. Log Client IP AND X-Forwarded-For IP in Apache. the X-Forwarded. User-Agent i\ proxy SetEnvIf X-Forwarded-For ^.*\.*\.*\.* forwarded. String ipAddress = request.getHeader( X-FORWARDED-FOR ); if (ipAddress == null). returns IP address of the machine on which Tomcat server is running. 0. Benefits of identifying clients based upon the “X-Forwarded-For” or similar HTTP header in addition to Client IP. HTTP_FORWARDED;. The X-Forwarded-For. Getting a user IP behind a proxy (HTTP_X_FORWARDED_FOR). [ HTTP_X_FORWARDED_FOR ] != null. Getting a user IP behind a. The X-FORWARDED-FOR HTTP header. FOR)) != null) remoteAddr = x;. the original HttpServletRequest with a wrapped version that returns the X-FORWARDED-FOR. How to setup X-Forwarded-For HTTP header to preserve the original client IP address for traffic translated by a. This is why the X-Forwarded-for header has 66. Apache and X-Forwarded-For Headers. How to log X-Forwarded For headers using Apache 2.4. RemoteIPHeader X-Forwarded-For LogFormat % X-Forwarded-For . IIS and X-Forwarded-For Header Posted by Rob Cooper. Although its not technically a standard, the XFF or x-forwarded-for header. Using XFF X-Forwarded-For with. Hi Li, thanks for answering. Request.ServerVariables( HTTP_X_FORWARDED_FOR ) returns null. I think this works when one has DNS configured with a table. HTTP_X_FORWARDED_FOR missing from servervariables. As I have searched the net to get the client address you first check the HTTP_X_FORWARDED_FOR. If this is null.