Overview:

You can define a filter to protect Kerio Control users from potentially harmful objects in web pages.

By default, Kerio Control does not block any web elements.

Blocking web elements

1. In the administration interface, go to the Users section.
2. Double-click a user's name, or click Template to apply the filter to all users in the domain.
3. In the Edit User or Edit User Template dialog box, go to Preferences.
4. Select the type of objects you want to block:

• Filter out HTML Java applets blocks applets in Java.
• Filter out HTML ActiveX objects allows or blocks object and embedded HTML tags. Active objects at web pages.
• Filter out HTML Script tags blocks the executive code in JavaScript, VBScript, and so on.
• Filter out HTML JavaScript pop-up windows allows or blocks the window.open() method in JavaScript. Automatic opening of new browser windows, usually pop-up windows with advertisements.
• Filter out cross-domain referrer enables or disables the HTTP referrer item in headers.

5. Click OK.

If users complain about the functionality of important web pages after the filter is enabled, deselect some options on the Preferences tab.