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NFS security

NFS security: Linux System Engineer: Network Filesystems using NFS and Samba
NFS security: Linux System Engineer: Network Filesystems using NFS and Samba

Because NFS authenticates a host and not a user it can be problematic trying to secure it. We can restrict by hosts in addition to creating firewall rules doing the same. We can squash all users to a nobody account or just the root user. However, the NFS server trusts the client to identify its own users. This means that if a client can connect to an NFS server then the security is largely up to the client OS. NFS 4 added support for Kerberos so it can authenticate a user instead of a host.

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