Request and Response Behavior for Custom Origins - Amazon ...
For more information, see Managing how long content stays in the cache (expiration).. Client IP Addresses. If a viewer sends a request to CloudFront and does not include an X-Forwarded-For request header, CloudFront gets the IP address of the viewer from the TCP connection, adds an X-Forwarded-For header that includes the IP address, and forwards the request to the origin.
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