Buyer Beware: A Major Change in NFS (in Rawhide) is about to happen
Steve Dickson
SteveD at redhat.com
Wed Oct 28 18:59:29 UTC 2009
On 10/27/2009 05:06 PM, Jason L Tibbitts III wrote:
>>>>>> "SD" == Steve Dickson <SteveD at redhat.com> writes:
>
> SD> On the server (Which is suggested): Add the following entry to the
> SD> /etc/exports file:
>
> SD> / *(ro,fsid=0)
>
> SD> Note: 'fsid=0' is explained in the exports(5) man pages.
>
> Could someone comment on any potential security issues that exporting
> the root in this way exposes?
Unfortunately this entry will expose your entire root in a read-only
fashion...
> If all of my exported filesystems happen to live under /export, can I
> export that directory instead of '/' and have things work properly?
Only by adding the above export entry would you be able to mount /export.
But since all your exports are under /export you might want to consider
making '/export' your pseudo root by doing something like:
/export *(ro,fsid=0)
/export/home *(rw)
Then the clients could do a 'mount /home' which would mount the
/export/home directory on the server... Plus if the client dose
a mount / the only directory they could 'see' would be 'home'
> If, for whatever reason, I need to export a file system that doesn't
> live in /export, would I still be able to mount it?
With the '/ *(ro,fsid=0)' entry, Yes, you would be able to mount other
exported directories..
With the '/export *(ro,fsid=0)' entry, No, the client will only see
directories under '/export'. The rest of the filesystem would not be
seen...
I hope this helps...
steved.
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