Hi Payam,

Thanks for the response, but yes you are slightly misunderstanding, mainly because I don't think I was clear enough. IIS can not process and X-Forwarded-For header without installing a special ISAPI filter. We can not install the required ISAPI filter because the vendor will not let us. So we are looking for a way to rewrite the IP address that nginx uses when making the request from the backend server.

Thanks again,

Curtis