From: Julius <commercials@gmx.net>
Subject: Re: nfs4 with sec=krb5, mount times out
Date: Mon, 26 Jan 2009 20:22:02 +0100
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Cc: NFS list <linux-nfs@vger.kernel.org>
To: Kevin Coffman <kwc@citi.umich.edu>
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On Mon, 2009-01-26 at 13:59 -0500, Kevin Coffman wrote:
> On Mon, Jan 26, 2009 at 1:24 PM, Julius <commercials@gmx.net> wrote:
> > Hi,
> >
> >
> > i can mount my nfsv4 share without kerberos security without
> > problems.../etc/fstab:
> >
> > night_crawler.localdomain.de:/music /home/metalfan/nfs4-mount   nfs4    user
> > 0       0
> >
> >
> > but adding "sec=krb5" to the options list results in:
> >
> >
> > mount -v nfs4-mount/
> > mount.nfs4: timeout set for Mon Jan 26 15:44:05 2009
> > mount.nfs4: text-based options:
> > 'sec=krb5,clientaddr=141.x.x.x,addr=141.x.x.x
> > mount.nfs4: mount(2): Connection timed out
> >
> >
> > I read somewhere on the mailing list that only des-cbc-crc is supported
> > for nfs4, its the only keytype for my user metalfan.
> > "kinit metalfan" was run before attempting to mount.
> > i can use gssapi to connect to night_crawlers sshd with my local user,
> > which also does the nfs4 mount.
> >
> > krb5-kdc.log and krb5-default.log do not show any connections.
> > Where do you start troubleshooting?
> 
> First step would be to verify that rpc.gssd is running on your client
> machine, and rpc.svcgssd is running on your server machine.
> You need to generate a keytab for your server (with only a des-cbc-crc
> key).  (nfs/<f.q.h.n>@<REALM>)
> You likely need to generate a keytab for your client as well.
> 
> If all those are done, send output of rpc.gssd and rpc.svcgssd
> (running with option -vvv).
> 
> I would point you at our FAQ page, but the web server is sadly still
> down at the moment.
> 
> K.C.

the nfs/... entry was missing, so i added:
nfs/night_crawler.localdomain.de-jgXV7fHVA4Rbjp6DLoyPiQ@public.gmane.org
with the des-cbc-crc as only enc type.

but still rpc.svcgssd fails with:
ERROR: GSS-API: error in gss_acquire_cred():  No credentials were
supplied, or the credentials were unavailable or inaccessible. - unknown
mech-code 0 for mech unknown
Unable to obtain credentials for 'nfs'
unable to obtain root (machine) credentials
do you have a keytab entry for nfs/<your.host>@<YOUR.REALM>
in /etc/krb5.keytab?


Julius