ip based access behind nginx load balancer

[ahlatci]

Thank you for your answers but it did not help  me. Because I m using IIS, tomcat and Apache and I need to resolve for all http server. 
When I try to show client's ip on server , I can see  by like this jsp code " out.print(request.getHeader("X-Real-IP"));"

but ip based access rules on apache,tomcat and IIS  are not working.Actually I need to not change client's ip. could ngnix work transparent mode ?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,97154,97237#msg-97237