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Manual Chapter: Adding AJAX Blocking Response Behavior to a Security Policy
Manual Chapter
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Overview: Adding AJAX blocking and login response behavior

Normal policy blocking and login response behavior could interfere with applications that use AJAX. If you want to display a message or redirect traffic without interfering with the user experience while browsing to an AJAX-featured web application, you need to enable AJAX blocking behavior (JavaScript injection). You can implement blocking and login response behavior for applications that use AJAX with JSON or XML for data transfer.

Important: You can implement AJAX blocking behavior only for applications developed using one of the following frameworks:
  • Microsoft® ASP.NET
  • jQuery
  • Prototype®
  • MooTools

By default, if you enable AJAX blocking behavior, when an AJAX request results in a violation that is set to Block, Application Security Manager performs the default AJAX response page action. The system presents a login response if the application user sends an AJAX request that attempts to directly access a URL that should only be accessed after logging in.

Note: Enabling AJAX blocking behavior has performance implications.

Configuring the blocking response for AJAX applications

Before you can complete this task, you need to have already created a security policy for your web application. The application needs to have been developed using ASP.NET, jQuery, Prototype®, or MooTools to use AJAX blocking behavior.
When the enforcement mode of the security policy is set to blocking and a request triggers a violation (that is set to block), the system displays the AJAX blocking response according to the action set that you define. If a login violation occurs when requesting the login URL, the system sends a login response page, or redirects the user.
  1. On the Main tab, click Security > Application Security > Blocking > Response Pages.
  2. In the Current edited policy list near the top of the screen, verify that the edited security policy is the one you want to work on.
  3. Click the AJAX Response Page tab.
  4. Select the Enable AJAX blocking behavior (JavaScript injection) check box. The system displays the default blocking response and login response actions for AJAX.
  5. For the Default Response Page action setting, select the type of response you want the application user to receive when they are blocked from the application:
    • Custom Response lets you specify HTML text or upload a file to use as a replacement for the frame or browser page that generated the AJAX request. Include the text, then click Show to preview the response.
    • Popup message displays text in a popup window (default text is included).
    • Redirect URL redirects the user to the URL you specify. You can also include the support ID. For example: http://www.example.com/blocking_page.php?support_id=<%TS.request.ID()%>.
  6. For the Login Page Response action, select the type of response (types are the same as for default response page in Step 5).
  7. Click Save.
  8. To put the security policy changes into effect immediately, click Apply Policy.
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