> ## Documentation Index > Fetch the complete documentation index at: https://gcore.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Specify HTTP headers that CDN adds to requests to the origin The Request Headers option allows you to specify HTTP headers that CDN will include when making requests to the origin. To configure request headers via the Gcore Customer Portal: 1\. Go to CDN and select the CDN resource you want to configure.

2\. In the navigation panel, under the "HTTP headers" section, click **Request headers**.

3\. Navigate to the "Request headers" section and enable the **Add request headers** toggle option.

4\. In the form that appears, enter the name and value for the request header. * **Header name** : This field accepts letters (A-Z, a-z), numbers (0-9), dashes (-), and underscores (\_). * **Value** : This field accepts letters (A-Z, a-z), numbers (0-9), dashes (-), underscores (\_), slashes (/), colons (:), equal (=), dots (.), and spaces. form

**Note** : If your "Value" field includes multiple words, you can add a space between them. However, the Value field cannot begin or end with a space. 5\. Continue to click **Add header** to add a new item.