AIX NFS Version 4 configuration over Kerberos inter-realm setup
Since security is one of the key aspects and selling features of Network File System Version 4 (NFS Version 4), it is widely being accepted as the next-generation distributed file system. The current implementation of NFS Version 4 makes use of Kerberos (RFC 4120) as its underlying security mechanism to achieve authentication, privacy, integrity, and non-repudiation. IBM has its own implementation of NFS Version 4 for its AIX operating system, which makes use of IBM Network Authentication Service Version 1.4 (IBM NAS—the IBM flavor of Kerberos) for kerberizing the file system.
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