Le 20/09/2012 20:17, Anne Wilson a écrit :
Looks as though the problem relates to rpc on the server.  I
don't mind doing the digging, but can you point me to the right
place to start the hole?
I'd try to understand why the nfs daemon (rpc.nfsd) is listening on
IPv6 only, whereas the mount daemon (rpc.mountd) is listening both
on IPv4 and IPv6.

Where is that configured?
There is no such 'use IPv6 only' configuration option AFAIK, this seems rather like a problem. Maybe not specific to NFS, BTW.

There is no --verbose flag for rpc.nfsd, but you may use rpcdebug instead:
rpcdebug -m nfsd -s all

Then, restart the nfs-server service, and check your logs.

BTW, you're also lacking rpc.idmapd, which is mandatory for NFSv4
support, but that's a secondary issue.

I've done a lot of googling, and most of what I found was
ubuntu-specific.  However, I found a recent entry saying that it is
provided by nfs-utils - that that is installed.  nfs-common and
nfs-server are both running, according to mcc.
nfs-common service, as 90% of similar services, use an /etc/sysconfig/nfs-common congiguration file. Just set NEEDIDMAPD to yes to ensure it runs.

Also, you'd better forget GUIs when trying to debug issue, and ressort to command line instead, you'll have much more control and feedback.

 Following another
lead, I tried to locate nfsmount.conf and found that I had a backup
containing it, and a man page, but no actual file.
That's an interesting point, it means your actual setup differs from the default package one. Try 'rpm --verify nfs-utils' and 'rpm --verify nfs-utils-client' to check what has been modified exactly.

This is incredibly difficult.  Users shouldn't have to jump through
this number of hoops to do something so basic to productivity :-(
I'm not sure what users should have to do or not, but I'm quite sure this kind of imprecations won't help you solve the issue.

If everything else fails, you may also inhibit IPv6 completly: just add 'install ipv6 /bin/true' in any file under /etc/modprobe.d, and reboot.

--
BOFH excuse #364:

Sand fleas eating the Internet cables

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