Tunnelprobe

Meet Tunnelprobe

Tunnelprobe is a browser-based tool for checking what a website may be able to learn about a VPN connection. It tests signals including public IP addresses, DNS resolution, WebRTC and proxy headers, and compares browser details with the apparent exit location. Optional checks can examine local-network router responses, request browser location access or inspect a server-side TCP fingerprint. Results include explanations and suggestions for investigating a finding, and can be copied or saved as JSON. The tool is particularly oriented toward residential VPN setups and travel routers, helping users review their own configuration without installing a desktop application.