Hi Danny,
The only reason one might use NFS on the source machine is for the scenario I described yesterday where you are making the ASE database dumps available to the ASE backup server running on the staging server. As I mentioned, this is just one technique of making the dumps available to the staging server.
There are various security measures that can be taken to limit access to NFS shares. For example, the source host can share the NFS directory to a particular host so that no other hosts on the network have access to it.
Thanks,
Neal