Which HTTP header should the developer use for this analysis?
The X-Forwarded-Proto header
The X-Forwarded-Host header
The X-Forwarded-For header
The X-Forwarded-Port header
Explanations:
The X-Forwarded-Proto header indicates the protocol (HTTP or HTTPS) used by the client to connect to the load balancer, but it does not provide information about the client IP addresses.
The X-Forwarded-Host header specifies the original host requested by the client in the Host HTTP request header. It does not contain client IP address information necessary for the analysis.
The X-Forwarded-For header is used to identify the originating IP address of a client connecting to a web server through a load balancer. It is essential for analyzing client IP patterns and traffic.
The X-Forwarded-Port header indicates the port number that the client used to connect to the load balancer, which is not useful for analyzing client IP address patterns.
I measure that the answer is:
The X-Forwarded-For header