> For the complete documentation index, see [llms.txt](https://docs.ngsurvey.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ngsurvey.com/de/form-management/security/security-items/referer.md).

# Referer

Der Referer überprüft, dass der Befragte von einem bestimmten http-Link kommt. Wenn Sie den [Weblinks](/de/form-management/publish-deploy/web.md) auf Ihrer Webseite eingefügt haben, können Sie erzwingen und überprüfen, dass die Befragten über diesen Link von dieser Seite kommen und den Link nicht direkt oder von einer anderen Stelle verwenden.

## 🔅 Referer-Eigenschaften

* **`Referer`** URL der Seitenseite, die Ihren [survey-Link](/de/form-management/publish-deploy/web.md). Die URL muss genau die gleiche sein, die in der Browser-Adressleiste angezeigt wird, während Sie sich auf der Seite befinden, die den survey-Link hostet.


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# Agent Instructions
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## Querying This Documentation
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Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

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