Simplify the following text for a Grade 12 native English-speaking person.
Original: The X-Forwarded-For ( XFF ) HTTP header field is a de facto standard for identifying the originating IP address of a client connecting to a web server through an HTTP proxy or load balancer .
Simplified: The X-Forwarded-For ( XFF ) HTTP header is a standard for finding the IP address of a client connecting to a web server through an HTTP proxy or load balancer comes from .