Azure - Backend getting IP from Azure Front Door not from the source

Question

I have an App Services that gets user data (IP) for logs from who uses my app. I deployed the Azure front door and since then, my application is collecting the Azure Front Door IP instead of my clients' device IP.

How can I fix this without change my application?

Thank you!

Answer 1

Azure Front Door retains the client IP address as part of documented headers.

In particular, your application would need to inspect and parse either X-Azure-ClientIP, X-Azure-SocketIP, or X-Forwarded-For headers depending on which best captures the source IP you're interested in.