---
title: "[How Do I:] Use the ASP.NET AJAX NoBot Control? | Microsoft Docs"
author: JoeStagner
description: "The NoBot control from the ASP.NET AJAX Control Toolkit helps prevent certain types of unauthorized access to your Web applications. In this video we see how..."
ms.author: aspnetcontent
manager: wpickett
ms.date: 05/29/2007
ms.topic: article
ms.assetid: 15282963-2ec5-4013-b6bc-f1fcf272818e
ms.technology: dotnet-webforms
ms.prod: .net-framework
msc.legacyurl: /web-forms/videos/ajax-control-toolkit/how-do-i-use-the-aspnet-ajax-nobot-control
msc.type: video
---
[How Do I:] Use the ASP.NET AJAX NoBot Control?
====================
by [Joe Stagner](https://github.com/JoeStagner)

The NoBot control from the ASP.NET AJAX Control Toolkit helps prevent certain types of unauthorized access to your Web applications. In this video we see how the NoBot control provides a number of built-in guards against automated access, including checking the number and frequency of form submissions. We also see how the control allows the developer to define a custom challenge, such as a JavaScript test that will succeed only if the page is viewed in a browser.

[▶ Watch video (21 minutes)](https://channel9.msdn.com/Blogs/ASP-NET-Site-Videos/how-do-i-use-the-aspnet-ajax-nobot-control)

>[!div class="step-by-step"]
[Previous](how-do-i-use-the-aspnet-ajax-mutuallyexclusive-checkbox-extender.md)
[Next](how-do-i-use-the-aspnet-ajax-listsearch-extender.md)