sssd-krb5 5 File Formats and Conventions sssd-krb5 the configuration file for SSSD This manual page describes the configuration of the Kerberos 5 authentication backend for sssd 8 . For a detailed syntax reference, please refer to the FILE FORMAT section of the sssd.conf 5 manual page If the auth-module krb5 is used in a SSSD domain, the following options must be used. See the sssd.conf 5 manual page, section DOMAIN SECTIONS for details on the configuration of a SSSD domain. krb5KDCIP (string) Specifies the IP address of the Kerberos server. krb5REALM (string) The name of the Kerberos realm. krb5try_simple_upn (boolean) Set this option to 'true' if an User Principle Name (UPN) cannot be found in sysdb and you want to use an UPN like 'username@realm'. Default: false The following example assumes that SSSD is correctly configured and FOO is one of the domains in the [domains] section. [domains/FOO] auth-module = krb5 krb5KDCIP = 192.168.1.1 krb5REALM = EXAMPLE.COM sssd.conf5 , sssd8