VPN Clients
VPN clients are software applications or built-in operating system components that allow users to establish and manage VPN connections on their devices. They serve as the user-facing side of a VPN connection, handling setup, authentication, protocol selection, and connection management.
As VPN technology became more widely used in the 1990s, dedicated client software began appearing for specific platforms and operating systems. In many cases, these clients were provided by VPN vendors and built to support particular protocols or connection methods.
Over time, major operating systems such as Windows, macOS, iOS, Android, and Linux began adding built-in VPN support. That made it easier to configure certain VPN types without installing separate third-party software. Even so, third-party VPN clients remain common because they often provide added features, easier configuration, support for more protocols, or tighter integration with a provider’s service.
A VPN client usually includes connection management features that allow the user to enter server details, choose connection methods, manage credentials, and start or stop encrypted sessions. Depending on the platform and the service, the client may also support multiple protocols such as IPsec, IKEv2, OpenVPN, WireGuard, L2TP, or older legacy options.
Many VPN clients also include server selection tools so the user can choose where to connect. These tools may display location names, server availability, latency, or other basic status information to help the user choose an appropriate endpoint.
Security and encryption settings are another common part of VPN clients. Some clients allow the user to configure authentication methods, DNS handling, routing behavior, and other options that affect how traffic is secured and where it flows. More advanced clients may also support features such as kill switches, split tunneling, certificate-based authentication, or multi-factor login integration.
VPN clients often provide status and diagnostic information as well. This can include whether the tunnel is active, how long the session has been connected, what address has been assigned, and limited troubleshooting information when a connection fails.
In more advanced deployments, VPN clients may also offer customization options for routing, DNS preferences, local network access, proxy interaction, or policy-based behavior. The exact feature set depends on the operating system, the protocol in use, and the design of the VPN service itself.
Choosing the right VPN client is not only a matter of convenience. It also affects compatibility, security, ease of deployment, and how much control the user has over the connection. In some environments, the built-in client provided by the operating system is enough. In others, a dedicated client is preferred because it offers features or controls the built-in tools do not provide.