> For the complete documentation index, see [llms.txt](https://clients.medianova.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clients.medianova.com/products/performance-cdn/static-content-delivery/advanced-configuration/headers/x-frame-options.md).
# X-Frame Options
Learn how the X-Frame Options feature controls which sites are allowed to frame your content.
**X-Frame-Options** adds the `X-Frame-Options` header to viewer-facing responses. This header controls whether browsers allow your content to be displayed inside frames.
You can configure X-Frame-Options in the [Medianova Control Panel](https://cloud.medianova.com) or via the [API](https://clients.medianova.com/api-documentation/performance-cdn/headers#put-api-v1-cdn-organization_uuid-resource-resource_uuid-5).
{% hint style="warning" %}
`ALLOW-FROM` is not supported by all modern browsers. For broader compatibility when allowing specific framing origins, consider using the `Content-Security-Policy: frame-ancestors` directive at the origin.
{% endhint %}
### Configure X-Frame-Options
{% stepper %}
{% step %}
### Open X-Frame-Options
Open your CDN Resource and select **Headers**.
Locate the **X-Frame-Options** section.
{% endstep %}
{% step %}
### Enable X-Frame-Options
Enable **X-Frame-Options**.
{% endstep %}
{% step %}
### Configure Allowed Sites
To allow framing from specific sites, enter a domain in **Allowed sites** and select **Add**.
If no domain is configured, the CDN sets:
```http
X-Frame-Options: SAMEORIGIN
```
This allows framing only from the same origin.
If one or more domains are configured, the CDN applies:
```http
X-Frame-Options: ALLOW-FROM
```
for the configured domains.
{% endstep %}
{% step %}
### Save the Configuration
Click **Save** in the pending changes bar.
Review the pending changes and confirm the update.
{% endstep %}
{% endstepper %}
## Behavior
When X-Frame-Options is enabled:
* The CDN adds the `X-Frame-Options` header to viewer-facing responses.
* If no domain is configured, the CDN uses `SAMEORIGIN`.
* If one or more domains are configured, the CDN uses `ALLOW-FROM ` for the configured sites.
* The header affects viewer-facing responses only and does not modify requests sent to the origin.
## Browser Compatibility
The `ALLOW-FROM` directive is not supported by all modern browsers. If your application must allow framing from specific external origins, consider configuring the `Content-Security-Policy: frame-ancestors` directive at the origin alongside this setting.
---
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