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What is the name of the option that disables root squashing?
Some Linux NFS servers have an option called no_root_squash which disables the default behavior of squashing the root user. Root squashing is a security feature. NFS commands executed as the root user on the client will be considered as originating from the “anonymous” user.
What is no root squash in NFS?
3. Do Not Use the no_root_squash Option. By default, NFS shares change the root user to the nfsnobody user, an unprivileged user account. If no_root_squash is used, remote root users are able to change any file on the shared file system and leave trojaned applications for other users to inadvertently execute. …
What does No_subtree_check mean?
no_subtree_check This option disables subtree checking, which has mild security implications, but can improve reliability in some circumstances.
What is meaning of root squash in NFS?
Root squash is a special mapping of the remote superuser (root) identity when using identity authentication (local user is the same as remote user). Under root squash, a client’s uid 0 (root) is mapped to 65534 (nobody). It is primarily a feature of NFS but may be available on other systems as well.
What is the main difference between root squash and No_root_squash in NFS?
root_squash prevents remote root users from having superuser (root) privileges on remote NFS-mounted volumes. no_root_squash allows root user on the NFS client host to access the NFS-mounted directory with the same rights and privileges that the superuser would normally have.
How do I enable root squashing?
On the File systems page, choose the file system that you want to enable root squashing on. On the file system details page, choose File system policy, and then choose Edit. The File system policy page appears. Choose Prevent root access by default* under Policy options.
What NFS option allow root access?
An NFS server can grant superuser capabilities on a shared file system on a per-host basis. To grant these privileges, use the root= hostname option to the share command. You should use this option with care.
What is NFS root access?
In general, superuser is not allowed root access to file systems that are shared across the network. The NFS system prevents root access to mounted file systems by changing the user of the requester to the user nobody with the user ID 60001.