Check Point UTM-1. The Network File System (NFS) is a client / server application that lets a computer user view and optionally store and update file on a remote computer as though they were on the user's own computer.The user's system needs to have an NFS client and the other computer needs the NFS server.he Network File System (NFS) is a client / server application that lets a computer user view and optionally store and update file on a remote computer as though they were on the user's own computer. The user's system needs to have an NFS client and the other computer needs the NFS server.