My environment... I am not sure what kind of description is needed... but computers need to be first to authenticate and get an IP from OpenVPN before they can send any packets through the network... so I suppose I don't really need additional security from NFS?
I still don't understand how the uid/gid thing works... are there any document about it? Last time I had NFS I had to keep ssh into the file server and change gid... so I guess I probably have not used it correctly? I never have heard of NIS... but how would that work with laptops, which are suppose to be portable and move between different networks everyday, that is, home, school and work for me.

