# What is a Tunnel Interstitial?

> A tunnel interstitial is a warning page a tunnel service shows visitors before passing them through to the shared app.

Source: https://layerv.ai/glossary/tunnel-interstitial/

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# What is a Tunnel Interstitial?

Several tunnel services put a warning or reminder page in front of browser visitors on free plans. ngrok and Microsoft dev tunnels describe theirs as anti-phishing measures, because free tunnel hostnames are used to host phishing pages.

The page usually disappears after a visitor clicks through once, when the request sends a specific header, or on a paid plan.

## How LayerV Implements This

qURL shows recipients no interstitial: the app’s hostname answers only networks admitted by a link, so there is no open page to abuse, and the link opens the app directly.

## Related

[Quick Tunnel](https://layerv.ai/glossary/quick-tunnel/) [Localhost Tunnel](https://layerv.ai/glossary/localhost-tunnel/)

[Guide: Get past the ngrok browser warning →](https://layerv.ai/guides/skip-ngrok-browser-warning/) [qURL vs ngrok →](https://layerv.ai/compare/qurl-vs-ngrok/) [Every localhost tunnel, compared →](https://layerv.ai/compare/localhost-tunnels/)



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*This markdown version is auto-generated from [https://layerv.ai/glossary/tunnel-interstitial/](https://layerv.ai/glossary/tunnel-interstitial/) for AI agents. Curated agent resources: [llms.txt](https://layerv.ai/llms.txt). For the full interactive experience, visit the HTML version.*