![]() ![]() It can be explicitly configured by adding the following setting in your elasticsearch.yml file: If you configure TLS on the HTTP interface, this service is automatically enabled. The Elasticsearch Kerberos implementation makes use of the Elasticsearch token service. It is not required for Kerberos authentication directly against the Elasticsearch Rest API. This step is necessary to support Kerberos authentication via Kibana. For more information, see Encrypting HTTP client communications. If your Elasticsearch cluster is operating in production mode, you must configure the HTTP interface to use SSL/TLS before you can enable Kerberos authentication. Refer to your Kerberos documentation to configure the nf file.įor more information on Java GSS, see Java GSS Kerberos requirements The configuration requirements depend on your Kerberos setup. A keytab file that contains credentials for the Elasticsearch service principal.To support Kerberos authentication, Elasticsearch needs the following files: For more information, see MIT Kerberos documentationĮlasticsearch uses Java GSS framework support for Kerberos authentication. Where examples are provided, they pertain to an MIT Kerberos V5 deployment. These instructions do not cover setting up and configuring your Kerberos deployment. ![]() Refer to your Kerberos documentation for more details. Kerberos requires a lot of external services to function properly, such as time synchronization between all machines and working forward and reverse DNS mappings in your domain. You must have the Kerberos infrastructure set up in your environment. Elasticsearch clients must first obtain a TGT then initiate the process of authenticating with Elasticsearch. Refer to your Kerberos installation documentation for more information about obtaining TGT. ![]() This ticket is then presented to the service for authentication. In Kerberos, users authenticate with an authentication service and later with a ticket granting service to generate a TGT (ticket-granting ticket). In this scenario, clients must present Kerberos tickets for authentication. You can configure Elasticsearch to use the Kerberos V5 authentication protocol, which is an industry standard protocol, to authenticate users. Kerberos is used to protect services and uses a ticket-based authentication protocol to authenticate users. An example of a typical user principal is An example of a typical service principal is define the administrative boundary within which the authentication server has authority to authenticate users and services.Ī file that stores pairs of principals and encryption keys.Īnyone with read permissions to this file can use the credentials in the network to access other services so it is important to protect it with proper file permissions.Ī file that contains Kerberos configuration information such as the default realm name, the location of Key distribution centers (KDC), realms information, mappings from domain names to Kerberos realms, and default configurations for realm session key encryption types.Ī TGT is an authentication ticket generated by the Kerberos authentication server. Usually it is is the domain name in upper case. For a user, usually it is not used for service hosts, it is the fully qualified domain name of the host. Instance is an optional string that qualifies the primary and is separated by a slash( /) from the primary. Kerberos V5 principal names are of format where primary is a user name. It can be used to identify a user or a service provided by a server. A service that issues Kerberos tickets.Ī Kerberos principal is a unique identity to which Kerberos can assign tickets. There are a few terms and concepts that you’ll encounter when you’re setting up Kerberos realms: For more information on realm settings, see Kerberos realm settings. To authenticate users with Kerberos, you need to configure a Kerberos realm and map users to roles. You cannot use the Kerberos realm to authenticate on the transport network layer. You can configure the Elastic Stack security features to support Kerberos V5 authentication, an industry standard protocol to authenticate users in Elasticsearch. ![]()
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