can you (theoretically) run only NFSv4 (without earlier versions)?

[Ed Greshko]

On 12/24/13 17:21, Tom H wrote:
> On Tue, Dec 24, 2013 at 2:10 AM, Ed Greshko <Ed.Greshko at greshko.com> wrote:
>>
>> After making the suggested changes.....
>>
>> [root at meimei ~]# mount -o ro,nfsvers=4 192.168.0.196:/home /mnt
>> [root at meimei ~]# mount | grep mnt
>> 192.168.0.196:/home on /mnt type nfs4 (ro,relatime,vers=4.0,rsize=262144,wsize=262144,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.0.18,local_lock=none,addr=192.168.0.196)
>> [root at meimei ~]# umount /mnt
>>
>> [root at meimei ~]# mount -o ro,nfsvers=3 192.168.0.196:/home /mnt
>> mount.nfs: requested NFS version or transport protocol is not supported
> I tried disallowing v2 and v3 on Fedora 19 and failed.
>
> "cat /proc/fs/nfsd/versions" shows that v2 and v3 are allowed by the
> kernel and "mount -t -o nfsvers=3 ..." succeeds.
>
> I ssh'd into a RHEL 6 box and an Ubuntu 14.04 VM where I know that v2
> and v3 are disabled.
>
> "cat /proc/fs/nfsd/versions" shows that v2 and v3 are disallowed and
> "mount -t -o nfsvers=3 ..." fails.
>
> I must've done something wrong on Fedora 19. I'll have to try again
> later, but I can't see anything wrong in my setup offhand.

On an F20 system where I'm doing the testing

root at f20f ~]# cat /proc/fs/nfsd/versions
-2 -3 +4 +4.1 -4.2

Shows only 4 and 4.1 allowed.

I suppose I could try it on F19 for you at some point.



-- 
Getting tired of non-Fedora discussions and self-serving posts