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Alexander Bokovoy
abb6384875
There are two ways for maintaining user principal names (UPNs) in Active
Directory:
- associate UPN suffixes with the forest root and then allow for each
user account to choose UPN suffix for logon
- directly modify userPrincipalName attribute in LDAP
Both approaches lead to the same result: AD DC accepts user@UPN-Suffix
as a proper principal in AS-REQ and TGS-REQ.
The latter (directly modify userPrincipalName) case has a consequence
that this UPN suffix is not visible via netr_DsRGetForestTrustInformation
DCE RPC call. As result, FreeIPA KDC will not know that a particular UPN
suffix does belong to a trusted Active Directory forest. As result, SSSD
will not be able to authenticate and validate this user from a trusted
Active Directory forest.
This is especially true for one-word UPNs which otherwise wouldn't work
properly on Kerberos level for both FreeIPA and Active Directory.
Administrators are responsible for amending the list of UPNs associated
with the forest in this case. With this commit, an option is added to
'ipa trust-mod' that allows specifying arbitrary UPN suffixes to a
trusted forest root.
As with all '-mod' commands, the change replaces existing UPNs when
applied, so administrators are responsible to specify all of them:
ipa trust-mod ad.test --upn-suffixes={existing.upn,another_upn,new}
Fixes: https://pagure.io/freeipa/issue/7015
Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>
FreeIPA Server
FreeIPA allows Linux administrators to centrally manage identity, authentication and access control aspects of Linux and UNIX systems by providing simple to install and use command line and web based managment tools.
FreeIPA is built on top of well known Open Source components and standard protocols with a very strong focus on ease of management and automation of installation and configuration tasks.
FreeIPA can seamlessly integrate into an Active Directory environment via cross-realm Kerberos trust or user synchronization.
Benefits
FreeIPA:
- Allows all your users to access all the machines with the same credentials and security settings
- Allows users to access personal files transparently from any machine in an authenticated and secure way
- Uses an advanced grouping mechanism to restrict network access to services and files only to specific users
- Allows central management of security mechanisms like passwords, SSH Public Keys, SUDO rules, Keytabs, Access Control Rules
- Enables delegation of selected administrative tasks to other power users
- Integrates into Active Directory environments
Components
The FreeIPA project provides unified installation and management tools for the following components:
- LDAP Server - based on the 389 project
- KDC - based on MIT Kerberos implementation
- PKI based on Dogtag project
- Samba libraries for Active Directory integration
- DNS Server based on BIND and the Bind-DynDB-LDAP plugin
Project Website
Releases, announcements and other information can be found on the IPA server project page at http://www.freeipa.org/ .
Documentation
The most up-to-date documentation can be found at http://freeipa.org/page/Documentation .
Quick Start
To get started quickly, start here: http://www.freeipa.org/page/Quick_Start_Guide
Licensing
Please see the file called COPYING.
Contacts
- If you want to be informed about new code releases, bug fixes, security fixes, general news and information about the IPA server subscribe to the freeipa-announce mailing list at https://www.redhat.com/mailman/listinfo/freeipa-interest/ .
- If you have a bug report please submit it at: https://pagure.io/freeipa/issues
- If you want to participate in actively developing IPA please subscribe to the freeipa-devel mailing list at https://www.redhat.com/mailman/listinfo/freeipa-devel/ or join us in IRC at irc://irc.freenode.net/freeipa