Forwarded Headers Reference

ngrok adds headers to each HTTP request with information about the original client IP, request scheme and request host header value.

Header	Description
x-forwarded-for	The IP address of the client who initiated the request. If this header exists on the original request, ngrok will append a new value.
x-forwarded-proto	The scheme of the original request, either http or https. If this header exists on the original request, ngrok will append a new value.
x-forwarded-host	The header from the client's request if it existed, otherwise is set to the request's Host header value.

Because ngrok appends values to x-forwarded-for and x-forwarded-proto, be sure to use the last value of the header in your application code to read the values injected by ngrok.

You may remove these headers with the Remove Headers Traffic Policy action.