I successfully assing a public IP address to an internal Server using mikrotik cloudrouter, but when I look at my apache server log in my linux server I only see the ip address of my router as the only one accesing my server instead of public ip address for clients ? What I’m doing wrong??? 
You where setting up two posts as a so called double post!
This was wrong, I answered this question here http://forum.mikrotik.com/t/assing-public-ip-to-internal-server/77969/1