VPN

A VPN (Virtual Private Network) is a technology that creates an encrypted tunnel between a user's device and a remote network or server, carrying data across the public internet as if both endpoints were on one private network. All traffic inside the tunnel is encrypted, so outsiders — including the operator of a Wi-Fi network — cannot read the information being sent.

How a VPN works

Once a connection is established, the VPN client encrypts packets and sends them to a VPN server, which decrypts the traffic and forwards it to its destination. To services on the internet, the request appears to come from the VPN server rather than the user's real IP address. Security rests on protocols such as WireGuard or OpenVPN and on the same encryption mechanisms that underpin TLS and HTTPS.

Common uses

A VPN is used to connect remote workers securely to a corporate network, to protect data on open public networks, and to administer servers — for example allowing access to a VPS control panel only from a trusted network. In infrastructure, a VPN often works alongside a firewall that permits administrative traffic only from an internal address range. It is worth remembering that a VPN protects transmission but does not replace other safeguards: software updates, strong passwords and backups. For companies hosting their own applications, a VPN is often a standard part of the access policy, separating the public part of a service from sensitive management tools, which sharply reduces the exposure of critical infrastructure to the open internet.