For the Dynamic IP address using dyndns.org could be the solution. BTW: I have a SS4000E home Nas lying around with debian installed, with 4 250gb disks, but performance, number of concurrent connections and my upload bandwidth will be a problematic. Also from a security point of view I'm stuck with an old kernel version or I have to forward port a bunch of kernel patches (and my spare time is very limited). Nonetheless if it could be somehow useful i will set it up with the help of some real admin.