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Security settings in Elasticsearch

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Security settings in Elasticsearch

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You configure xpack.security settings to enable anonymous access and perform message authentication, set up document and field level security, configure realms, encrypt communications with SSL,and audit security events.

All of these settings can be added to the elasticsearch.yml configuration file, with the exception of the secure settings, which you add to the Elasticsearch keystore. For more information about creating and updating the Elasticsearch keystore, see Secure settings.

General security settings

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xpack.security.enabled

(Static) Defaults to true, which enables Elasticsearch security features on the node.

If set to false, security features are disabled, which is not recommended. It also affects all Kibana instances that connect to this Elasticsearch instance; you do not need to disable security features in those kibana.yml files. For more information about disabling security features in specific Kibana instances, see Kibana security settings.

xpack.security.autoconfiguration.enabled

(Static) Defaults to true, which enables security auto configuration.

If set to false, security auto configuration is disabled, which is not recommended. When disabled, security is not configured automatically when starting Elasticsearch for the first time, which means that you must manually configure security.

xpack.security.enrollment.enabled

(Static) Defaults to false. Controls enrollment (of nodes and Kibana) to a local node that’s been autoconfigured for security. When set to true, the local node can generate new enrollment tokens. Existing tokens can be used for enrollment if they are still valid.

The security autoconfiguration process will set this to true unless an administrator sets it to false before starting Elasticsearch.

xpack.security.hide_settings

(Static) A comma-separated list of settings that are omitted from the results of the cluster nodes info API. You can use wildcards to include multiple settings in the list. For example, the following value hides all the settings for the ad1 active_directory realm: xpack.security.authc.realms.active_directory.ad1.*. The API already omits all ssl settings, bind_dn, and bind_password due to the sensitive nature of the information.

xpack.security.fips_mode.enabled

(Static) Enables fips mode of operation. Set this to true if you run this Elasticsearch instance in a FIPS 140-2 enabled JVM. For more information, see FIPS 140-2. Defaults to false.

Password hashing settings

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xpack.security.authc.password_hashing.algorithm: (Static) Specifies the hashing algorithm that is used for secure user credential storage. See Table 2, “Password hashing algorithms”. If xpack.security.fips_mode.enabled is true (see FIPS 140-2), defaults to pbkdf2_stretch. In all other cases, defaults to bcrypt.

Anonymous access settings

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You can configure the following anonymous access settings in elasticsearch.yml. For more information, see Enabling anonymous access.

xpack.security.authc.anonymous.username: (Static) The username (principal) of the anonymous user. Defaults to _es_anonymous_user.
xpack.security.authc.anonymous.roles: (Static) The roles to associate with the anonymous user. Required.
xpack.security.authc.anonymous.authz_exception: (Static) When true, an HTTP 403 response is returned if the anonymous user does not have the appropriate permissions for the requested action. The user is not prompted to provide credentials to access the requested resource. When set to false, an HTTP 401 response is returned and the user can provide credentials with the appropriate permissions to gain access. Defaults to true.

Automata Settings

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In places where the security features accept wildcard patterns (e.g. index patterns in roles, group matches in the role mapping API), each pattern is compiled into an Automaton. The follow settings are available to control this behaviour.

xpack.security.automata.max_determinized_states: (Static) The upper limit on how many automaton states may be created by a single pattern. This protects against too-difficult (e.g. exponentially hard) patterns. Defaults to 100,000.
xpack.security.automata.cache.enabled: (Static) Whether to cache the compiled automata. Compiling automata can be CPU intensive and may slowdown some operations. The cache reduces the frequency with which automata need to be compiled. Defaults to true.
xpack.security.automata.cache.size: (Static) The maximum number of items to retain in the automata cache. Defaults to 10,000.
xpack.security.automata.cache.ttl: (Static) The length of time to retain in an item in the automata cache (based on most recent usage). Defaults to 48h (48 hours).

Document and field level security settings

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You can set the following document and field level security settings in elasticsearch.yml. For more information, see Setting up field and document level security.

xpack.security.dls_fls.enabled: (Static) Set to false to prevent document and field level security from being configured. Defaults to true.
xpack.security.dls.bitset.cache.ttl: (Static) The time-to-live for cached BitSet entries for document level security. Document level security queries may depend on Lucene BitSet objects, and these are automatically cached to improve performance. Defaults to expire entries that are unused for 2h (2 hours).
xpack.security.dls.bitset.cache.size: (Static) The maximum memory usage of cached BitSet entries for document level security. Document level security queries may depend on Lucene BitSet objects, and these are automatically cached to improve performance. Can be configured as a raw number of bytes (such as 200mb or 1g) or a percentage of the node’s JVM heap memory (such as 5%). When the default value is exceeded, the least recently used entries are evicted. Defaults to 10% of the heap assigned to the node.

Token service settings

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You can set the following token service settings in elasticsearch.yml.

xpack.security.authc.token.enabled: (Static) Set to false to disable the built-in token service. Defaults to true unless xpack.security.http.ssl.enabled is false. This prevents sniffing the token from a connection over plain http.
xpack.security.authc.token.timeout: (Static) The length of time that a token is valid for. By default this value is 20m or 20 minutes. The maximum value is 1 hour.

API key service settings

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You can set the following API key service settings in elasticsearch.yml.

xpack.security.authc.api_key.enabled: (Static) Set to false to disable the built-in API key service. Defaults to true.
xpack.security.authc.api_key.hashing.algorithm: (Static) Specifies the hashing algorithm that is used for securing API key credentials. See Table 2, “Password hashing algorithms”. Defaults to pbkdf2.
xpack.security.authc.api_key.cache.ttl: (Static) The time-to-live for cached API key entries. A API key id and a hash of its API key are cached for this period of time. Specify the time period using the standard Elasticsearch time units. Defaults to 1d.
xpack.security.authc.api_key.cache.max_keys: (Static) The maximum number of API key entries that can live in the cache at any given time. Defaults to 10,000.
xpack.security.authc.api_key.cache.hash_algo: (Static, Expert) The hashing algorithm that is used for the in-memory cached API key credentials. For possible values, see Table 1, “Cache hash algorithms”. Defaults to ssha256.

Security domain settings

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You configure security domain settings in the xpack.security.authc.domains namespace in elasticsearch.yml.

For example:

xpack:
  security:
    authc:
      domains:
        my_domain: 
          realms: [ 'default_native', 'saml1' ]

	Specifies the name of the security domain
	Specifies the realms that belong to the domain

Realm settings

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You configure realm settings in the xpack.security.authc.realms namespace in elasticsearch.yml.

For example:

xpack.security.authc.realms:

    native.realm1: 
        order: 0 
        ...

    ldap.realm2:
        order: 1
        ...

    active_directory.realm3:
        order: 2
        ...
    ...

	Specifies the type of realm (for example, `native`, `ldap`, `active_directory`, `pki`, `file`, `kerberos`, `saml`) and the realm name. This information is required.
	Specifies priority of a realm in the realm chain. This information is required.

The valid settings vary depending on the realm type. For more information, see User authentication.

Settings valid for all realms

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order: (Static) The priority of the realm within the realm chain. Realms with a lower order are consulted first. The value must be unique for each realm. This setting is required.
enabled: (Static) Indicates whether a realm is enabled. You can use this setting to disable a realm without removing its configuration information. Defaults to true.

Native realm settings

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In addition to the settings that are valid for all realms, you can specify the following optional settings:

cache.ttl: (Static) The time-to-live for cached user entries. A user and a hash of its credentials are cached for this period of time. Specify the time period using the standard Elasticsearch time units. Defaults to 20m.
cache.max_users: (Static) The maximum number of user entries that can live in the cache at any given time. Defaults to 100,000.
cache.hash_algo: (Static, Expert) The hashing algorithm that is used for the in-memory cached user credentials. For possible values, see Table 1, “Cache hash algorithms”. Defaults to ssha256.
authentication.enabled: (Static) If set to false, disables authentication support in this realm, so that it only supports user lookups. (See the run as and authorization realms features). Defaults to true.

File realm settings

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In addition to the settings that are valid for all realms, you can specify the following settings:

cache.ttl: (Static) The time-to-live for cached user entries. A user and a hash of its credentials are cached for this configured period of time. Defaults to 20m. Specify values using the standard Elasticsearch time units. Defaults to 20m.
cache.max_users: (Static) The maximum number of user entries that can live in the cache at a given time. Defaults to 100,000.
cache.hash_algo: (Static, Expert) The hashing algorithm that is used for the in-memory cached user credentials. See Table 1, “Cache hash algorithms”. Defaults to ssha256.
authentication.enabled: (Static) If set to false, disables authentication support in this realm, so that it only supports user lookups. (See the run as and authorization realms features). Defaults to true.

LDAP realm settings

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In addition to the Settings valid for all realms, you can specify the following settings:

url

(Static) One or more LDAP URLs in the ldap[s]://<server>:<port> format. Required.

To provide multiple URLs, use a YAML array (["ldap://server1:636", "ldap://server2:636"]) or comma-separated string ("ldap://server1:636, ldap://server2:636").

While both are supported, you can’t mix the ldap and ldaps protocols.

load_balance.type

(Static) The behavior to use when there are multiple LDAP URLs defined. For supported values see load balancing and failover types. Defaults to failover.

load_balance.cache_ttl

(Static) When using dns_failover or dns_round_robin as the load balancing type, this setting controls the amount of time to cache DNS lookups. Defaults to 1h.

bind_dn

(Static) The DN of the user that is used to bind to the LDAP and perform searches. Only applicable in user search mode. If not specified, an anonymous bind is attempted. Defaults to Empty. Due to its potential security impact, bind_dn is not exposed via the nodes info API.

bind_password

(Static) [6.3] Deprecated in 6.3. Use secure_bind_password instead. The password for the user that is used to bind to the LDAP directory. Defaults to Empty. Due to its potential security impact, bind_password is not exposed via the nodes info API.

secure_bind_password

(Secure) The password for the user that is used to bind to the LDAP directory. Defaults to Empty.

user_dn_templates

(Static) The DN template that replaces the user name with the string {0}. This setting is multivalued; you can specify multiple user contexts. Required to operate in user template mode. If user_search.base_dn is specified, this setting is not valid. For more information on the different modes, see LDAP user authentication.

authorization_realms

(Static) The names of the realms that should be consulted for delegated authorization. If this setting is used, then the LDAP realm does not perform role mapping and instead loads the user from the listed realms. The referenced realms are consulted in the order that they are defined in this list. See Delegating authorization to another realm.

If any settings starting with user_search are specified, the user_dn_templates settings are ignored.

user_group_attribute

(Static) Specifies the attribute to examine on the user for group membership. If any group_search settings are specified, this setting is ignored. Defaults to memberOf.

user_search.base_dn

(Static) Specifies a container DN to search for users. Required to operated in user search mode. If user_dn_templates is specified, this setting is not valid. For more information on the different modes, see LDAP user authentication.

user_search.scope

(Static) The scope of the user search. Valid values are sub_tree, one_level or base. one_level only searches objects directly contained within the base_dn. sub_tree searches all objects contained under base_dn. base specifies that the base_dn is the user object, and that it is the only user considered. Defaults to sub_tree.

user_search.filter

(Static) Specifies the filter used to search the directory in attempts to match an entry with the username provided by the user. Defaults to (uid={0}). {0} is substituted with the username provided when searching.

user_search.attribute

(Static) [5.6] Deprecated in 5.6. Use user_search.filter instead. The attribute to match with the username sent with the request. Defaults to uid.

user_search.pool.enabled

(Static) Enables or disables connection pooling for user search. If set to false, a new connection is created for every search. The default is true when bind_dn is set.

user_search.pool.size

(Static) The maximum number of connections to the LDAP server to allow in the connection pool. Defaults to 20.

user_search.pool.initial_size

(Static) The initial number of connections to create to the LDAP server on startup. Defaults to 0. If the LDAP server is down, values greater than 0 could cause startup failures.

user_search.pool.health_check.enabled

(Static) Enables or disables a health check on LDAP connections in the connection pool. Connections are checked in the background at the specified interval. Defaults to true.

user_search.pool.health_check.dn

(Static) The distinguished name that is retrieved as part of the health check. Defaults to the value of bind_dn if present; if not, falls back to user_search.base_dn.

user_search.pool.health_check.interval

(Static) The interval to perform background checks of connections in the pool. Defaults to 60s.

group_search.base_dn

(Static) The container DN to search for groups in which the user has membership. When this element is absent, Elasticsearch searches for the attribute specified by user_group_attribute set on the user in order to determine group membership.

group_search.scope

(Static) Specifies whether the group search should be sub_tree, one_level or base. one_level only searches objects directly contained within the base_dn. sub_tree searches all objects contained under base_dn. base specifies that the base_dn is a group object, and that it is the only group considered. Defaults to sub_tree.

group_search.filter

(Static) Specifies a filter to use to look up a group. When not set, the realm searches for group, groupOfNames, groupOfUniqueNames, or posixGroup with the attributes member, memberOf, or memberUid. Any instance of {0} in the filter is replaced by the user attribute defined in group_search.user_attribute.

group_search.user_attribute

(Static) Specifies the user attribute that is fetched and provided as a parameter to the filter. If not set, the user DN is passed into the filter. Defaults to Empty.

unmapped_groups_as_roles

(Static) If set to true, the names of any unmapped LDAP groups are used as role names and assigned to the user. A group is considered to be unmapped if it is not referenced in a role-mapping file. API-based role mappings are not considered. Defaults to false.

files.role_mapping

(Static) The location for the YAML role mapping configuration file. Defaults to ES_PATH_CONF/role_mapping.yml.

follow_referrals

(Static) Specifies whether Elasticsearch should follow referrals returned by the LDAP server. Referrals are URLs returned by the server that are to be used to continue the LDAP operation (for example, search). Defaults to true.

metadata

(Static) A list of additional LDAP attributes that should be loaded from the LDAP server and stored in the authenticated user’s metadata field.

timeout.tcp_connect

(Static) The TCP connect timeout period for establishing an LDAP connection. An s at the end indicates seconds, or ms indicates milliseconds. Defaults to 5s (5 seconds ).

timeout.tcp_read

(Static) [7.7] Deprecated in 7.7. The TCP read timeout period after establishing an LDAP connection. This is equivalent to and is deprecated in favor of timeout.response and they cannot be used simultaneously. An s at the end indicates seconds, or ms indicates milliseconds.

timeout.response

(Static) The time interval to wait for the response from the LDAP server. An s at the end indicates seconds, or ms indicates milliseconds. Defaults to the value of timeout.ldap_search.

timeout.ldap_search

(Static) The timeout period for an LDAP search. The value is specified in the request and is enforced by the receiving LDAP Server. An s at the end indicates seconds, or ms indicates milliseconds. Defaults to 5s (5 seconds ).

ssl.key

(Static) Path to a PEM encoded file containing the private key.

If HTTP client authentication is required, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

If the LDAP server requires client authentication, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

ssl.key_passphrase

(Static) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.secure_key_passphrase at the same time.

ssl.secure_key_passphrase

(Secure) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

ssl.certificate

(Static) Specifies the path for the PEM encoded certificate (or certificate chain) that is associated with the key.

This setting can be used only if ssl.key is set.

This certificate is presented to clients when they connect.

ssl.certificate_authorities

(Static) List of paths to PEM encoded certificate files that should be trusted.

This setting and ssl.truststore.path cannot be used at the same time.

You cannot use this setting and ssl.truststore.path at the same time.

ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

You cannot use this setting and ssl.key at the same time.

ssl.keystore.type

(Static) The format of the keystore file. It must be either jks or PKCS12. If the keystore path ends in ".p12", ".pfx", or ".pkcs12", this setting defaults to PKCS12. Otherwise, it defaults to jks.

ssl.keystore.password

(Static) The password for the keystore.

ssl.keystore.secure_password

(Secure) The password for the keystore.

ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

ssl.keystore.secure_key_password

(Static) The password for the key in the keystore. The default is the keystore password.

ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

ssl.truststore.secure_password

(Secure) Password for the truststore.

ssl.truststore.type

(Static) The format of the truststore file. It must be either jks or PKCS12. If the file name ends in ".p12", ".pfx" or "pkcs12", the default is PKCS12. Otherwise, it defaults to jks.

ssl.verification_mode

(Static) Indicates the type of verification when using ldaps to protect against man in the middle attacks and certificate forgery.

Valid values

full: Validates that the provided certificate: has an issue date that’s within the not_before and not_after dates; chains to a trusted Certificate Authority (CA); has a hostname or IP address that matches the names within the certificate.
certificate: Validates the provided certificate and verifies that it’s signed by a trusted authority (CA), but doesn’t check the certificate hostname.
none: Performs no certificate validation.

Setting certificate validation to none disables many security benefits of SSL/TLS, which is very dangerous. Only set this value if instructed by Elastic Support as a temporary diagnostic mechanism when attempting to resolve TLS errors.

Defaults to full.

ssl.supported_protocols

(Static) Supported protocols with versions. Valid protocols: SSLv2Hello, SSLv3, TLSv1, TLSv1.1, TLSv1.2, TLSv1.3. If the JVM’s SSL provider supports TLSv1.3, the default is TLSv1.3,TLSv1.2,TLSv1.1. Otherwise, the default is TLSv1.2,TLSv1.1.

Elasticsearch relies on your JDK’s implementation of SSL and TLS. View Supported SSL/TLS versions by JDK version for more information.

If xpack.security.fips_mode.enabled is true, you cannot use SSLv2Hello or SSLv3. See FIPS 140-2.

ssl.cipher_suites

(Static) Specifies the cipher suites that should be supported when communicating with the LDAP server. Supported cipher suites vary depending on which version of Java you use. For example, for version 12 the default value is TLS_AES_256_GCM_SHA384, TLS_AES_128_GCM_SHA256, TLS_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA.

For more information, see Oracle’s Java Cryptography Architecture documentation.

cache.ttl: (Static) Specifies the time-to-live for cached user entries. A user and a hash of its credentials are cached for this period of time. Use the standard Elasticsearch time units. Defaults to 20m.
cache.max_users: (Static) Specifies the maximum number of user entries that the cache can contain. Defaults to 100000.
cache.hash_algo: (Static, Expert) Specifies the hashing algorithm that is used for the in-memory cached user credentials. See Table 1, “Cache hash algorithms”. Defaults to ssha256.
authentication.enabled: (Static) If set to false, disables authentication support in this realm, so that it only supports user lookups. (See the run as and authorization realms features). Defaults to true.

Active Directory realm settings

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In addition to the settings that are valid for all realms, you can specify the following settings:

url

(Static) One or more LDAP URLs in the ldap[s]://<server>:<port> format. Defaults to ldap://<domain_name>:389. This setting is required when connecting using SSL/TLS or when using a custom port.

To provide multiple URLs, use a YAML array (["ldap://server1:636", "ldap://server2:636"]) or comma-separated string ("ldap://server1:636, ldap://server2:636").

While both are supported, you can’t mix the ldap and ldaps protocols.

If no URL is provided, Elasticsearch uses a default of ldap://<domain_name>:389. This default uses the domain_name setting value and assumes an unencrypted connection to port 389.

load_balance.type

(Static) The behavior to use when there are multiple LDAP URLs defined. For supported values see load balancing and failover types. Defaults to failover.

load_balance.cache_ttl

(Static) When using dns_failover or dns_round_robin as the load balancing type, this setting controls the amount of time to cache DNS lookups. Defaults to 1h.

domain_name

(Static) The domain name of Active Directory. If the url and the user_search.base_dn settings are not specified, the cluster can derive those values from this setting. Required.

bind_dn

(Static) The DN of the user that is used to bind to Active Directory and perform searches. Defaults to Empty. Due to its potential security impact, bind_dn is not exposed via the nodes info API.

bind_password

(Static) [6.3] Deprecated in 6.3. Use secure_bind_password instead. The password for the user that is used to bind to Active Directory. Defaults to Empty. Due to its potential security impact, bind_password is not exposed via the nodes info API.

secure_bind_password

(Secure) The password for the user that is used to bind to Active Directory. Defaults to Empty.

unmapped_groups_as_roles

(Static) If set to true, the names of any unmapped Active Directory groups are used as role names and assigned to the user. A group is considered unmapped when it is not referenced in any role-mapping files. API-based role mappings are not considered. Defaults to false.

files.role_mapping

(Static) The location for the YAML role mapping configuration file. Defaults to ES_PATH_CONF/role_mapping.yml.

user_search.base_dn

(Static) The context to search for a user. Defaults to the root of the Active Directory domain.

user_search.scope

(Static) Specifies whether the user search should be sub_tree, one_level or base. one_level only searches users directly contained within the base_dn. sub_tree searches all objects contained under base_dn. base specifies that the base_dn is a user object, and that it is the only user considered. Defaults to sub_tree.

user_search.filter

(Static) Specifies a filter to use to lookup a user given a username. The default filter looks up user objects with either sAMAccountName or userPrincipalName. If specified, this must be a valid LDAP user search filter. For example (&(objectClass=user)(sAMAccountName={0})). For more information, see Search Filter Syntax.

user_search.upn_filter

(Static) Specifies a filter to use to lookup a user given a user principal name. The default filter looks up user objects with a matching userPrincipalName. If specified, this must be a valid LDAP user search filter. For example, (&(objectClass=user)(userPrincipalName={1})). {1} is the full user principal name provided by the user. For more information, see Search Filter Syntax.

user_search.down_level_filter

(Static) Specifies a filter to use to lookup a user given a down level logon name (DOMAIN\user). The default filter looks up user objects with a matching sAMAccountName in the domain provided. If specified, this must be a valid LDAP user search filter. For example, (&(objectClass=user)(sAMAccountName={0})). For more information, see Search Filter Syntax.

user_search.pool.enabled

(Static) Enables or disables connection pooling for user search. When disabled a new connection is created for every search. The default is true when bind_dn is provided.

user_search.pool.size

(Static) The maximum number of connections to the Active Directory server to allow in the connection pool. Defaults to 20.

user_search.pool.initial_size

(Static) The initial number of connections to create to the Active Directory server on startup. Defaults to 0. If the LDAP server is down, values greater than 0 could cause startup failures.

user_search.pool.health_check.enabled

(Static) Enables or disables a health check on Active Directory connections in the connection pool. Connections are checked in the background at the specified interval. Defaults to true.

user_search.pool.health_check.dn

(Static) The distinguished name to be retrieved as part of the health check. Defaults to the value of bind_dn if that setting is present. Otherwise, it defaults to the value of the user_search.base_dn setting.

user_search.pool.health_check.interval

(Static) The interval to perform background checks of connections in the pool. Defaults to 60s.

group_search.base_dn

(Static) The context to search for groups in which the user has membership. Defaults to the root of the Active Directory domain.

group_search.scope

(Static) Specifies whether the group search should be sub_tree, one_level or base. one_level searches for groups directly contained within the base_dn. sub_tree searches all objects contained under base_dn. base specifies that the base_dn is a group object, and that it is the only group considered. Defaults to sub_tree.

metadata

(Static) A list of additional LDAP attributes that should be loaded from the LDAP server and stored in the authenticated user’s metadata field.

timeout.tcp_connect

(Static) The TCP connect timeout period for establishing an LDAP connection. An s at the end indicates seconds, or ms indicates milliseconds. Defaults to 5s (5 seconds ).

timeout.tcp_read

timeout.response

(Static) The time interval to wait for the response from the AD server. An s at the end indicates seconds, or ms indicates milliseconds. Defaults to the value of timeout.ldap_search.

timeout.ldap_search

ssl.certificate

(Static) Specifies the path for the PEM encoded certificate (or certificate chain) that is associated with the key.

This setting can be used only if ssl.key is set.

This certificate is presented to clients when they connect.

ssl.certificate_authorities

(Static) List of paths to PEM encoded certificate files that should be trusted.

This setting and ssl.truststore.path cannot be used at the same time.

You cannot use this setting and ssl.truststore.path at the same time.

ssl.key

(Static) Path to a PEM encoded file containing the private key.

If HTTP client authentication is required, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

If the Active Directory server requires client authentication, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

ssl.key_passphrase

(Static) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.secure_key_passphrase at the same time.

ssl.secure_key_passphrase

(Secure) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

ssl.keystore.password

(Static) The password for the keystore.

ssl.secure_keystore.password

(Secure) The password for the keystore.

ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

You cannot use this setting and ssl.key at the same time.

ssl.keystore.type

ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

ssl.truststore.secure_password

(Secure) Password for the truststore.

ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

ssl.truststore.type

(Static) The format of the truststore file. It must be either jks or PKCS12. If the file name ends in ".p12", ".pfx" or "pkcs12", the default is PKCS12. Otherwise, it defaults to jks.

ssl.verification_mode

(Static) Indicates the type of verification when using ldaps to protect against man in the middle attacks and certificate forgery.

Valid values

full: Validates that the provided certificate: has an issue date that’s within the not_before and not_after dates; chains to a trusted Certificate Authority (CA); has a hostname or IP address that matches the names within the certificate.
certificate: Validates the provided certificate and verifies that it’s signed by a trusted authority (CA), but doesn’t check the certificate hostname.
none: Performs no certificate validation.

Setting certificate validation to none disables many security benefits of SSL/TLS, which is very dangerous. Only set this value if instructed by Elastic Support as a temporary diagnostic mechanism when attempting to resolve TLS errors.

Defaults to full.

ssl.supported_protocols

Elasticsearch relies on your JDK’s implementation of SSL and TLS. View Supported SSL/TLS versions by JDK version for more information.

If xpack.security.fips_mode.enabled is true, you cannot use SSLv2Hello or SSLv3. See FIPS 140-2.

ssl.cipher_suites

(Static) Specifies the cipher suites that should be supported when communicating with the Active Directory server. Supported cipher suites vary depending on which version of Java you use. For example, for version 12 the default value is TLS_AES_256_GCM_SHA384, TLS_AES_128_GCM_SHA256, TLS_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA.

For more information, see Oracle’s Java Cryptography Architecture documentation.

cache.ttl: (Static) Specifies the time-to-live for cached user entries. A user and a hash of its credentials are cached for this configured period of time. Use the standard Elasticsearch time units). Defaults to 20m.
cache.max_users: (Static) Specifies the maximum number of user entries that the cache can contain. Defaults to 100000.
cache.hash_algo: (Static, Expert) Specifies the hashing algorithm that is used for the in-memory cached user credentials. See Table 1, “Cache hash algorithms”. Defaults to ssha256.
authentication.enabled: (Static) If set to false, disables authentication support in this realm, so that it only supports user lookups. (See the run as and authorization realms features). Defaults to true.
follow_referrals: (Static) If set to true, Elasticsearch follows referrals returned by the LDAP server. Referrals are URLs returned by the server that are to be used to continue the LDAP operation (such as search). Defaults to true.

PKI realm settings

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In addition to the settings that are valid for all realms, you can specify the following settings:

username_pattern

(Static) The regular expression pattern used to extract the username from the certificate DN. The first match group is the used as the username. Defaults to CN=(.*?)(?:,\|$).

certificate_authorities

(Static) List of paths to the PEM certificate files that should be used to authenticate a user’s certificate as trusted. Defaults to the trusted certificates configured for SSL. This setting cannot be used with truststore.path.

truststore.algorithm

(Static) Algorithm for the truststore. Defaults to SunX509.

truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

If truststore.path is set, this setting is required.

truststore.secure_password: (Secure) Password for the truststore.
truststore.path: (Static) The path of a truststore to use. Defaults to the trusted certificates configured for SSL. This setting cannot be used with certificate_authorities.
files.role_mapping: (Static) Specifies the location of the YAML role mapping configuration file. Defaults to ES_PATH_CONF/role_mapping.yml.
authorization_realms: (Static) The names of the realms that should be consulted for delegated authorization. If this setting is used, then the PKI realm does not perform role mapping and instead loads the user from the listed realms. See Delegating authorization to another realm.
cache.ttl: (Static) Specifies the time-to-live for cached user entries. A user and a hash of its credentials are cached for this period of time. Use the standard Elasticsearch time units). Defaults to 20m.
cache.max_users: (Static) Specifies the maximum number of user entries that the cache can contain. Defaults to 100000.
delegation.enabled: (Static) Generally, in order for the clients to be authenticated by the PKI realm they must connect directly to Elasticsearch. That is, they must not pass through proxies which terminate the TLS connection. In order to allow for a trusted and smart proxy, such as Kibana, to sit before Elasticsearch and terminate TLS connections, but still allow clients to be authenticated on Elasticsearch by this realm, you need to toggle this to true. Defaults to false. If delegation is enabled, then either truststore.path or certificate_authorities setting must be defined. For more details, see Configuring authentication delegation for PKI realms.

SAML realm settings

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In addition to the settings that are valid for all realms, you can specify the following settings.

idp.entity_id: (Static) The Entity ID of the SAML Identity Provider. An Entity ID is a URI with a maximum length of 1024 characters. It can be a URL (https://idp.example.com/) or a URN (urn:example.com:idp) and can be found in the configuration or the SAML metadata of the Identity Provider.

idp.metadata.path

(Static) The path (recommended) or URL to a SAML 2.0 metadata file describing the capabilities and configuration of the Identity Provider. If a path is provided, then it is resolved relative to the Elasticsearch config directory. If a URL is provided, then it must be either a file URL or a https URL.

Elasticsearch automatically polls this metadata resource and reloads the IdP configuration when changes are detected. File based resources are polled at a frequency determined by the global Elasticsearch resource.reload.interval.high setting, which defaults to 5 seconds. HTTPS resources are polled at a frequency determined by the realm’s idp.metadata.http.refresh and idp.metadata.http.minimum_refresh settings.

If the metadata resource is loaded from a file then the file must exist at node startup, if it does not exist then the node will fail to start. If the resource is loaded over HTTPS then (by default) the node will be tolerant of a failure to load the resource - the node will start and will continue to poll the URL for updates. The affected SAML realm will fail to authenticate users until the problem is resolved. To force the node to fail if the metadata is unavailable set idp.metadata.http.fail_on_error to true.

idp.metadata.http.fail_on_error: (Static) If set to true, the realm will fail on startup (and prevent the node from starting) if it attempts to load metadata over HTTPS and that metadata is not available. If set to false (the default), the node will start but the affected SAML realm will not support user authentication until the metadata can be successfully loaded. This setting is ignored if metadata is loaded from a file.

idp.metadata.http.refresh

(Static) Controls the frequency with which https metadata is checked for changes. Defaults to 1h (1 hour).

Under some circumstances Elasticsearch may determine that the metadata needs to be checked more frequently. This may occur if previous attempts to load the metadata encountered an error, or if the metadata indicates that it is due to expire in less than the configured refresh interval. In these cases Elasticsearch will poll more often, but never more frequently than idp.metadata.http.minimum_refresh. If there is an attempt to authenticate against a realm that has not yet loaded metadata successfully, that realm may attempt to load metadata outside of the configured polling frequency.

idp.metadata.http.minimum_refresh: (Static) Controls the minimum frequency with which https metadata is checked for changes. In regular operation Elasticsearch will use the value of idp.metadata.http.refresh as the polling interval. However, under some circumstances Elasticsearch may determine that it needs to poll more frequently. In these cases, the minimum_refresh will set the minimum frequency at which the metdata will be checked. Defaults to 5m (5 minutes) and must not be set to a value greater than idp.metadata.http.refresh

idp.use_single_logout: (Static) Indicates whether to utilise the Identity Provider’s Single Logout service (if one exists in the IdP metadata file). Defaults to true.

sp.entity_id: (Static) The Entity ID to use for this SAML Service Provider. This should be entered as a URI. We recommend that you use the base URL of your Kibana instance. For example, https://kibana.example.com/.

sp.acs: (Static) The URL of the Assertion Consumer Service within Kibana. Typically this is the "api/security/saml/callback" endpoint of your Kibana server. For example, https://kibana.example.com/api/security/saml/callback.

sp.logout: (Static) The URL of the Single Logout service within Kibana. Typically this is the "logout" endpoint of your Kibana server. For example, https://kibana.example.com/logout.

attributes.principal: (Static) The Name of the SAML attribute that contains the user’s principal (username).

attributes.groups: (Static) The Name of the SAML attribute that contains the user’s groups.

attributes.name: (Static) The Name of the SAML attribute that contains the user’s full name.

attributes.mail: (Static) The Name of the SAML attribute that contains the user’s email address.

attributes.dn: (Static) The Name of the SAML attribute that contains the user’s X.50 Distinguished Name.

attribute_patterns.principal: (Static) A Java regular expression that is matched against the SAML attribute specified by attributes.pattern before it is applied to the user’s principal property. The attribute value must match the pattern and the value of the first capturing group is used as the principal. For example, ^([^@]+)@example\\.com$ matches email addresses from the "example.com" domain and uses the local-part as the principal.

attribute_patterns.groups: (Static) As per attribute_patterns.principal, but for the group property.

attribute_patterns.name: (Static) As per attribute_patterns.principal, but for the name property.

attribute_patterns.mail: (Static) As per attribute_patterns.principal, but for the mail property.

attribute_patterns.dn: (Static) As per attribute_patterns.principal, but for the dn property.

nameid_format: (Static) The NameID format that should be requested when asking the IdP to authenticate the current user. The default is to not include the nameid_format attribute.

nameid.allow_create: (Static) The value of the AllowCreate attribute of the NameIdPolicy element in an authentication request. The default value is false.

nameid.sp_qualifier: (Static) The value of the SPNameQualifier attribute of the NameIdPolicy element in an authentication request. The default is to not include the SPNameQualifier attribute.

force_authn: (Static) Specifies whether to set the ForceAuthn attribute when requesting that the IdP authenticate the current user. If set to true, the IdP is required to verify the user’s identity, irrespective of any existing sessions they might have. Defaults to false.

populate_user_metadata: (Static) Specifies whether to populate the Elasticsearch user’s metadata with the values that are provided by the SAML attributes. Defaults to true.
authorization_realms: (Static) The names of the realms that should be consulted for delegated authorization. If this setting is used, then the SAML realm does not perform role mapping and instead loads the user from the listed realms. See Delegating authorization to another realm.

allowed_clock_skew: (Static) The maximum amount of skew that can be tolerated between the IdP’s clock and the Elasticsearch node’s clock. Defaults to 3m (3 minutes).

req_authn_context_class_ref

(Static) A comma separated list of Authentication Context Class Reference values to be included in the Requested Authentication Context when requesting the IdP to authenticate the current user. The Authentication Context of the corresponding authentication response should contain at least one of the requested values.

For more information, see Requesting specific authentication methods.

SAML realm signing settings

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If a signing key is configured (that is, either signing.key or signing.keystore.path is set), then Elasticsearch signs outgoing SAML messages. Signing can be configured using the following settings:

signing.saml_messages: (Static) A list of SAML message types that should be signed or * to sign all messages. Each element in the list should be the local name of a SAML XML Element. Supported element types are AuthnRequest, LogoutRequest and LogoutResponse. Only valid if signing.key or signing.keystore.path is also specified. Defaults to *.

signing.key: (Static) Specifies the path to the PEM encoded private key to use for SAML message signing. signing.key and signing.keystore.path cannot be used at the same time.
signing.secure_key_passphrase: (Secure) Specifies the passphrase to decrypt the PEM encoded private key (signing.key) if it is encrypted.

signing.certificate: (Static) Specifies the path to the PEM encoded certificate (or certificate chain) that corresponds to the signing.key. This certificate must also be included in the Service Provider metadata or manually configured within the IdP to allow for signature validation. This setting can only be used if signing.key is set.

signing.keystore.path: (Static) The path to the keystore that contains a private key and certificate. It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and signing.key at the same time.

signing.keystore.type: (Static) The type of the keystore in signing.keystore.path. Must be either jks or PKCS12. If the keystore path ends in ".p12", ".pfx", or "pkcs12", this setting defaults to PKCS12. Otherwise, it defaults to jks.

signing.keystore.alias: (Static) Specifies the alias of the key within the keystore that should be used for SAML message signing. If the keystore contains more than one private key, this setting must be specified.
signing.keystore.secure_password: (Secure) The password to the keystore in signing.keystore.path.
signing.keystore.secure_key_password: (Secure) The password for the key in the keystore (signing.keystore.path). Defaults to the keystore password.

SAML realm encryption settings

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If an encryption key is configured (that is, either encryption.key or encryption.keystore.path is set), then Elasticsearch publishes an encryption certificate when generating metadata and attempts to decrypt incoming SAML content. Encryption can be configured using the following settings:

encryption.key: (Static) Specifies the path to the PEM encoded private key to use for SAML message decryption. encryption.key and encryption.keystore.path cannot be used at the same time.
encryption.secure_key_passphrase: (Secure) Specifies the passphrase to decrypt the PEM encoded private key (encryption.key) if it is encrypted.

encryption.certificate: (Static) Specifies the path to the PEM encoded certificate (or certificate chain) that is associated with the encryption.key. This certificate must also be included in the Service Provider metadata or manually configured within the IdP to enable message encryption. This setting can be used only if encryption.key is set.

encryption.keystore.path: (Static) The path to the keystore that contains a private key and certificate. It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and encryption.key at the same time.

encryption.keystore.type: (Static) The type of the keystore (encryption.keystore.path). Must be either jks or PKCS12. If the keystore path ends in ".p12", ".pfx", or "pkcs12", this setting defaults to PKCS12. Otherwise, it defaults to jks.

encryption.keystore.alias: (Static) Specifies the alias of the key within the keystore (encryption.keystore.path) that should be used for SAML message decryption. If not specified, all compatible key pairs from the keystore are considered as candidate keys for decryption.
encryption.keystore.secure_password: (Secure) The password to the keystore (encryption.keystore.path).
encryption.keystore.secure_key_password: (Secure) The password for the key in the keystore (encryption.keystore.path). Only a single password is supported. If you are using multiple decryption keys, they cannot have individual passwords.

SAML realm SSL settings

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If you are loading the IdP metadata over SSL/TLS (that is, idp.metadata.path is a URL using the https protocol), the following settings can be used to configure SSL.

These settings are not used for any purpose other than loading metadata over https.

ssl.key

(Static) Path to a PEM encoded file containing the private key.

If HTTP client authentication is required, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

ssl.key_passphrase

(Static) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.secure_key_passphrase at the same time.

ssl.secure_key_passphrase

(Secure) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.key_passphrase at the same time.

ssl.certificate

(Static) Specifies the path for the PEM encoded certificate (or certificate chain) that is associated with the key.

This setting can be used only if ssl.key is set.

ssl.certificate_authorities

(Static) List of paths to PEM encoded certificate files that should be trusted.

This setting and ssl.truststore.path cannot be used at the same time.

ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

ssl.keystore.type: (Static) The format of the keystore file. It must be either jks or PKCS12. If the keystore path ends in ".p12", ".pfx", or ".pkcs12", this setting defaults to PKCS12. Otherwise, it defaults to jks.

ssl.keystore.password: (Static) The password for the keystore.

ssl.keystore.secure_password

(Secure) The password for the keystore.

You cannot use this setting and ssl.keystore.password at the same time.

ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

You cannot use this setting and ssl.keystore.secure_key_password at the same time.

ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.key_password at the same time.

ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

ssl.truststore.type: (Static) The format of the truststore file. It must be either jks or PKCS12. If the file name ends in ".p12", ".pfx" or "pkcs12", the default is PKCS12. Otherwise, it defaults to jks.

ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

ssl.truststore.secure_password

(Secure) Password for the truststore.

This setting cannot be used with ssl.truststore.password.

ssl.verification_mode

(Static) Controls the verification of certificates.

Valid values

full: Validates that the provided certificate: has an issue date that’s within the not_before and not_after dates; chains to a trusted Certificate Authority (CA); has a hostname or IP address that matches the names within the certificate.
certificate: Validates the provided certificate and verifies that it’s signed by a trusted authority (CA), but doesn’t check the certificate hostname.
none: Performs no certificate validation.

Setting certificate validation to none disables many security benefits of SSL/TLS, which is very dangerous. Only set this value if instructed by Elastic Support as a temporary diagnostic mechanism when attempting to resolve TLS errors.

Defaults to full.

ssl.supported_protocols

Elasticsearch relies on your JDK’s implementation of SSL and TLS. View Supported SSL/TLS versions by JDK version for more information.

If xpack.security.fips_mode.enabled is true, you cannot use SSLv2Hello or SSLv3. See FIPS 140-2.

ssl.cipher_suites

(Static) Supported cipher suites vary depending on which version of Java you use. For example, for version 12 the default value is TLS_AES_256_GCM_SHA384, TLS_AES_128_GCM_SHA256, TLS_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA.

For more information, see Oracle’s Java Cryptography Architecture documentation.

Kerberos realm settings

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In addition to the settings that are valid for all realms, you can specify the following settings:

keytab.path: (Static) Specifies the path to the Kerberos keytab file that contains the service principal used by this Elasticsearch node. This must be a location within the Elasticsearch configuration directory and the file must have read permissions. Required.

remove_realm_name: (Static) Set to true to remove the realm part of principal names. Principal names in Kerberos have the form user/instance@REALM. If this option is true, the realm part (@REALM) will not be included in the username. Defaults to false.
krb.debug: (Static) Set to true to enable debug logs for the Java login module that provides support for Kerberos authentication. Defaults to false.

cache.ttl: (Static) The time-to-live for cached user entries. A user is cached for this period of time. Specify the time period using the standard Elasticsearch time units. Defaults to 20m.

cache.max_users: (Static) The maximum number of user entries that can live in the cache at any given time. Defaults to 100,000.

authorization_realms: (Static) The names of the realms that should be consulted for delegated authorization. If this setting is used, then the Kerberos realm does not perform role mapping and instead loads the user from the listed realms. See Delegating authorization to another realm.

OpenID Connect realm settings

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In addition to the settings that are valid for all realms, you can specify the following settings.

op.issuer: (Static) A verifiable Identifier for your OpenID Connect Provider. An Issuer Identifier is usually a case sensitive URL using the https scheme that contains scheme, host, and optionally, port number and path components and no query or fragment components. The value for this setting should be provided by your OpenID Connect Provider.

op.authorization_endpoint: (Static) The URL for the Authorization Endpoint at the OpenID Connect Provider. The value for this setting should be provided by your OpenID Connect Provider.

op.token_endpoint: (Static) The URL for the Token Endpoint at the OpenID Connect Provider. The value for this setting should be provided by your OpenID Connect Provider.

op.userinfo_endpoint: (Static) The URL for the User Info Endpoint at the OpenID Connect Provider. The value for this setting should be provided by your OpenID Connect Provider.

op.endsession_endpoint: (Static) The URL for the End Session Endpoint at the OpenID Connect Provider. The value for this setting should be provided by your OpenID Connect Provider.

op.jwkset_path

(Static) The path or URL to a JSON Web Key Set with the key material that the OpenID Connect Provider uses for signing tokens and claims responses. If a path is provided, then it is resolved relative to the Elasticsearch config directory. If a URL is provided, then it must be either a file URL or a https URL. Elasticsearch automatically caches the retrieved JWK set to avoid unnecessary HTTP requests but will attempt to refresh the JWK upon signature verification failure, as this might indicate that the OpenID Connect Provider has rotated the signing keys.

File-based resources are polled at a frequency determined by the global Elasticsearch resource.reload.interval.high setting, which defaults to 5 seconds.

authorization_realms

(Static) The names of the realms that should be consulted for delegated authorization. If this setting is used, then the OpenID Connect realm does not perform role mapping and instead loads the user from the listed realms. See Delegating authorization to another realm.

rp.client_id: (Static) The OAuth 2.0 Client Identifier that was assigned to Elasticsearch during registration at the OpenID Connect Provider.
rp.client_secret: (Secure) The OAuth 2.0 Client Secret that was assigned to Elasticsearch during registration at the OpenID Connect Provider.

rp.client_auth_method: (Static) The client authentication method used by Elasticsearch to authenticate to the OpenID Connect Provider. Can be client_secret_basic, client_secret_post, or client_secret_jwt. Defaults to client_secret_basic.

rp.client_auth_jwt_signature_algorithm: (Static) The signature algorithm that Elasticsearch uses to sign the JWT with which it authenticates as a client to the OpenID Connect Provider when client_secret_jwt is selected for rp.client_auth_method. Can be either HS256, HS384, or HS512. Defaults to HS384.

rp.redirect_uri: (Static) The Redirect URI within Kibana. If you want to use the authorization code flow, this is the api/security/oidc/callback endpoint of your Kibana server. If you want to use the implicit flow, it is the api/security/oidc/implicit endpoint. For example, https://kibana.example.com/api/security/oidc/callback.

rp.response_type: (Static) OAuth 2.0 Response Type value that determines the authorization processing flow to be used. Can be code for authorization code grant flow, or one of id_token, id_token token for the implicit flow.

rp.signature_algorithm: (Static) The signature algorithm that will be used by Elasticsearch in order to verify the signature of the id tokens it will receive from the OpenID Connect Provider. Allowed values are HS256, HS384, HS512, ES256, ES384, ES512, RS256, RS384, RS512, PS256, PS384, PS512. Defaults to RS256.

rp.requested_scopes: (Static) The scope values that will be requested by the OpenID Connect Provider as part of the Authentication Request. Optional, defaults to openid

rp.post_logout_redirect_uri: (Static) The Redirect URI (usually within Kibana) that the OpenID Connect Provider should redirect the browser to after a successful Single Logout.

claims.principal: (Static) The name of the OpenID Connect claim that contains the user’s principal (username).

claims.groups: (Static) The name of the OpenID Connect claim that contains the user’s groups.

claims.name: (Static) The name of the OpenID Connect claim that contains the user’s full name.

claims.mail: (Static) The name of the OpenID Connect claim that contains the user’s email address.

claims.dn: (Static) The name of the OpenID Connect claim that contains the user’s X.509 Distinguished Name.

claim_patterns.principal: (Static) A Java regular expression that is matched against the OpenID Connect claim specified by claims.principal before it is applied to the user’s principal property. The attribute value must match the pattern and the value of the first capturing group is used as the principal. For example, ^([^@]+)@example\\.com$ matches email addresses from the "example.com" domain and uses the local-part as the principal.

claim_patterns.groups: (Static) As per claim_patterns.principal, but for the group property.

claim_patterns.name: (Static) As per claim_patterns.principal, but for the name property.

claim_patterns.mail: (Static) As per claim_patterns.principal, but for the mail property.

claim_patterns.dn: (Static) As per claim_patterns.principal, but for the dn property.

allowed_clock_skew: (Static) The maximum allowed clock skew to be taken into consideration when validating id tokens with regards to their creation and expiration times. Defaults to 60s.

populate_user_metadata: (Static) Specifies whether to populate the Elasticsearch user’s metadata with the values that are provided by the OpenID Connect claims. Defaults to true.
http.proxy.host: (Static) Specifies the address of the proxy server that will be used by the internal http client for all back-channel communication to the OpenID Connect Provider endpoints. This includes requests to the Token Endpoint, the Userinfo Endpoint and requests to fetch the JSON Web Key Set from the OP if op.jwkset_path is set as a URL.
http.proxy.scheme: (Static) Specifies the protocol to use to connect to the proxy server that will be used by the http client for all back-channel communication to the OpenID Connect Provider endpoints. Defaults to http. Allowed values are http or https.
http.proxy.port: (Static) Specifies the port of the proxy server that will be used by the http client for all backchannel communication to the OpenID Connect Provider endpoints. Defaults to 80.

http.connect_timeout: (Static) Controls the behavior of the http client used for back-channel communication to the OpenID Connect Provider endpoints. Specifies the timeout until a connection is established. A value of zero means the timeout is not used. Defaults to 5s.

http.connection_read_timeout: (Static) Controls the behavior of the http client used for back-channel communication to the OpenID Connect Provider endpoints. Specifies the timeout used when requesting a connection from the connection manager. Defaults to 5s

http.socket_timeout: (Static) Controls the behavior of the http client used for back-channel communication to the OpenID Connect Provider endpoints. Specifies the socket timeout (SO_TIMEOUT) in milliseconds, which is the timeout for waiting for data or, put differently, a maximum period inactivity between two consecutive data packets). Defaults to 5s.

http.max_connections: (Static) Controls the behavior of the http client used for back-channel communication to the OpenID Connect Provider endpoints. Specifies the maximum number of connections allowed across all endpoints. Defaults to 200.

http.max_endpoint_connections: (Static) Controls the behavior of the http client used for back-channel communication to the OpenID Connect Provider endpoints. Specifies the maximum number of connections allowed per endpoint. Defaults to 200.

http.tcp.keep_alive: (Static) Whether to enable TCP keepalives on HTTP connections used for back-channel communication to the OpenID Connect Provider endpoints. Defaults to true.

http.connection_pool_ttl: (Static) Controls the behavior of the http client used for back-channel communication to the OpenID Connect Provider endpoints. Specifies the time-to-live of connections in the connection pool (default to 3 minutes). A connection is closed if it is idle for more than the specified timeout.

The server can also set the Keep-Alive HTTP response header. The effective time-to-live value is the smaller value between this setting and the Keep-Alive reponse header. Configure this setting to -1 to let the server dictate the value. If the header is not set by the server and the setting has value of -1, the time-to-live is infinite and connections never expire.

OpenID Connect realm SSL settings

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The following settings can be used to configure SSL for all outgoing http connections to the OpenID Connect Provider endpoints.

These settings are only used for the back-channel communication between Elasticsearch and the OpenID Connect Provider

ssl.key

(Static) Path to a PEM encoded file containing the private key.

If HTTP client authentication is required, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

ssl.key_passphrase

(Static) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.secure_key_passphrase at the same time.

ssl.secure_key_passphrase

(Secure) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.key_passphrase at the same time.

ssl.certificate

(Static) Specifies the path for the PEM encoded certificate (or certificate chain) that is associated with the key.

This setting can be used only if ssl.key is set.

ssl.certificate_authorities

(Static) List of paths to PEM encoded certificate files that should be trusted.

This setting and ssl.truststore.path cannot be used at the same time.

ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

ssl.keystore.type: (Static) The format of the keystore file. It must be either jks or PKCS12. If the keystore path ends in ".p12", ".pfx", or ".pkcs12", this setting defaults to PKCS12. Otherwise, it defaults to jks.

ssl.keystore.password: (Static) The password for the keystore.

ssl.keystore.secure_password

(Secure) The password for the keystore.

You cannot use this setting and ssl.keystore.password at the same time.

ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

You cannot use this setting and ssl.keystore.secure_key_password at the same time.

ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.key_password at the same time.

ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

ssl.truststore.type: (Static) The format of the truststore file. It must be either jks or PKCS12. If the file name ends in ".p12", ".pfx" or "pkcs12", the default is PKCS12. Otherwise, it defaults to jks.

ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

ssl.truststore.secure_password

(Secure) Password for the truststore.

You cannot use this setting and ssl.truststore.password at the same time.

ssl.verification_mode

(Static) Controls the verification of certificates.

Valid values

full: Validates that the provided certificate: has an issue date that’s within the not_before and not_after dates; chains to a trusted Certificate Authority (CA); has a hostname or IP address that matches the names within the certificate.
certificate: Validates the provided certificate and verifies that it’s signed by a trusted authority (CA), but doesn’t check the certificate hostname.
none: Performs no certificate validation.

Setting certificate validation to none disables many security benefits of SSL/TLS, which is very dangerous. Only set this value if instructed by Elastic Support as a temporary diagnostic mechanism when attempting to resolve TLS errors.

Defaults to full.

ssl.supported_protocols

Elasticsearch relies on your JDK’s implementation of SSL and TLS. View Supported SSL/TLS versions by JDK version for more information.

If xpack.security.fips_mode.enabled is true, you cannot use SSLv2Hello or SSLv3. See FIPS 140-2.

ssl.cipher_suites

For more information, see Oracle’s Java Cryptography Architecture documentation.

JWT realm settings

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In addition to the settings that are valid for all realms, you can specify the following settings.

token_type: (Static) The token type, id_token or access_token, that the JWT realm uses to verify incoming JWTs. Defaults to id_token.

allowed_audiences: (Static) A list of allowed JWT audiences that Elasticsearch should verify. Elasticsearch will only consume JWTs that were intended for any of these audiences, as denoted by the aud claim in the JWT). The audiences are compared with exact string matches and do not support wildcards or regex. Examples of aud claim are https://example.com/client1 and other_service,elasticsearch. When token_type is access_token, the audiences can be optionally denoted by a different claim in the JWT if aud does not exist. See also fallback_claims.aud.

allowed_clock_skew: (Static) The maximum allowed clock skew to be taken into consideration when validating JWTs with regards to their creation, not before, and expiration times.

allowed_issuer: (Static) A verifiable Identifier for your JWT Issuer. An Issuer Identifier is usually a case sensitive URL using the https scheme that contains scheme, host, and optionally, port number and path components and no query or fragment components. However, it can be any string. The value for this setting should be provided by your JWT Issuer. The issuer is compared with exact string matches and do not support wildcards or regex. Examples of iss claim are https://example.com:8443/jwt and issuer123.

allowed_subjects: (Static) A list of allowed JWT subjects that Elasticsearch should verify. Elasticsearch will only consume JWTs that were issued for any of these subjects, as denoted by the sub claim in the JWT. The subjects are compared with exact string matches and do not support wildcards or regex. Examples of sub claim are https://example.com/user1 and user_1,user2. When token_type is access_token, this setting is mandatory and the subject can be optionally denoted by a different claim in the JWT if sub does not exist. See also fallback_claims.sub.

fallback_claims.sub: (Static) The alternative claim to look for the subject information if the sub claim does not exist. It is configurable only when the token_type is access_token. The fallback is applied everywhere the sub claim is used.

fallback_claims.aud: (Static) The alternative claim to look for the audiences information if the aud claim does not exist. It is configurable only when the token_type is access_token. The fallback is applied everywhere the aud claim is used.

required_claims: (Static) Additional claims and associated values that Elasticsearch should verify. This is a group setting that takes key/value pairs, where the key is a string and the value must be either a string or an array of strings. The values are compared with exact string matches and do not support wildcards or regex.

For example:

xpack.security.authc.realms.jwt.jwt1:
  required_claims:
    token_use: "id"
    versions: ["1.0", "2.0"]

allowed_signature_algorithms: (Static) A list of signature algorithms that will be used by Elasticsearch in order to verify the signature of the JWT it will receive from the JWT Issuer. Defaults to RS256. Examples are HS512,RS512,ES512 and ES384. Allowed values are HS256, HS384, HS512, ES256, ES384, ES512, RS256, RS384, RS512, PS256, PS384, PS512.
authorization_realms: (Static) The names of the realms that should be consulted for delegated authorization. If this setting is used, then the JWT realm does not perform role mapping and instead loads the user from the listed realms. See Delegating authorization to another realm.

claims.dn: (Static) The name of the JWT claim that contains the user’s Distinguished Name (DN), which uniquely identifies a user or group.

claim_patterns.dn: (Static) Accepts the same Java regular expression as claim_patterns.principal, but for the dn property.

claims.groups: (Static) The name of the JWT claim that contains the user’s groups, such as groups and roles.

claim_patterns.group: (Static) Accepts the same Java regular expression as claim_patterns.principal, but for the group property.

claims.mail: (Static) The name of the JWT claim that contains the user’s e-mail address.

claim_patterns.mail: (Static) Accepts the same Java regular expression as claim_patterns.principal, but for the mail property.

claims.name: (Static) The name of the JWT claim that contains the user’s username.

claim_patterns.name: (Static) Accepts the same Java regular expression as claim_patterns.principal, but for the name property.

claims.principal: (Static) The name of the JWT claim that contains the user’s principal (username), such as sub, name, email, and dn.

claim_patterns.principal: (Static) An optional Java regular expression that is matched against the JWT claim specified by claims.principal before it is applied to the user’s principal property. The value must match the pattern and the value of the first capturing group is used as the principal. For example, ^([^@]+)@example\\.com$ matches email addresses from the example.com domain and uses the local-part as the principal. Another example is sub which may not need a pattern setting.

client_authentication.type

(Static) Specifies whether to use shared_secret or none to authenticate incoming client requests. If this value is shared_secret, the client is authenticated using an HTTP request header that must match a pre-configured secret value. The client must provide this shared secret with every request in the ES-Client-Authentication header. If this value is none, then the request header ES-Client-Authentication is ignored. Defaults to shared_secret.

Enabling client authentication is recommended. If JWT bearer tokens are shared with other clients or services, client authentication restricts which ones are allowed to submit those JWTs to Elasticsearch.

client_authentication.shared_secret: (Secure) Secret value string for client authentication. Required if client_authentication.type is shared_secret.

http.connect_timeout: (Static) Sets the timeout for the HTTP client that is used for fetching the JSON Web Key Set from a remote URL. A value of zero means the timeout is not used. Defaults to 5s.

http.connection_read_timeout: (Static) Specifies the HTTP timeout used when requesting a connection from the connection manager. Defaults to 5s.

http.socket_timeout: (Static) Specifies the maximum socket timeout (SO_TIMEOUT) for the HTTP client to wait for inactivity between two consecutive data packets. Defaults to 5s.

http.max_connections: (Static) Specifies the maximum number of connections allowed across all endpoints.

http.max_endpoint_connections: (Static) Specifies the maximum number of connections allowed per endpoint.
jwt.cache.size: (Static) Specifies the maximum number of JWT cache entries. If clients use a different JWT for every request, set to 0 to disable the JWT cache. Defaults to 100000.
jwt.cache.ttl: (Static) Specifies the time-to-live for the period of time to cache JWT entries. JWTs can only be cached if client authentication is successful (or disabled). Uses the standard Elasticsearch time units. If clients use a different JWT for every request, set to 0 to disable the JWT cache. Defaults to 20m.

pkc_jwkset_path

(Static) The file path or URL to a JSON Web Key Set (JWKS) with the public key material that the JWT Realm uses for verifying token signatures. If a path is provided, then it is resolved relative to the Elasticsearch configuration directory. In Elastic Cloud, use an absolute path starting with /app/config/.

If a URL is provided, then it must be either a file URL or an https URL. Elasticsearch automatically caches the retrieved JWK set to avoid unnecessary HTTP requests, but will attempt to refresh the JWK upon signature verification failure, as this might indicate that the JWT Provider has rotated the signing keys.

File-based resources are polled at a frequency determined by the global Elasticsearch resource.reload.interval.high setting, which defaults to 5s.

hmac_jwkset: (Secure) Contents of a JSON Web Key Set (JWKS), including the secret key that the JWT realm uses to verify token signatures. This format supports multiple keys and optional attributes, and is preferred over the hmac_key setting. Cannot be used in conjunction with the hmac_key setting. Refer to Configure Elasticsearch to use a JWT realm.

hmac_key: (Secure) Contents of a single JSON Web Key (JWK), including the secret key that the JWT realm uses to verify token signatures. This format only supports a single key without attributes, and cannot be used with the hmac_jwkset setting. This format is compatible with OIDC. The HMAC key must be a UNICODE string, where the key bytes are the UTF-8 encoding of the UNICODE string. The hmac_jwkset setting is preferred. Refer to Configure Elasticsearch to use a JWT realm.

populate_user_metadata: (Static) Specifies whether to populate the Elasticsearch user’s metadata with the values that are provided by the JWT claims. Defaults to true.

JWT realm SSL settings

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The following settings can be used to configure SSL for fetching the JSON Web Key Set from a remote URL.

These settings are only used for the back-channel communication between Elasticsearch and the JWT Issuer.

ssl.key

(Static) Path to a PEM encoded file containing the private key.

If HTTP client authentication is required, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

ssl.key_passphrase

(Static) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.secure_key_passphrase at the same time.

ssl.secure_key_passphrase

(Secure) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.key_passphrase at the same time.

ssl.certificate

(Static) Specifies the path for the PEM encoded certificate (or certificate chain) that is associated with the key.

This setting can be used only if ssl.key is set.

ssl.certificate_authorities

(Static) List of paths to PEM encoded certificate files that should be trusted.

This setting and ssl.truststore.path cannot be used at the same time.

ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

ssl.keystore.type: (Static) The format of the keystore file. It must be either jks or PKCS12. If the keystore path ends in ".p12", ".pfx", or ".pkcs12", this setting defaults to PKCS12. Otherwise, it defaults to jks.

ssl.keystore.secure_password

(Secure) The password for the keystore.

You cannot use this setting and ssl.keystore.password at the same time.

ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

You cannot use this setting and ssl.keystore.secure_key_password at the same time.

ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.key_password at the same time.

ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

ssl.truststore.type: (Static) The format of the truststore file. It must be either jks or PKCS12. If the file name ends in ".p12", ".pfx" or "pkcs12", the default is PKCS12. Otherwise, it defaults to jks.

ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

ssl.truststore.secure_password

(Secure) Password for the truststore.

You cannot use this setting and ssl.truststore.password at the same time.

ssl.verification_mode

(Static) Controls the verification of certificates.

Valid values

full: Validates that the provided certificate: has an issue date that’s within the not_before and not_after dates; chains to a trusted Certificate Authority (CA); has a hostname or IP address that matches the names within the certificate.
certificate: Validates the provided certificate and verifies that it’s signed by a trusted authority (CA), but doesn’t check the certificate hostname.
none: Performs no certificate validation.

Setting certificate validation to none disables many security benefits of SSL/TLS, which is very dangerous. Only set this value if instructed by Elastic Support as a temporary diagnostic mechanism when attempting to resolve TLS errors.

Defaults to full.

ssl.supported_protocols

Elasticsearch relies on your JDK’s implementation of SSL and TLS. View Supported SSL/TLS versions by JDK version for more information.

If xpack.security.fips_mode.enabled is true, you cannot use SSLv2Hello or SSLv3. See FIPS 140-2.

ssl.cipher_suites

For more information, see Oracle’s Java Cryptography Architecture documentation.

Load balancing and failover

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The static load_balance.type setting can have the following values:

failover: The URLs specified are used in the order that they are specified. The first server that can be connected to will be used for all subsequent connections. If a connection to that server fails then the next server that a connection can be established to will be used for subsequent connections.
dns_failover: In this mode of operation, only a single URL may be specified. This URL must contain a DNS name. The system will be queried for all IP addresses that correspond to this DNS name. Connections to the Active Directory or LDAP server will always be tried in the order in which they were retrieved. This differs from failover in that there is no reordering of the list and if a server has failed at the beginning of the list, it will still be tried for each subsequent connection.
round_robin: Connections will continuously iterate through the list of provided URLs. If a server is unavailable, iterating through the list of URLs will continue until a successful connection is made.
dns_round_robin: In this mode of operation, only a single URL may be specified. This URL must contain a DNS name. The system will be queried for all IP addresses that correspond to this DNS name. Connections will continuously iterate through the list of addresses. If a server is unavailable, iterating through the list of URLs will continue until a successful connection is made.

General TLS settings

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xpack.security.ssl.diagnose.trust: (Static) Controls whether to output diagnostic messages for SSL/TLS trust failures. If this is true (the default), a message will be printed to the Elasticsearch log whenever an SSL connection (incoming or outgoing) is rejected due to a failure to establish trust. This diagnostic message contains information that can be used to determine the cause of the failure and assist with resolving the problem. Set to false to disable these messages.

TLS/SSL key and trusted certificate settings

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The following settings are used to specify a private key, certificate, and the trusted certificates that should be used when communicating over an SSL/TLS connection. If no trusted certificates are configured, the default certificates that are trusted by the JVM will be trusted along with the certificate(s) associated with a key in the same context. The key and certificate must be in place for connections that require client authentication or when acting as a SSL enabled server.

Storing trusted certificates in a PKCS#12 file, although supported, is uncommon in practice. The elasticsearch-certutil tool, as well as Java’s keytool, are designed to generate PKCS#12 files that can be used both as a keystore and as a truststore, but this may not be the case for container files that are created using other tools. Usually, PKCS#12 files only contain secret and private entries. To confirm that a PKCS#12 container includes trusted certificate ("anchor") entries look for 2.16.840.1.113894.746875.1.1: <Unsupported tag 6> in the openssl pkcs12 -info output, or trustedCertEntry in the keytool -list output.

HTTP TLS/SSL settings

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You can configure the following TLS/SSL settings.

xpack.security.http.ssl.enabled

(Static) Used to enable or disable TLS/SSL on the HTTP networking layer, which Elasticsearch uses to communicate with other clients. The default is false.

xpack.security.http.ssl.supported_protocols

Elasticsearch relies on your JDK’s implementation of SSL and TLS. View Supported SSL/TLS versions by JDK version for more information.

If xpack.security.fips_mode.enabled is true, you cannot use SSLv2Hello or SSLv3. See FIPS 140-2.

xpack.security.http.ssl.client_authentication

(Static) Controls the server’s behavior in regard to requesting a certificate from client connections. Valid values are required, optional, and none. required forces a client to present a certificate, while optional requests a client certificate but the client is not required to present one. Defaults to none.

xpack.security.http.ssl.verification_mode

(Static) The SSL settings in xpack.security.http.ssl control a server context for TLS, which defines the settings for the TLS connection. The use of verification_mode in a TLS server is discouraged. Defines how to verify the certificates presented by another party in the TLS connection:

Valid values

full: Validates that the provided certificate: has an issue date that’s within the not_before and not_after dates; chains to a trusted Certificate Authority (CA); has a hostname or IP address that matches the names within the certificate.
certificate: Validates the provided certificate and verifies that it’s signed by a trusted authority (CA), but doesn’t check the certificate hostname.
none: Performs no certificate validation.

Setting certificate validation to none disables many security benefits of SSL/TLS, which is very dangerous. Only set this value if instructed by Elastic Support as a temporary diagnostic mechanism when attempting to resolve TLS errors.

Defaults to full.

xpack.security.http.ssl.cipher_suites

For more information, see Oracle’s Java Cryptography Architecture documentation.

HTTP TLS/SSL key and trusted certificate settings

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The following settings are used to specify a private key, certificate, and the trusted certificates that should be used when communicating over an SSL/TLS connection. A private key and certificate must be configured.

PEM encoded files

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When using PEM encoded files, use the following settings:

xpack.security.http.ssl.key

(Static) Path to a PEM encoded file containing the private key.

If HTTP client authentication is required, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

xpack.security.http.ssl.key_passphrase

(Static) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.secure_key_passphrase at the same time.

xpack.security.http.ssl.secure_key_passphrase

(Secure) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

xpack.security.http.ssl.certificate

(Static) Specifies the path for the PEM encoded certificate (or certificate chain) that is associated with the key.

This setting can be used only if ssl.key is set.

xpack.security.http.ssl.certificate_authorities

(Static) List of paths to PEM encoded certificate files that should be trusted.

This setting and ssl.truststore.path cannot be used at the same time.

Java keystore files

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When using Java keystore files (JKS), which contain the private key, certificate and certificates that should be trusted, use the following settings:

xpack.security.http.ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

xpack.security.http.ssl.keystore.password

(Static) The password for the keystore.

xpack.security.http.ssl.keystore.secure_password

(Secure) The password for the keystore.

xpack.security.http.ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

xpack.security.http.ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

xpack.security.http.ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

xpack.security.http.ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

xpack.security.http.ssl.truststore.secure_password

(Secure) Password for the truststore.

PKCS#12 files

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Elasticsearch can be configured to use PKCS#12 container files (.p12 or .pfx files) that contain the private key, certificate and certificates that should be trusted.

PKCS#12 files are configured in the same way as Java keystore files:

xpack.security.http.ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

xpack.security.http.ssl.keystore.type

xpack.security.http.ssl.keystore.password

(Static) The password for the keystore.

xpack.security.http.ssl.keystore.secure_password

(Secure) The password for the keystore.

xpack.security.http.ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

xpack.security.http.ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

xpack.security.http.ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

xpack.security.http.ssl.truststore.type

(Static) Set this to PKCS12 to indicate that the truststore is a PKCS#12 file.

xpack.security.http.ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

xpack.security.http.ssl.truststore.secure_password

(Secure) Password for the truststore.

Transport TLS/SSL settings

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You can configure the following TLS/SSL settings.

xpack.security.transport.ssl.enabled

(Static) Used to enable or disable TLS/SSL on the transport networking layer, which nodes use to communicate with each other. The default is false.

xpack.security.transport.ssl.supported_protocols

Elasticsearch relies on your JDK’s implementation of SSL and TLS. View Supported SSL/TLS versions by JDK version for more information.

If xpack.security.fips_mode.enabled is true, you cannot use SSLv2Hello or SSLv3. See FIPS 140-2.

xpack.security.transport.ssl.client_authentication

xpack.security.transport.ssl.verification_mode

(Static) Defines how to verify the certificates presented by another party in the TLS connection:

Valid values

full: Validates that the provided certificate: has an issue date that’s within the not_before and not_after dates; chains to a trusted Certificate Authority (CA); has a hostname or IP address that matches the names within the certificate.
certificate: Validates the provided certificate and verifies that it’s signed by a trusted authority (CA), but doesn’t check the certificate hostname.
none: Performs no certificate validation.

Setting certificate validation to none disables many security benefits of SSL/TLS, which is very dangerous. Only set this value if instructed by Elastic Support as a temporary diagnostic mechanism when attempting to resolve TLS errors.

Defaults to full.

xpack.security.transport.ssl.cipher_suites

For more information, see Oracle’s Java Cryptography Architecture documentation.

Transport TLS/SSL key and trusted certificate settings

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PEM encoded files

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When using PEM encoded files, use the following settings:

xpack.security.transport.ssl.key

(Static) Path to a PEM encoded file containing the private key.

If HTTP client authentication is required, it uses this file. You cannot use this setting and ssl.keystore.path at the same time.

xpack.security.transport.ssl.key_passphrase

(Static) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

You cannot use this setting and ssl.secure_key_passphrase at the same time.

xpack.security.transport.ssl.secure_key_passphrase

(Secure) The passphrase that is used to decrypt the private key. Since the key might not be encrypted, this value is optional.

xpack.security.transport.ssl.certificate

(Static) Specifies the path for the PEM encoded certificate (or certificate chain) that is associated with the key.

This setting can be used only if ssl.key is set.

xpack.security.transport.ssl.certificate_authorities

(Static) List of paths to PEM encoded certificate files that should be trusted.

This setting and ssl.truststore.path cannot be used at the same time.

Java keystore files

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When using Java keystore files (JKS), which contain the private key, certificate and certificates that should be trusted, use the following settings:

xpack.security.transport.ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

xpack.security.transport.ssl.keystore.password

(Static) The password for the keystore.

xpack.security.transport.ssl.keystore.secure_password

(Secure) The password for the keystore.

xpack.security.transport.ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

xpack.security.transport.ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

xpack.security.transport.ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

xpack.security.transport.ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

xpack.security.transport.ssl.truststore.secure_password

(Secure) Password for the truststore.

PKCS#12 files

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Elasticsearch can be configured to use PKCS#12 container files (.p12 or .pfx files) that contain the private key, certificate and certificates that should be trusted.

PKCS#12 files are configured in the same way as Java keystore files:

xpack.security.transport.ssl.keystore.path

(Static) The path for the keystore file that contains a private key and certificate.

It must be either a Java keystore (jks) or a PKCS#12 file. You cannot use this setting and ssl.key at the same time.

xpack.security.transport.ssl.keystore.type

xpack.security.transport.ssl.keystore.password

(Static) The password for the keystore.

xpack.security.transport.ssl.keystore.secure_password

(Secure) The password for the keystore.

xpack.security.transport.ssl.keystore.key_password

(Static) The password for the key in the keystore. The default is the keystore password.

You cannot use this setting and ssl.keystore.secure_password at the same time.

xpack.security.transport.ssl.keystore.secure_key_password

(Secure) The password for the key in the keystore. The default is the keystore password.

xpack.security.transport.ssl.truststore.path

(Static) The path for the keystore that contains the certificates to trust. It must be either a Java keystore (jks) or a PKCS#12 file.

You cannot use this setting and ssl.certificate_authorities at the same time.

xpack.security.transport.ssl.truststore.type

(Static) Set this to PKCS12 to indicate that the truststore is a PKCS#12 file.

xpack.security.transport.ssl.truststore.password

(Static) The password for the truststore.

You cannot use this setting and ssl.truststore.secure_password at the same time.

xpack.security.transport.ssl.truststore.secure_password

(Secure) Password for the truststore.

Transport profile TLS/SSL settings

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The same settings that are available for the default transport are also available for each transport profile. By default, the settings for a transport profile will be the same as the default transport unless they are specified.

As an example, lets look at the key setting. For the default transport this is xpack.security.transport.ssl.key. In order to use this setting in a transport profile, use the prefix transport.profiles.$PROFILE.xpack.security. and append the portion of the setting after xpack.security.transport.. For the key setting, this would be transport.profiles.$PROFILE.xpack.security.ssl.key.

IP filtering settings

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You can configure the following settings for IP filtering.

xpack.security.transport.filter.allow: (Dynamic) List of IP addresses to allow.
xpack.security.transport.filter.deny: (Dynamic) List of IP addresses to deny.
xpack.security.http.filter.allow: (Dynamic) List of IP addresses to allow just for HTTP.
xpack.security.http.filter.deny: (Dynamic) List of IP addresses to deny just for HTTP.
transport.profiles.$PROFILE.xpack.security.filter.allow: (Dynamic) List of IP addresses to allow for this profile.
transport.profiles.$PROFILE.xpack.security.filter.deny: (Dynamic) List of IP addresses to deny for this profile.

User cache and password hash algorithms

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Certain realms store user credentials in memory. To limit exposure to credential theft and mitigate credential compromise, the cache only stores a hashed version of the user credentials in memory. By default, the user cache is hashed with a salted sha-256 hash algorithm. You can use a different hashing algorithm by setting the static cache.hash_algo realm settings to any of the following values:

Table 1. Cache hash algorithms

Algorithm			Description
`ssha256`			Uses a salted `sha-256` algorithm (default).
`md5`			Uses `MD5` algorithm.
`sha1`			Uses `SHA1` algorithm.
`bcrypt`			Uses `bcrypt` algorithm with salt generated in 1024 rounds.
`bcrypt4`			Uses `bcrypt` algorithm with salt generated in 16 rounds.
`bcrypt5`			Uses `bcrypt` algorithm with salt generated in 32 rounds.
`bcrypt6`			Uses `bcrypt` algorithm with salt generated in 64 rounds.
`bcrypt7`			Uses `bcrypt` algorithm with salt generated in 128 rounds.
`bcrypt8`			Uses `bcrypt` algorithm with salt generated in 256 rounds.
`bcrypt9`			Uses `bcrypt` algorithm with salt generated in 512 rounds.
`pbkdf2`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations.
`pbkdf2_1000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000 iterations.
`pbkdf2_10000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations.
`pbkdf2_50000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 50000 iterations.
`pbkdf2_100000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 100000 iterations.
`pbkdf2_500000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 500000 iterations.
`pbkdf2_1000000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000000 iterations.
`pbkdf2_stretch`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_1000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_10000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_50000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 50000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_100000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 100000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_500000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 500000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_1000000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000000 iterations, after hashing the initial input with SHA512 first.
`noop`,`clear_text`			Doesn’t hash the credentials and keeps it in clear text in memory. CAUTION: keeping clear text is considered insecure and can be compromised at the OS level (for example through memory dumps and using `ptrace`).

Likewise, realms that store passwords hash them using cryptographically strong and password-specific salt values. You can configure the algorithm for password hashing by setting the static xpack.security.authc.password_hashing.algorithm setting to one of the following:

Table 2. Password hashing algorithms

Algorithm			Description
`bcrypt`			Uses `bcrypt` algorithm with salt generated in 1024 rounds. (default)
`bcrypt4`			Uses `bcrypt` algorithm with salt generated in 16 rounds.
`bcrypt5`			Uses `bcrypt` algorithm with salt generated in 32 rounds.
`bcrypt6`			Uses `bcrypt` algorithm with salt generated in 64 rounds.
`bcrypt7`			Uses `bcrypt` algorithm with salt generated in 128 rounds.
`bcrypt8`			Uses `bcrypt` algorithm with salt generated in 256 rounds.
`bcrypt9`			Uses `bcrypt` algorithm with salt generated in 512 rounds.
`bcrypt10`			Uses `bcrypt` algorithm with salt generated in 1024 rounds.
`bcrypt11`			Uses `bcrypt` algorithm with salt generated in 2048 rounds.
`bcrypt12`			Uses `bcrypt` algorithm with salt generated in 4096 rounds.
`bcrypt13`			Uses `bcrypt` algorithm with salt generated in 8192 rounds.
`bcrypt14`			Uses `bcrypt` algorithm with salt generated in 16384 rounds.
`pbkdf2`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations.
`pbkdf2_1000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000 iterations.
`pbkdf2_10000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations.
`pbkdf2_50000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 50000 iterations.
`pbkdf2_100000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 100000 iterations.
`pbkdf2_500000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 500000 iterations.
`pbkdf2_1000000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000000 iterations.
`pbkdf2_stretch`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_1000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_10000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 10000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_50000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 50000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_100000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 100000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_500000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 500000 iterations, after hashing the initial input with SHA512 first.
`pbkdf2_stretch_1000000`			Uses `PBKDF2` key derivation function with `HMAC-SHA512` as a pseudorandom function using 1000000 iterations, after hashing the initial input with SHA512 first.

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