I was trying kerberized CIFS access with a cluster
Although smbclient -k worked fine with it, mount.cifs failed with the following error

[root@client01 ~]# mount -t cifs //192.168.121.41/failover /mnt -osec=krb5,user=userr -vv

mount.cifs kernel mount options: unc=//192.168.121.41\failover,ver=1,rw,sec=krb5,user=userr,ip=192.168.121.41
mount error(126): Required key not available
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)


Thought maybe it needs a ticket before mount so acquired a ticket as well
[root@client01 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: testuser@LUVSHINES.COM
Valid starting Expires Service principal
06/17/10 15:10:59 06/18/10 15:10:42 krbtgt/LUVSHINES.COM@LUVSHINES.COM
06/17/10 15:14:06 06/18/10 15:10:42 host/tiger@LUVSHINES.COM

But the command failed with the same error. The server had the principles added with short name
[root@tiger.mac01 ~]# klist -kte | grep tiger | grep cifs
3 05/12/10 23:36:13 cifs/tiger@LUVSHINES.COM (DES with HMAC/sha1)
3 05/12/10 23:36:13 cifs/tiger@LUVSHINES.COM (DES cbc mode with RSA-MD5)
3 05/12/10 23:36:13 cifs/tiger@LUVSHINES.COM (Triple DES cbc mode with HMAC/sha1)

Any suggestions ??

Found references on the net that it is broken by design
smbclient works but CIFS mount won't work if the netbios name is different from host name

Marking it SOLVED

Hey, I think I have the same problem ...

i get a Kerberos ticket


kinit mburger
Password for mburger@SIAG.IT:

after them with klist i got

klist
Ticket cache: FILE:/tmp/krb5cc_1000
Default principal: mburger@SIAG.IT

Valid starting Expires Service principal
01/31/11 11:23:47 01/31/11 21:23:56 krbtgt/SIAG.IT@SIAG.IT
renew until 02/01/11 11:23:47


i try to mount my shares and got errors

sudo mount -t cifs //siag.it/Data /mnt/data -osec=krb5,user=mburger -vv
mount.cifs kernel mount options: ip=10.240.19.14,unc=\\siag.it\Data,sec=krb5,ver=1,user=mburger,pass=********
mount error(126): Required key not available
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)


with klist -kte i got errors
klist -kte | grep mburger | grep cifs
klist: No such file or directory while starting keytab scan


can you help me?

The netbios name is part of the smb.conf under the global section. By default the netbios name is your hostname. Any changes made no difference to my outcome, however figuring out that the default netbios name is the hostname I was able to resolve my issue.I ran into an issue where I was running through an SSH tunnel
Connecting through a tunnel I was using my localhost to connect to attempt to mount the shared drive.
The error message I received was
The error message was the same as if the netbios name wasn't set properly, according to the original post.



To work around this I added the hostname as my local host to
as
Instead of connecting to 127.0.0.1 I then ran the mount.cifs to reflect the hostname





In regards to mburger, I received a similar error message when using klist with the switches you mentioned.
When using klist without the switches my ticket showed as expected.