Re: [nfsv4] AUTH_GSS for Callbacks

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From: Nicolas Williams (Nicolas.Williams@sun.com)
Date: 10/29/03-05:27:02 PM Z


From: Nicolas Williams <Nicolas.Williams@sun.com>
Subject: Re: [nfsv4] AUTH_GSS for Callbacks
Message-ID: <20031029232702.GE24528@binky.central.sun.com>
Date: Wed, 29 Oct 2003 15:27:02 -0800

On Wed, Oct 29, 2003 at 06:18:46PM -0500, wurzl, mario wrote:
Mike> When the server does the call back, the target and initiator 
Mike> principals are simply reversed. The initiator principal is 
Mike> nfs@<fqdn of server host>, and the target principal is 
Mike> root/<fqdn of client host>.
> 
> This implies that a system administrator will have to generate keys for a
> service 'root@client' and store it in the Kerberos keytab of all client
> systems. I have a hard time imagining a system administrator doing this
> process for a network with several thousand clients.
> It may become even worse if the principal for SETCLIENTID could be any user.

Multi-user clients are all pretty much going to need to have a Kerberos
V host-based principal and key(s), unless they never authenticate users
logging in to them (no kerberized telnet, no Kerberos password
validation, etc...).  So if you have a client that has the typical
"host@fqdn" principal then that's enough and you should not need to have
a root@fqdn" principal also.  (Yes, I know, Solaris clients insist on
having a root@fqdn principal.)

Cheers,

Nico
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