domain_realm, hostname to realm mapping, what programs/services is this necessary for?

"Christian, Mark" <[email protected]>
Newsgroups gmane.comp.encryption.kerberos.general
Message-ID <BL1PR11MB5512F3419D36B877C93752DA85709@BL1PR11MB5512.namprd11.prod.outlook.com>
I primarily use Kerberos with ssh gssapi-with-mic authentications, samba, and apache.  I don't believe I need to populate the [domain_realm] section with hostname/domainname mappings to realms, even though the domainname for the hosts differs from the Kerberos realm; these Kerberized services still work.  Or am I mistaken?  default_realm  is defined under [libdefaults], and dns_lookup_realm and dns_lookup_kdc are set to false.  The krb5.conf man page mentions that this mapping is necessary for some programs or services.  I'm wondering which services require this mapping?

Mark

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