Modifying the Alarm Page

If a visitor is blocked by WAF, the Default block page of WAF is returned by default. You can also configure Custom or Redirection for the block page to be returned as required.

If you have enabled enterprise projects, ensure that you have all operation permissions for the project where your WAF instance locates. Then, you can select the enterprise project from the Enterprise Project drop-down list and customize alarm pages for the domain names.

Prerequisites

You have connected the website you want to protect to WAF.

Constraints

The Redirection mode is not supported if you select Cloud Mode - Load balancer for the protected website.
The content of the text/html, text/xml, and application/json pages can be configured on the Custom block page to be returned.
The root domain name of the redirection address must be the same as the currently protected domain name (including a wildcard domain name). For example, if the protected domain name is www.example.com and the port is 8080, the redirection URL can be set to http://www.example.com:8080/error.html.

Editing Response Page for Blocked Requests

Log in to the management console.
Click in the upper left corner of the management console and select a region or project.
Click in the upper left corner and choose Web Application Firewall under Security & Compliance.
In the navigation pane on the left, choose Website Settings.
In the Domain Name column, click the domain name of the website to go to the basic information page.
Click the edit icon next to the page template name in the row where Alarm Page is located. In the displayed Alarm Page dialog box, specify Page Template.
- To use the built-in page, select Default. An HTTP code 418 is returned.
  Figure 1 Default alarm page
- To customize the alarm page, select Custom and configure following parameters.
  - HTTP Return Code: return code configured on a custom page.
  - Response Header: Click Add Response Header Field and configure response header parameters.
  - Block Page Type: The options are text/html, text/xml, and application/json.
  - Page Content: Configure the page content based on the selected value for Block Page Type.
  Figure 2 Custom alarm page
- To configure a redirection URL, select Redirection.
  Figure 3 Redirection alarm page
  
  The root domain name of the redirection URL must be the same as the currently protected domain name (including a wildcard domain name). For example, if the protected domain name is www.example.com and the port is 8080, the redirection URL can be set to http://www.example.com:8080/error.html.
Click Confirm.