A VPN gateway is a device or software that connects two networks securely over the internet. It creates a private tunnel for data, ensuring that information sent between the networks remains encrypted and protected from unauthorized access. This is especially useful for businesses that need to connect remote offices or allow employees to work from home securely. In addition to connecting networks, a VPN gateway can also provide secure access for individual users. By using a VPN client, users can connect to the gateway, allowing them to browse the internet privately and access restricted content while maintaining their online security.