Is anyone currently using CentOS 5.5 with 2008 R2 AD authentication and a fully Kerberized NFSv4? If so would you mind sharing your configuration with me? I have been able to successfully get it working with Windows 2003 as discussed earlier on the list http://lists.centos.org/pipermail/centos/2010-July/096374.html With the exception that I had to use dynamic UIDs on the machine since we don't have Services for UNIX installed. Instead of going with a long drawn out certification of Windows 2003 R2 w/SFU, we plan to target our deployment in line with our Windows 2008 R2 campus deployment. I have followed everything that I did with Windows 2003 to get it working but NFSv4 w/Kerberos doesn't seem to work with 2008 R2 at all. No matter what I try I consistently get WARNING: Client not found in Kerberos database while getting initial ticket for principle NFS/hostname at DOMAIN using keytab or ERROR: No credentials found for connection to server any help would be appreciated. I've been banging my head against a wall for a while now and may have damaged to many brain cells to see what's going wrong. -- James A. Peltier Systems Analyst (FASNet), VIVARIUM Technical Director HPC Coordinator Simon Fraser University - Burnaby Campus Phone : 778-782-6573 Fax : 778-782-3045 E-Mail : jpeltier at sfu.ca Website : http://www.fas.sfu.ca | http://vivarium.cs.sfu.ca http://blogs.sfu.ca/people/jpeltier MSN : subatomic_spam at hotmail.com Gravity is a myth. The world just sucks!