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Top Forums UNIX for Advanced & Expert Users Linux w/ local admin mounting nfs drives securely? Post 302226642 by Frostybeard on Tuesday 19th of August 2008 12:02:40 PM
Old 08-19-2008
Quote:
Originally Posted by broli
you know, the fstab file has one option that alows normal users to mount and unmount "things"
and "things" can include nfs mounts.
this option is defined per mount point.
man fstab and read about "user" and "users" (the s changes who can unmount it later)
When "users" has local admin rights, they can change their machine's "fstab" to "whatever" they want. They can also "do" things like "spoof" the nfs server "into" thinking they are someone else, "by" changing their "userid" or ip address. Problem still not solved.
 

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MOUNT.NFS(8)						      System Manager's Manual						      MOUNT.NFS(8)

NAME
mount.nfs, mount.nfs4 - mount a Network File System SYNOPSIS
mount.nfs remotetarget dir [-rvVwfnsh ] [-o options] DESCRIPTION
mount.nfs is a part of nfs(5) utilities package, which provides NFS client functionality. mount.nfs is meant to be used by the mount(8) command for mounting NFS shares. This subcommand, however, can also be used as a standalone command with limited functionality. remotetarget is a server share usually in the form of servername:/path/to/share. dir is the directory on which the file system is to be mounted. Under Linux 2.6.32 and later kernel versions, mount.nfs can mount all NFS file system versions. Under earlier Linux kernel versions, mount.nfs4 must be used for mounting NFSv4 file systems while mount.nfs must be used for NFSv3 and v2. OPTIONS
-r Mount file system readonly. -v Be verbose. -V Print version. -w Mount file system read-write. -f Fake mount. Don't actually call the mount system call. -n Do not update /etc/mtab. By default, an entry is created in /etc/mtab for every mounted file system. Use this option to skip making an entry. -s Tolerate sloppy mount options rather than fail. -h Print help message. nfsoptions Refer to nfs(5) or mount(8) manual pages. NOTE
For further information please refer nfs(5) and mount(8) manual pages. FILES
/etc/fstab file system table /etc/mtab table of mounted file systems SEE ALSO
nfs(5), mount(8), AUTHOR
Amit Gud <agud@redhat.com> 5 Jun 2006 MOUNT.NFS(8)
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