nfs no access by root

I have two linux hosts on my little playbox linux LAN . My big box has all
my files (cvs + backup). Laptop's ordinary user (holiday) automounts my
big box's ordinary user's (holiday) home directory. Laptop's holiday can
access big box's holiday, but laptop's root can not.

laptop:root# cd /home/holiday/bigbox/holiday

gets access denied.

whereas
laptop:holiday$ cd /home/holiday/bigbox/holiday
gets in just fine.

This is weird to me. I would think that any machine's root could access
any mounted volume.

But clearly this is not so.

What is really so in this situation?

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In comp.os.linux.networking stephen <(E-Mail Removed)> suggested:

> I have two linux hosts on my little playbox linux LAN . My big box has all
> my files (cvs + backup). Laptop's ordinary user (holiday) automounts my
> big box's ordinary user's (holiday) home directory. Laptop's holiday can
> access big box's holiday, but laptop's root can not.
[..]

> This is weird to me. I would think that any machine's root could access
> any mounted volume.

Nothing weird about it, it depends IIRC on the export options,
check 'man 5 exports' about no_root_squash/root_squash.

Good luck

--
Michael Heiming (GPG-Key ID: 0xEDD27B94)
mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
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On 2004-09-11, stephen <(E-Mail Removed)> wrote:

> I have two linux hosts on my little playbox linux LAN . My big box has all
> my files (cvs + backup). Laptop's ordinary user (holiday) automounts my
> big box's ordinary user's (holiday) home directory. Laptop's holiday can
> access big box's holiday, but laptop's root can not.
>
> laptop:root# cd /home/holiday/bigbox/holiday
>
> gets access denied.
>
> whereas
> laptop:holiday$ cd /home/holiday/bigbox/holiday
> gets in just fine.
>
> This is weird to me. I would think that any machine's root could access
> any mounted volume.

Not with NFS. Allowing root access to a network filesystem means that a
root compromise on one machine puts the entire network accessing the
filesystem at risk.

> But clearly this is not so.
>
> What is really so in this situation?

Check "man exports" for more details,,,

--

-John ((E-Mail Removed))