I'm dumping acronis images of a running windows server network to shared folders on an Iomega storcenter (a simple NAS) which provides it's shared folders through cifs. It does not run windows nor allows to install any kind of software on it. I want to replicate the simple shared folder on that Iomega storcenter that contains all dumped acronis images and incremental images to a windows server on another site over vpn (200kbit/s WAN link) on a block or bit based level. That means that if a certain large image changes, only the incremental changes are replicated and not the entire file. Which software allows this considering all limiting factors mentioned here (such as not being able to install remote agent software of any kind on the iomega storcenter) Looking for a simple (if possible cheap) piece of software that can run fully automated so that I always have a remote site with an exact copy of that image file directory.