CentOS - Jul 2008 - NFS V4?

Looks like just starting the nfs service turns on V2, 3, and 4 (based on
reading the script, reading the man pages, and looking at the ports using
netstat -l).

However, I can connect using -t nfs in the mount, and -t nfs4 fails.

I don't believe this is a firewall issue, internal IPs are fully open to
each other according to an early rule in iptables.

$ sudo mount host03:/home/ddb /mnt/ddb -t nfs4 -o rw,hard,intr
mount: permission denied

but

$ sudo mount host03:/home/ddb /mnt/ddb -t nfs -o rw,hard,intr
$

I'm not sure I especially care about NFS V4 (this is to share the
programmers' home directories, so it's easy to work on any of the
production systems; it won't be particularly high-load or any particularly
strange usage pattern), but I care about understanding things at least.

Both systems are running Centos 4.6.

Any ideas?
-- 
David Dyer-Bennet, dd-b at dd-b.net; http://dd-b.net/
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David Dyer-Bennet wrote:
> I'm not sure I especially care about NFS V4 (this is to share the
> programmers' home directories, so it's easy to work on any of the
> production systems; it won't be particularly high-load or any
particularly
> strange usage pattern), but I care about understanding things at least.
>
> Both systems are running Centos 4.6.
>
> Any ideas?
Try it entirely as root instead of with sudo? Also see this it may have
useful info:
http://www.citi.umich.edu/projects/nfsv4/linux/using-nfsv4.html

I wouldn't bother with NFSv4 myself, looks too complicated.

nate