Red Hat Summit8장. Configuring IdM clients in an Active Directory DNS domain
If you have client systems in a DNS domain controlled by Active Directory (AD) and you require those clients to join the IdM Server to benefit from its RHEL features, you can configure users to access a client using a host name from the AD DNS domain.
This configuration is not recommended and has limitations. Always deploy IdM clients in a DNS zone separate from the ones owned by AD and access IdM clients using their IdM host names.
Your IdM client configuration depends on whether you require single sign-on with Kerberos.
8.1. Configuring an IdM client without Kerberos single sign-on
Password authentication is the only authentication method that is available for users to access resources on IdM clients if the IdM clients are in an Active Directory DNS domain. Follow this procedure to configure your client without Kerberos single sign-on.
Procedure
Install the IdM client with the
--domain=IPA_DNS_Domainoption to ensure the System Security Services Daemon (SSSD) can communicate with the IdM servers:[root@idm-client.ad.example.com ~]# ipa-client-install --domain=idm.example.comThis option disables the SRV record auto-detection for the Active Directory DNS domain.
Open the
/etc/krb5.confconfiguration file and locate the existing mapping for the Active Directory domain in the[domain_realm]section..ad.example.com = IDM.EXAMPLE.COM ad.example.com = IDM.EXAMPLE.COMReplace both lines with an entry mapping the fully qualified domain name (FQDN) of the Linux clients in the Active Directory DNS zone to the IdM realm:
idm-client.ad.example.com = IDM.EXAMPLE.COMBy replacing the default mapping, you prevent Kerberos from sending its requests for the Active Directory domain to the IdM Kerberos Distribution Center (KDC). Instead Kerberos uses auto-discovery through SRV DNS records to locate the KDC.
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