On 12/24/13 08:15, Robert P. J. Day wrote:
> Quoting Ed Greshko <Ed.Greshko(a)greshko.com>:
>
>> On 12/24/13 07:16, Robert P. J. Day wrote:
>>> Quoting Tom H <tomh0665(a)gmail.com>:
>>>
>>>> On Fri, Dec 20, 2013 at 2:34 PM, Robert P. J. Day
>>>> <rpjday(a)crashcourse.ca> wrote:
>>>>>
>>>>> a long, long time ago, i reported an apparent glitch with NFS on
>>>>> fedora:
>>>>>
>>>>>
https://lists.fedoraproject.org/pipermail/users/2010-January/097465.html
>>>>>
>>>>> in that, at the time, it *appeared* that you couldn't set up
>>>>> NFS so that *only* version 4 was running. before i start messing
>>>>> with this again, anyone know whether that's changed? that is,
>>>>> is it possible to set up a network in which only NFSv4 is running,
>>>>> and no earlier versions are supported? thanks.
>>>>
>>>> It's been possible to run nfsv4-only nfs for a long time, with only
>>>> port 2049 being let through the firewall. It only appears that you
>>>> can't because because rpc.mountd has to run on the server but
it's
>>>> only involved in the exporting and not the mounting.
>>>
>>> how does one configure fedora 20 to support only NFSv4? i'm used to
>>> mucking with /etc/sysconfig/nfs in earlier versions of RH, and tweaking
>>> the variables MOUNTD_NFS_V* and RPCNFSDARGS. i don't see those vars
>>> in fedora 20 and, according to "rpcinfo -p", i'm currently
supporting
>>> NFS versions both 3 and 4. so how does one turn off NFSv3? thanks.
>>>
>>>
>>
>> In /etc/sysconfig/nfs
>>
>> # Optional arguments passed to rpc.nfsd. See rpc.nfsd(8)
>> RPCNFSDARGS=""
>>
>> man 8 rpc.nfsd
>>
>> -N or --no-nfs-version vers
>> This option can be used to request that rpc.nfsd
>> does not offer
>> certain versions of NFS. The current version of
>> rpc.nfsd can sup‐
>> port NFS versions 2,3,4 and the newer version 4.1.
>>
>> Would seem to be what you are searching.
>
> i tried that and it didn't seem to work, in the sense that when i
> ran "rpcinfo -p" to verify the result, here's part of the output:
>
> 100003 3 tcp 2049 nfs
> 100227 3 tcp 2049 nfs_acl
> 100003 3 udp 2049 nfs
> 100227 3 udp 2049 nfs_acl
> 100003 4 tcp 2049 nfs
> 100003 4 udp 2049 nfs
>
> so isn't that telling me i still have both versions 3 and 4? here's
> the line i added to the file:
>
> RPCNFSDARGS="-N 2 -N 3"
>
Port 2049 is used by V4. I don't think V3 or V2 uses it....
I would add to the parameters -U to disable UDP and then attempt a
mount while specifying that nfs version 3 be used. That will verify
it.
as a quick test, i added "-U" but the only change was that
"rpcinfo -p" showed me that UDP was no longer being accepted
for v4 only:
100003 3 tcp 2049 nfs
100227 3 tcp 2049 nfs_acl
100003 3 udp 2049 nfs
100227 3 udp 2049 nfs_acl
100003 4 tcp 2049 nfs
to match what i see under RHEL, i was hoping to see *all*
references to NFSv3 disappear from the output of that command.
i'll test further later.
rday