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12.4. Caching Kerberos Passwords

A machine may not always be on the same network as the FreeIPA domain; for example, a machine may need to be logged into a VPN before it can access the FreeIPA domain. If a user logs into a system when it is offline and then later attempts to connect to FreeIPA services, then the user is blocked because there is no FreeIPA Kerberos ticket for that user. FreeIPA works around that limitation by using SSSD to store the Kerberos passwords in the SSSD cache.
This is configured by default by the ipa-client-install script. A configuration parameter is added to the /etc/sssd/sssd.conf file which specifically instructs SSSD to store those Kerberos passwords for the FreeIPA domain:
cache_credentials = True
ipa_domain =
id_provider = ipa
auth_provider = ipa
access_provider = ipa
chpass_provider = ipa
ipa_server = _srv_,
krb5_store_password_if_offline = true
This default behavior can be disabled during the client installation by using the --no-krb5-offline-passwords option.
This behavior can also be disabled by editing the /etc/sssd/sssd.conf file and removing the krb5_store_password_if_offline line or changing its value to false.
krb5_store_password_if_offline = false
The SSSD configuration options for Kerberos authentication is covered in the "Configuring Domains" section of the SSSD chapter in the Red Hat Enterprise Linux Deployment Guide.