Detecting User IPs & Protocols
All web requests that hit your app first go through your app's routing-mesh/load-balancer. Because of this, trying to detect the origin IP and/or protocol of requests using the usual methods will returns the IP and protocol of the load-balancer rather than the request's origin's. To mitigate this issue, the load-balancer sets/appends headers with the appropriate information.
Detecting User IPs
To detect the origin IP of a request, use the
X-Forwarded-For header. Your app's load-balancer sets or appends this header with the origin IP of the request.
Detecting Request Protocols
To detect the protocol of the request (http or https), use the
X-Forwarded-Proto header. Your app's load-balancer sets this header with the request's origin protocol.
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