Securing the NFS System
Using the NFS environment is a convenient way to share file systems over the network. However, at the same time, file sharing in the NFS environment poses security risks. The NFS server authenticates a computer making a file request. However, it does not authenticate users using the Unix authentication. Users in a Unix environment all have unique IDs within a domain. However, they may not have unique IDs across domains. Therefore, any user can become the superuser of a computer and can make file requests. By using Data Encryption System (DES), NFS server makes this kind of impersonation harder.
Users can protect the privacy of sensitive information by encrypting data that goes over the network. DES authentication uses ...