy-rsa
cd /etc/openvpn/easy-rsa
source vars
./build-key-server server

# Start the VPN service
sudo openvpn --config /etc/openvpn/server.conf

For teams working across multiple locations, a well-configured VPN can simplify how remote workers interact with internal resources. You can find more detail on practical remote work IT setup in this guide to remote work IT setup for teams.

What RDP Actually Does

RDP, or Remote Desktop Protocol, is a method for viewing and controlling a remote computer's desktop. When you connect via RDP, you see the remote machine's screen and can use its applications, files, and resources as if you were sitting in front of it.

RDP gives you application-level access. You log into one specific machine and use that machine's resources. The scope is contained, predictable, and auditable. This makes RDP easier to manage in many business scenarios, particularly where compliance and security monitoring are priorities.

Connecting via RDP from Windows is straightforward:

mstsc /v:serverhostname /u:username

From a Linux desktop, you can use Remmina or a similar client:

sudo apt install remmina remmina-plugin-rdp
remmina

Setting up a basic xrdp server on Linux allows Windows clients to connect seamlessly:

sudo apt install xrdp
sudo systemctl enable xrdp
sudo ufw allow 3389/tcp

For Windows Server environments, RDP is often the primary remote management tool. It is built into the operating system, requires minimal configuration to get started, and integrates with Active Directory for authentication.

Key Differences Between VPN and RDP

The fundamental difference is scope. A VPN makes your entire network accessible. RDP gives you one desktop. A VPN is a network solution. RDP is a workstation solution. That distinction shapes almost every other factor in the comparison.

Performance and Bandwidth

RDP compresses the display and transmits only screen changes, making it efficient even on slower connections. If you are working over a broadband connection with moderate latency, RDP typically feels responsive and fast.

A VPN transmits all network traffic, which means performance depends on the VPN link quality and the bandwidth available between your device and the remote network. If your VPN traffic is routing through an overloaded server or a congested link, everything slows down. This includes web browsing, file transfers, and application access.

Resource Requirements

RDP relies on the remote machine's CPU, RAM, and GPU. A powerful terminal server can serve multiple concurrent users efficiently. A modest desktop may struggle with intensive workloads. Understanding your resource needs before choosing an approach helps avoid performance surprises.

A VPN uses your local device's resources for most tasks, since applications run locally. The remote network's capacity becomes the limiting factor, not the remote machine's specifications.

User Experience

RDP can feel slightly laggy when network latency is high, particularly when typing quickly or moving the mouse. Applications that require high frame rates or smooth graphics may not perform well over RDP without proper configuration.

A VPN allows you to run applications locally, so the user experience depends entirely on your local hardware and internet connection. This is often preferable for graphic-intensive applications or tasks requiring real-time interaction.

When to Use a VPN

A VPN is the right choice when you need to access multiple systems on a remote network. The following scenarios typically favour VPN-based access:

  • Developers working on internal services: Accessing APIs, databases, and development environments across different subnets usually requires network-level reach.
  • IT staff managing servers: Direct access to server management interfaces, monitoring tools, and network infrastructure often needs broader network access.
  • Employees needing multiple resources: Staff who regularly use file shares, internal web applications, printers, and different workstations simultaneously benefit from network-level access.
  • Legacy system access: Older applications and hardware that do not have individual remote access mechanisms are typically accessed via VPN.

If your team uses a workstation at the office and needs to run applications that only exist on that workstation, a VPN does not help. You need to see that workstation's desktop, which means RDP.

When to Use RDP

RDP is the right choice when you need one specific machine and its installed applications. The following scenarios typically favour RDP-based access:

  • Licensed per-machine software: Accounting software that runs on a specific Windows server, CAD applications requiring a powerful GPU, and applications licensed per-seat on a particular workstation are natural candidates.
  • Controlled workstation environments: When you want to provide a secure, company-managed desktop to remote workers rather than allowing company applications to run on personal devices.
  • Security-sensitive roles: RDP access is limited to one specific machine. If an employee's device is compromised, the exposure is contained compared to a VPN that grants broader network access.

For small businesses, RDP to a central terminal server or company workstation is often simpler to manage and more secure than a full VPN, provided access is properly gated and monitored. This approach reduces complexity while maintaining good security hygiene.

Using Both Together

Many organisations use both technologies together. Employees connect via VPN to access the network, then launch an RDP session to their specific workstation. This is common in environments where staff need both broad network access and a full remote desktop. The VPN handles network-level connectivity while RDP handles the application delivery.

When both are in use, the VPN should be configured to restrict access to only the subnets required, rather than giving the VPN client full network access. RDP should use Network Level Authentication and, where possible, be exposed only through the VPN tunnel rather than directly to the internet.

A practical configuration might route all RDP traffic through the VPN connection, so the RDP port is never directly accessible from the public internet. This removes one of the most common attack vectors while still allowing legitimate remote work.

Security Considerations

Both VPN and RDP have had significant vulnerabilities. VPN servers have been exploited through flaws in OpenVPN, Cisco, and other implementations. RDP has been the vector for numerous ransomware attacks, particularly through the BlueKeep vulnerability and campaigns targeting exposed RDP ports.

VPN Security Essentials

  • Use key-based authentication: Combine certificates with strong passwords rather than relying on passwords alone.
  • Enforce strong password policies: Minimum length, complexity requirements, and regular rotation reduce brute force risk.
  • Enable perfect forward secrecy: This ensures that compromising one session key does not expose past sessions.
  • Restrict access to specific IP ranges: Where possible, limit VPN access to known IP addresses rather than allowing connections from anywhere.
  • Keep VPN software updated: Regular patching addresses known vulnerabilities before they can be exploited.

RDP Security Essentials

  • Never expose port 3389 directly to the internet: This port is one of the most commonly scanned and attacked on the internet.
  • Enforce Network Level Authentication: NLA requires successful authentication before establishing the RDP session, preventing unauthenticated connection attempts.
  • Use account lockout policies: Protect against brute force attacks by locking accounts after repeated failed attempts.
  • Enable RDP logging: Keep audit logs of RDP connections to detect suspicious activity.
  • Keep the RDP server fully patched: Microsoft regularly releases security updates for Remote Desktop vulnerabilities.
Security note: Port 3389 is one of the most frequently scanned and attacked ports on the internet. Automated bots constantly search for exposed RDP servers. If remote desktop access is required, put it behind a VPN, a properly configured jump host, or a remote desktop gateway rather than exposing it directly. The same principle applies when reviewing your broader application security risks — minimise exposed surface area wherever possible.

Cost and Management Considerations

VPN solutions range from open-source options like OpenVPN and WireGuard to commercial products with subscription pricing. WireGuard has gained popularity for its simplicity and performance, particularly for smaller deployments. Commercial VPN appliances offer easier management interfaces and support contracts, which may be worth the cost depending on your internal capabilities.

RDP is included with Windows Server and Windows Pro licenses, making it a cost-effective option if you already run Windows Server infrastructure. For Linux, xrdp provides similar functionality without licensing costs. Terminal server licensing from Microsoft can add cost for multiple concurrent users, so factor this into your planning if you need to support a larger team.

Management complexity differs significantly. A simple VPN for a small team might take an afternoon to set up and require minimal ongoing attention. A full VPN infrastructure supporting a large organisation with multiple locations, certificate management, and high availability requirements demands considerably more expertise and ongoing maintenance.

Which Should You Choose

Choose a VPN when multiple network resources are needed and your team is comfortable managing network-level access. Choose RDP when users need to access a specific workstation or run applications that only exist on that workstation. Use both when your environment requires the flexibility of network access for some tasks and a full desktop session for others.

For most small businesses, RDP to a central terminal server or company workstation is simpler to manage and more secure than a full VPN, provided access is properly gated and monitored. The reduced attack surface and contained scope often outweigh the flexibility benefits of a full VPN.

If your needs are primarily about accessing a small number of applications on specific machines, RDP plus a VPN gateway is usually more appropriate than granting full network access. This principle extends to broader website security practices and server configuration — give each service and user exactly the access they need, and nothing more.

Next Steps for Your Remote Access Setup

Choosing between VPN and RDP depends on your specific workflows, security requirements, and management capacity. For straightforward remote desktop access to company workstations or a terminal server, RDP with proper security controls is often the simpler path. For environments that require access to multiple network resources simultaneously, a well-configured VPN makes more sense.

If you are reviewing your current remote access setup and want a practical assessment of your configuration, you can get in touch with details of your current setup, the number of users, the resources that need to be accessed, and any security concerns you have noticed. A targeted review can identify misconfigurations and help prioritise improvements based on actual risk.