[DOCS] Adds native realm security settings (#30186)

Author: lcawl

x-pack/docs/en/security/authentication/native-realm.asciidoc

@@ -1,13 +1,13 @@
 [[native-realm]]
-=== Native User Authentication
+=== Native user authentication
 
 The easiest way to manage and authenticate users is with the internal `native`
 realm. You can use the REST APIs or Kibana to add and remove users, assign user roles, and
 manage user passwords.
 
 [[native-realm-configuration]]
 [float]
-==== Configuring a Native Realm
+==== Configuring a native realm
 
 The native realm is added to the realm chain by default. You don't need to
 explicitly configure a native realm to manage users through the REST APIs.
@@ -47,45 +47,12 @@ xpack:
 . Restart Elasticsearch.
 
 [[native-settings]]
-.Native Realm Settings
-[cols="4,^3,10"]
-|=======================
-| Setting             | Required  | Description
-
-| `type`              | yes       | Indicates the realm type. Must be set to `native`.
-
-| `order`             | no        | Indicates the priority of this realm within
-                                    the realm chain. Realms with a lower order
-                                    are consulted first. Although not required,
-                                    we recommend explicitly setting this value
-                                    when you configure multiple realms. Defaults
-                                    to `Integer.MAX_VALUE`.
-
-| `enabled`           | no        | Indicates whether this realm is enabled or
-                                    disabled. When set to `false`, the realm is
-                                    not added to the realm chain and therefore
-                                    is inactive. Defaults to `true`.
-
-| `cache.ttl`         | no        | Specifies the time-to-live for cached user
-                                    entries. A user's credentials are cached for
-                                    this period of time. Specify the time period
-                                    using the standard Elasticsearch
-                                    {ref}/common-options.html#time-units[time units].
-                                    Defaults to `20m`.
-
-| `cache.max_users`   | no        | Specifies the maximum number of user entries
-                                    that can be cached at any given time. Defaults
-                                    to 100,000.
-
-| `cache.hash_algo`   | no        | Specifies the hashing algorithm that is used
-                                    for the cached user credentials. See
-                                    <<cache-hash-algo, Cache hash algorithms>>
-                                    for the possible values. (Expert Setting)
-|=======================
+==== Native realm settings
 
+See {ref}/ref-native-settings.html[Native Realm Settings]. 
 
 [[managing-native-users]]
-==== Managing Native Users
+==== Managing native users
 
 {security} enables you to easily manage users in {kib} on the 
 *Management / Security / Users* page. 

x-pack/docs/en/settings/security-settings.asciidoc

@@ -1,8 +1,8 @@
 [role="xpack"]
 [[security-settings]]
-=== Security Settings in Elasticsearch
+=== Security settings in {es}
 ++++
-<titleabbrev>Security Settings</titleabbrev>
+<titleabbrev>Security settings</titleabbrev>
 ++++
 
 By default, {security} is disabled when you have a basic or trial license. To
@@ -23,14 +23,14 @@ For more information about creating and updating the {es} keystore, see
 
 [float]
 [[general-security-settings]]
-==== General Security Settings
+==== General security settings
 `xpack.security.enabled`::
 Set to `true` to enable {security} on the node. +
 +
 If set to `false`, which is the default value for basic and trial licenses,
 {security} is disabled. It also affects all {kib} instances that connect to this
 {es} instance; you do not need to disable {security} in those `kibana.yml` files.
-For more information about disabling {security} in specific {kib} instances, see  {kibana-ref}/security-settings-kb.html[{kib} Security Settings].
+For more information about disabling {security} in specific {kib} instances, see  {kibana-ref}/security-settings-kb.html[{kib} security settings].
 
 `xpack.security.hide_settings`::
 A comma-separated list of settings that are omitted from the results of the
@@ -42,16 +42,16 @@ sensitive nature of the information.
 
 [float]
 [[password-security-settings]]
-==== Default Password Security Settings
+==== Default password security settings
 `xpack.security.authc.accept_default_password`::
 In `elasticsearch.yml`, set this to `false` to disable support for the default "changeme" password.
 
 [float]
 [[anonymous-access-settings]]
-==== Anonymous Access Settings
+==== Anonymous access settings
 You can configure the following anonymous access settings in
 `elasticsearch.yml`.  For more information, see {xpack-ref}/anonymous-access.html[
-Enabling Anonymous Access].
+Enabling anonymous access].
 
 `xpack.security.authc.anonymous.username`::
 The username (principal) of the anonymous user. Defaults to `_es_anonymous_user`.
@@ -69,20 +69,20 @@ access. Defaults to `true`.
 
 [float]
 [[field-document-security-settings]]
-==== Document and Field Level Security Settings
+==== Document and field level security settings
 
 You can set the following document and field level security
 settings in `elasticsearch.yml`. For more information, see
-{xpack-ref}/field-and-document-access-control.html[Setting Up Document and Field
-Level Security].
+{xpack-ref}/field-and-document-access-control.html[Setting up document and field
+level security].
 
 `xpack.security.dls_fls.enabled`::
 Set to `false` to prevent document and field level security
 from being configured. Defaults to `true`.
 
 [float]
 [[token-service-settings]]
-==== Token Service Settings
+==== Token service settings
 
 You can set the following token service settings in
 `elasticsearch.yml`.
@@ -98,7 +98,7 @@ The length of time that a token is valid for. By default this value is `20m` or
 
 [float]
 [[realm-settings]]
-==== Realm Settings
+==== Realm settings
 You configure realm settings in the `xpack.security.authc.realms`
 namespace in `elasticsearch.yml`. For example:
 
@@ -124,10 +124,11 @@ xpack.security.authc.realms:
 ----------------------------------------
 
 The valid settings vary depending on the realm type. For more
-information, see {xpack-ref}/setting-up-authentication.html[Setting Up Authentication].
+information, see {xpack-ref}/setting-up-authentication.html[Setting up authentication].
 
 [float]
-===== Settings Valid for All Realms
+[[ref-realm-settings]]
+===== Settings valid for all realms
 
 `type`::
 The type of the realm: `native, `ldap`, `active_directory`, `pki`, or `file`. Required.
@@ -141,10 +142,31 @@ recommended when you configure multiple realms. Defaults to `Integer.MAX_VALUE`.
 Indicates whether a realm is enabled. You can use this setting to disable a
 realm without removing its configuration information. Defaults to `true`.
 
+[[ref-native-settings]]
+[float]
+===== Native realm settings
+
+For a native realm, the `type` must be set to `native`. In addition to the 
+<<ref-realm-settings,settings that are valid for all realms>>, you can specify  
+the following optional settings: 
+
+`cache.ttl`:: The time-to-live for cached user entries. User credentials are 
+cached for this period of time. Specify the time period using the standard 
+{es} <<time-units,time units>>. Defaults to `20m`.
+
+`cache.max_users`:: The maximum number of user entries that can live in the 
+cache at any given time. Defaults to 100,000.
+
+`cache.hash_algo`:: (Expert Setting) The hashing algorithm that is used for the 
+in-memory cached user credentials. For possible values, see 
+{xpack-ref}/controlling-user-cache.html[Cache hash algorithms]. Defaults to 
+`ssha256`.
+
+
 [[ref-users-settings]]
 
 [float]
-===== File Realm Settings
+===== File realm settings
 
 `cache.ttl`::
 The time-to-live for cached user entries--user credentials are cached for
@@ -163,7 +185,7 @@ all possible values. Defaults to `ssha256`.
 
 [[ref-ldap-settings]]
 [float]
-===== LDAP Realm Settings
+===== LDAP realm settings
 `url`::
 An LDAP URL in the format `ldap[s]://<server>:<port>`. Required.
 
@@ -393,7 +415,7 @@ table for all possible values). Defaults to `ssha256`.
 
 [[ref-ad-settings]]
 [float]
-===== Active Directory Realm Settings
+===== Active Directory realm settings
 
 `url`::
 A URL in the format `ldap[s]://<server>:<port>`. Defaults to `ldap://<domain_name>:389`.
@@ -605,7 +627,7 @@ the in-memory cached user credentials (see {xpack-ref}/controlling-user-cache.ht
 
 [[ref-pki-settings]]
 [float]
-===== PKI Realm Settings
+===== PKI realm settings
 
 `username_pattern`::
 The regular expression pattern used to extract the username from the
@@ -651,7 +673,7 @@ Defaults to `100000`.
 
 [[ref-saml-settings]]
 [float]
-===== SAML Realm Settings
+===== SAML realm settings
 `idp.entity_id`::
 The Entity ID of the SAML Identity Provider
 
@@ -915,10 +937,10 @@ cipher suites that should be supported.
 
 [float]
 [[ssl-tls-settings]]
-==== Default TLS/SSL Settings
+==== Default TLS/SSL settings
 You can configure the following TLS/SSL settings in
 `elasticsearch.yml`. For more information, see
-{xpack-ref}/encrypting-communications.html[Encrypting Communications]. These settings will be used
+{xpack-ref}/encrypting-communications.html[Encrypting communications]. These settings will be used
 for all of {xpack} unless they have been overridden by more specific
 settings such as those for HTTP or Transport.
 
@@ -961,7 +983,7 @@ Jurisdiction Policy Files_ has been installed, the default value also includes `
 
 [float]
 [[tls-ssl-key-settings]]
-===== Default TLS/SSL Key and Trusted Certificate Settings
+===== Default TLS/SSL key and trusted certificate settings
 
 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.
@@ -971,7 +993,7 @@ trusted along with the certificate(s) from the <<tls-ssl-key-settings, key setti
 for connections that require client authentication or when acting as a SSL enabled server.
 
 [float]
-===== PEM Encoded Files
+===== PEM encoded files
 
 When using PEM encoded files, use the following settings:
 
@@ -994,7 +1016,7 @@ that will be presented to clients when they connect.
 List of paths to the PEM encoded certificate files that should be trusted.
 
 [float]
-===== Java Keystore Files
+===== Java keystore files
 
 When using Java keystore files (JKS), which contain the private key, certificate
 and certificates that should be trusted, use the following settings:
@@ -1025,7 +1047,7 @@ Password to the truststore.
 Password to the truststore.
 
 [float]
-===== PKCS#12 Files
+===== PKCS#12 files
 
 When using PKCS#12 container files (`.p12` or `.pfx`), which contain the
 private key, certificate, and certificates that should be trusted, use
@@ -1082,7 +1104,7 @@ include::ssl-settings.asciidoc[]
 
 [[ssl-tls-profile-settings]]
 [float]
-===== Transport Profile TLS/SSL Settings
+===== Transport profile TLS/SSL settings
 The same settings that are available for the <<transport-tls-ssl-settings, 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
@@ -1096,7 +1118,7 @@ setting, this would be `transport.profiles.$PROFILE.xpack.security.ssl.key`.
 
 [float]
 [[ip-filtering-settings]]
-==== IP Filtering Settings
+==== IP filtering settings
 You can configure the following settings for {xpack-ref}/ip-filtering.html[IP filtering].
 
 `xpack.security.transport.filter.allow`::