Dear I don't know for general bandwidth, I heard just there is some kernel module which can meassure that. For Apache I know there is mod_throttle, which can meassure per user or virtual host the bandwidth. It just needs to be enabled in Apache conf file. Other modules to meassure bandwidth can be found on http://modules.apache.org but I am not sure for the URL that works. Sincerely, Marko Cehaja