Kerberos

Below is an example and description of configuring a Login Identity Provider that integrates with a Kerberos Key Distribution Center (KDC) to authenticate users.

Set the following in nifi.properties to enable Kerberos username/password authentication:

nifi.security.user.login.identity.provider=kerberos-provider

Modify login-identity-providers.xml to enable the kerberos-provider. Here is the sample provided in the file:

<provider>
    <identifier>kerberos-provider</identifier>
    <class>org.apache.nifi.kerberos.KerberosProvider</class>
    <property name="Default Realm">NIFI.APACHE.ORG</property>
    <property name="Authentication Expiration">12 hours</property>
</provider>

The kerberos-provider has the following properties:


Property Name	Description
`Authentication Expiration`	The duration of how long the user authentication is valid for. If the user never logs out, they will be required to log back in following this duration.
`Default Realm`	Default realm to provide when user enters incomplete user principal (i.e. `NIFI.APACHE.ORG`).

	Note
	For changes to nifi.properties and login-identity-providers.xml to take effect, NiFi needs to be restarted. If NiFi is clustered, configuration files must be the same on all nodes.