Client IP Header controls which HTTP request header Atomile uses when passing the original client IP address to your origin server.

Use this feature when your origin server needs the viewer’s real client IP address for business logic, access control, security checks, or origin-side log analysis.

Configure Client IP Header

1. In Advanced Configuration, open Client IP Header.
2. Find the target domain in the domain table.
3. In the Client IP Header column, select the required option.

Option	Behavior	When to Use
Cdn-Src-Ip	Atomile adds the client IP address to the Cdn-Src-Ip request header. This is the default option.	Use this when your origin can read the Atomile-specific header directly.
X-Forwarded-For	Atomile sends the client IP address in the X-Forwarded-For request header. The IP value comes from the client IP detected by Atomile.	Use this when your origin, application, or log parser already relies on X-Forwarded-For.
Preserve original X-Forwarded-For	If the client request already includes X-Forwarded-For, Atomile passes the original header and value to the origin.	Use this only when you intentionally want to preserve the incoming X-Forwarded-For value.

4. Select Save Draft to save the configuration as a draft, or select Next to continue the configuration workflow.