Quoting Caffeinate The World (mochaexpress@yahoo.com):
> > PS. please no comments about security. it's my home network.
> 
> Sorry Wojciech I can't answer your question. However, I DO have a
> question regarding NFS security. If it's insecure, what are the secure
> alternatives?

AFS
NFS over IPSec perhaps
I used to use a kerberized NFS, but AFS is generation 2, really.
NFS V4 has some hooks to do Good Things.
Samba  (ok, I don't mean it).