nfs4 keytabs [was:Re: where can I ask user qns about nfs4]?

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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.

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.

And yes, we found out very early on that idmapd had to be running at both ends.

Thanks for the reply. You've got me thinking.
Steve
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