block root access to NFS mount
Mark Haney
mhaney at ercbroadband.org
Tue Sep 12 11:12:10 UTC 2006
Jeff Vian wrote:
> On Mon, 2006-09-11 at 14:28 -0400, Mark Haney wrote:
>
>> Okay, here's a problem I'm running in to. I have an NFS server that is
>> controlled via NIS for which hosts access the NFS mounts. I need to
>> give root access to an NFS client host machine, but /not/ the NFS
>> mounts. Is there any way at all to control this, other than making the
>> NFS mounts read only?
>>
>> (Yeah I know it's a strange question, but time is pressing and I don't
>> have enough of it to google.) Any help would be appreciated.
>>
>>
>
> By default NFS maps root to nobody. Only if the no_root_squash option
> is used when exported does root from the client have root privileges on
> the nfs filesystem.
>
> Often this also means that root may not even access the nfs filesystem
> at all.
>
> HTH
> "man exports" will give more info, specifically in in the User ID
> Mapping section.
>
>
> Let me see if I understand you, if I don't have 'no_root_squash' in my
> /etc/exports file for a particular NFS share, then if I am root on the
> /client/ I cannot access that NFS mount? If so, that's exactly what
> I"m looking for.
--
Ceterum censeo, Carthago delenda est.
Mark Haney
Sr. Systems Administrator
ERC Broadband
(828) 350-2415
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