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e95a7b1b8d
Enables support for trusted domains users for old clients through Schema Compatibility plugin. SSSD supports trusted domains natively starting with version 1.9 platform. For platforms that lack SSSD or run older SSSD version one needs to use this option. When enabled, slapi-nis package needs to be installed and schema-compat-plugin will be configured to provide lookup of users and groups from trusted domains via SSSD on IPA server. These users and groups will be available under cn=users,cn=compat,$SUFFIX and cn=groups,cn=compat,$SUFFIX trees. SSSD will normalize names of users and groups to lower case. In addition to providing these users and groups through the compat tree, this option enables authentication over LDAP for trusted domain users with DN under compat tree, i.e. using bind DN uid=administrator@ad.domain,cn=users,cn=compat,$SUFFIX. This authentication is related to PAM stack using 'system-auth' PAM service. If you have disabled HBAC rule 'allow_all', then make sure there is special service called 'system-auth' created and HBAC rule to allow access to anyone to this rule on IPA masters is added. Please note that system-auth PAM service is not used directly by any other application, therefore it is safe to create one specifically to support trusted domain users via compatibility path. https://fedorahosted.org/freeipa/ticket/3567