Re: Trouble mounting from EL5.5 server on Fedora 14 - gss_kerberos_mech: unsupported algorithm 6

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On 01/04/2011 11:37 AM, Kevin Coffman wrote:
On Tue, Jan 4, 2011 at 12:27 PM, Orion Poplawski<orion@xxxxxxxxxxxxx>  wrote:
I'm trying to get kerberized NFSv4 setup for the first time (have had
non-secure v4 up for a while).  Client is Fedora 14, server is CentOS 5.5.

[ ... ]

keytabs on server and client are like:

   3 nfs/orca.cora.nwra.com@xxxxxxxxxxxxx (Triple DES cbc mode with
HMAC/sha1)
   3 nfs/orca.cora.nwra.com@xxxxxxxxxxxxx (ArcFour with HMAC/md5)
   3 nfs/orca.cora.nwra.com@xxxxxxxxxxxxx (DES with HMAC/sha1)
   3 nfs/orca.cora.nwra.com@xxxxxxxxxxxxx (DES cbc mode with RSA-MD5)

Any ideas?

Only DES is supported for your server's kernel:

http://www.citi.umich.edu/projects/nfsv4/linux/krb5-setup.html

Indeed, it does work if I limit the keys to DES only (des-hmac-sha1:normal,des-cbc-md5:normal). Although I had seen at least one report that using ktadd -e des-cbc-crc:normal was no longer necessary as of 5.2:

http://sadiquepp.blogspot.com/2009/02/how-to-configure-nfsv4-with-kerberos-in.html

--
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA/CoRA Division                    FAX: 303-415-9702
3380 Mitchell Lane                  orion@xxxxxxxxxxxxx
Boulder, CO 80301              http://www.cora.nwra.com
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