[OpenAFS] Borderline offtopic: OpenAFS as ~ for Samba AD?

[Jeffrey E Altman]

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On 2/15/2020 7:55 AM, M=C3=A5ns Nilsson wrote:
> Subject: Re: [OpenAFS] Borderline offtopic: OpenAFS as ~ for Samba AD? =
Date: Mon, Jan 20, 2020 at 04:42:24PM -0500 Quoting Jeffrey E Altman (jal=
tman@auristor.com):
>> No need for cross-realm.=C2=A0 Create an afs/cell@SAMBA4.REALM service=
 principal
>> with a kvno
>> that differs from the afs/cell@HEIMDAL.REALM service principal and add=
 the
>> key to your
>> AFS servers as well as adding both realm names to the AFS servers' krb=
=2Econf.
>=20
> Thanks!=20
>=20
> I've finally mustered enough bravery to tackle this.  Would proper DNS
> find-a-bility for Kerberos serve as complete substitute for "as adding
> both realm names to the AFS servers' krb.conf" ?

NO! The list of realms in the krb.conf are used to specify which realms
will be chopped off the authenticated principal name so there will be a
match with protection service user or group entries.

Kerberos DNS SRV records are used by clients to find the Kerberos KDCs
for the realm.  The AFS servers never contact the KDCs themselves.

> I've added the afs/cell@SAMBA4.REALM principals, with identical keytype=
s
> and different kvno to the rxkad.keytab on all my servers, restarted
> processes on them.
>=20
> After having fixed the krb5.conf for Heimdal on the Windows clients to
> point to the right domain, I can login without delay.
>=20
> I've mapped my home directory in AFS to H:\ and that's where I end up
> when logging in, and I have a token issued for user@SAMBA4.REALM in my
> cell. But it is not giving me any rights. =20
>=20
> I suspect I must map my SAMBA4.REALM user to rights management in my ce=
ll,
> some way. Or is there some magic I'm missing?

The is what the AFS krb.conf is for.  All of the local authentication
realms must be listed there and the servers restarted for the change to
take effect.

> I've tried adding user@samba4.realm to various pts entities like groups=

> and the list of users, but no such luck; I'get error messages
> (no such user for group or acl membership, "badly formed name" for
> user creation). I'm on way too old software versions in my cell, of
> course. Would upgrading help?
You only would create a system:authuser@smab4.realm group and then
create <user>@samb4.realm entries if you were treating the two sets of
identifies as unique.

Jeffrey Altman


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fn:Jeffrey Altman
n:Altman;Jeffrey
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adr:;;255 W 94TH ST STE 6B;New York;NY;10025-6985;United States
email;internet:jaltman@auristor.com
title:CEO
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