An ecommerce application is running behind an Application Load Balancer.A developer observes some unexpected load on the application during non-peak hours.The developer wants to analyze patterns for the client IP addresses that use the application.
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, not the client’s IP address.
The X-Forwarded-Host header carries the original host requested by the client in the Host HTTP request header, not the client’s IP address.
The X-Forwarded-For header contains the client’s IP address as it passes through the load balancer, making it ideal for analyzing client IP patterns.
The X-Forwarded-Port header indicates the port used by the client to connect to the load balancer, not the client’s IP address.
In my opinion, the answer is:
The X-Forwarded-For header