> 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/ip-zugriffssteuerung.md).

# IP-Zugriffssteuerung

## Was ist IP-Zugriffskontrolle?

Der IP-Sicherheitsparameter beschränkt den Zugriff auf das Formular basierend auf der IP des Befragten.

{% hint style="info" %}
ngSurvey liest die weitergeleitete IP, wenn sich der Befragte hinter einer Firewall oder einem Proxy befindet. 
{% endhint %}

{% hint style="warning" %}
Einige Befragte hinter Unternehmens-Firewalls oder Proxys können dieselbe IP-Adresse haben. ngSurvey unternimmt sein Bestes, um die echte IP zu ermitteln, aber abhängig vom Modus der Firewalls oder Proxys ist es manchmal unmöglich, pro Befragtem eine eindeutige IP zu erhalten.
{% endhint %}

## 🔅 IP-Zugriffskontrolleigenschaften

* **`IP`**ist die IP, die entweder Zugriff auf die Umfrage gewähren oder verweigern soll. IP-Masken mit \* innerhalb der IP werden vollständig unterstützt.


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