On 02/03/2012 06:22 PM, steve wrote:
On 02/02/2012 07:57 PM, Tigran Mkrtchyan wrote:
On Thu, Feb 2, 2012 at 3:56 PM, steve<steve@xxxxxxxxxxxx> wrote:
On 02/02/12 14:29, steve wrote:
On 02/02/2012 02:05 PM, Tigran Mkrtchyan wrote:
On Thu, Feb 2, 2012 at 12:33 PM, steve<steve@xxxxxxxxxxxx> wrote:
On 02/02/12 11:58, Tigran Mkrtchyan wrote:
Hi Steve,
I already use nfs4 to serve my Linux clients. I'm going to
kerberize
it.
My
clients already have machine and host principals. What else do
they
need?
1. nfs/client.domain.name
2. nfs/server.domain/name
3. neither
4. both
We run kerberized NFS.
our keytab contains:
on server;
nfs/server.domain
on client:
nfs/client.domain
and, of course, you need a consistent idmap configuration.
Tigran.
Hi Tigran
That's what we have on our test lan at the moment. I can
understand that
the
server would need the service principal:
nfs/server.domain
but not the client, as it's not offering any kerberized service.
The mount step happens on behalf of host as there are no user
requests
yet.
Client host credentials are used at that time.
As an experiment, I removed the nfs/client.domain from a client
keytab,
rebooted and remounted the share. We could still access the
kerberized
nfs
share. Maybe there were still some tickets left somewhere? That
has me
really confused.
Huh! did you enforce kerberos in /etc/exports?
Yes. /etc/exports exports as gss/krb5
I made a screenshot:
http://3.bp.blogspot.com/-g40b11Ys_DA/TypYtlO-ixI/AAAAAAAAAIc/cZdeRhnVuY4/s1600/s4all.png
That's why I'm confused.
Steve
Digging a bit further, here is the output of mount on the client:
http://dl.dropbox.com/u/45150875/krb5testnfs.png
And this appears immediately after the mount:
http://dl.dropbox.com/u/45150875/krb5nfstmp.png
Most of the documentation tells you to stick nfs into the client
keytab as
well as the server keytab, but here, I only have the principal on the
server.
What am I missing?
I think client simply falls back to 'host' if nfs entry is not
available.
Tigran.
Yep. You're right. And not just host. They changed it to look for other
keys too:
http://linux.die.net/man/8/rpc.gssd
So in my case that's why I see HOSTNAME$@REALM during the nfs mount.
Thanks so much for your time.
Steve
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