I am trying to get the IP address of the client who uses proxies. However, when I checked the ServerVariables list that is produced I do not see HTTP_X_FORWARDED_FOR out of the 50 that is listed. Thus I am unable to use this http header to accomplish my task. This issues occures both in .net 3.5 and .net 4.0. Any thoughts as to why this is? Thank you.
 
 
HttpContext.Current.Request.ServerVariables("HTTP_X_FORWARDED_FOR").ToString()
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