Ah, so you agree NFS is not fit for purpose (network file sharing), and I should use something else to share files over the network.

EDIT (the above is a bit more snark than I intended, let me add a little more):

NFS's direct (still widely used) competitor, SMB, natively supports:

  - Authentication
  - Transfer encryption
  - Authentication encryption
  - Has open implementations across platforms
  - Supports individual account management, and large enterprisey account management (LDAP/AD/etc)

With SMB, I can share out a directory on the network that allows visitors access, optionally authenticated with a simple username and password.

I can share out specific directories with easy control over who can access what. You know, basic network file sharing capabilities.

[[ And, don't take this as a love for SMB, it too has many issues and legacy junk ]]