Netapp and krb5

Hi all,

I resend this message to the list, the previous one is probably stuck
in the moderation queue with thousands of spams ...

I'm trying to mount a cifs share from a netapp 7.0.1.1 share to a
linux box running Ubuntu 9.04 with sec=krb5 and a windows 2000 AD.
But that's failing :

[ 6924.132239]  /build/buildd/linux-2.6.28/fs/cifs/cifssmb.c: Dialect: 2
[ 6924.132246]  /build/buildd/linux-2.6.28/fs/cifs/cifssmb.c: negprot rc -5
[ 6924.132255]  /build/buildd/linux-2.6.28/fs/cifs/connect.c: CIFS
VFS: leaving cifs_mount (xid = 3402) rc = -5
[ 6924.132260]  CIFS VFS: cifs_mount failed w/return code = -5

With the same setup I managed to mount a Win2003 and samba 3 shares
with kerberos.
Using smbclient -k or gvfs2 smb:// is ok with the Netapp share.
I'm not root, mount.cifs have a correct suid.
The /etc/request-key.conf is ok (and it's working with win2003 and samba 3)
The machine account in the AD is the same as the reverse dns name.
It's working fine with NTLM authentication.

I'm running out of option, I could provide a network trace if you give
me a private user email (I won't post that on the list).

Please help,
 Thomas Sondag