On 05/30/2014 08:23 PM, tizo wrote:
On Fri, May 30, 2014 at 6:40 PM, Dmitri Pal <d...@redhat.com
On 05/30/2014 05:00 PM, tizo wrote:
From: Alexander Bokovoy <abokovoy redhat com>
To: Sumit Bose <sbose redhat com>
Cc: freeipa-users redhat com
Subject: Re: [Freeipa-users] Trust services
Date: Thu, 29 May 2014 02:47:38 -0400 (EDT)
----- Original Message -----
> On Wed, May 28, 2014 at 10:47:13AM -0300, tizo wrote:
> > I would like to know, if having configured trusts services
> > and Active Directory, allow AD users to authenticate in
services that are
> > only configured to authenticate against FreeIPA.
> > For example, having configured the trusts, if I have a mail
server that is
> > using FreeIPA as its authentication method, can a user A from
> > Directory, who does not exist in FreeIPA, authenticate in the
> It depends a bit on how the users authenticate exactly because IPA
> offers Kerberos and LDAP authentication.
> Kerberos should work out of the box because thats one of the trusts
> components, trusting Kerberos tickets from the other domain/realm.
> For LDAP authentication you should be able to find the users
> trusted domain in the compat tree below
> cn=compat,dc=your,dc=ipa,dc=domain . To authenticate the user
> do a LDAP bind with the DN form the compat tree and the
password used in
Please note that the latter is valid only for FreeIPA 3.3 and later.
FreeIPA 3.0 does not support authentication over LDAP in the
/ Alexander Bokovoy
Ok. I will definitively use Kerberos. But looking at the diagram
of page 22 in
I see that SSSD in the GNU/Linux host is authenticating against
both Active Directory and FreeIPA. Does the email server that I
mentioned before, have to be configured in a similar way that
SSSD in the GNU/Linux host of the example? Or is just enough that
it is configured against the FreeIPA Kerberos and nothing else?.
You configure client (SSSD) to point to IPA but it will discover
that IPA is in trust relations and would know how to deal with
tickets coming from AD side.
This is why there are two arrows. They show communication.
Ok. And what about a mail server?. We are planning to use Zimbra, and
we want that users from both FreeIPA and AD use it. Could we just
configure it to authenticate against FreeIPA Kerberos?. Or do we have
to make something else?.
How do you plan to configure it? How can it be configured?
I assume we are talking about Zimbra web interface, right?
If Zimbra natively supports Kerberos then I would
1) Make Zimbra host system a member of the IPA domain
2) Make Zimbra a Kerberos service in IPA domain
3) Configure mod_auth_kerb or equivalent capbility for Zimbra to accept
4) Configure Zimbra to get account information from IPA compat tree -
this way AD and IPA users will be available to it via LDAP
5) In case there is no ticket Zimbra would prompt user for user name and
password and bind against IPA compat tree thus allowing authentication
for IPA and trusted users.
In future when the world is old and wise I hope something like this 
would be possible with Zimbra too.
Sr. Engineering Manager IdM portfolio
Red Hat, Inc.
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