Attackers can create their own website and use it to load the contents of your website within an iframe. This can result in a clickjacking attack, whereby the attacker targets user input or tricks the user into performing undesired actions within the fake application.

To prevent this, you can create an X-Frame-Option HTTP response header. This stops site content from being embedded into other websites.

To create an X-Frame-Option HTTP response header

1. Open the configuration file web.config for the chosen web application.

2. In the <configuration> section, enter the following code snippet:

   <httpProtocol>
       <customHeaders>
           <add name="X-Frame-Options" value="SAMEORIGIN" />
       </customHeaders>
   </httpProtocol>

3. Save the file.