DOCS-14793 FIPS mode default behavior update

Author: ianf-mongodb

source/includes/fact-5.1-scram-sha-1-fips-default.rst

@@ -0,0 +1,10 @@
+Starting in MongoDB 5.1, instances running in 
+:ref:`FIPS mode <fips-overview>` have the 
+:ref:`SCRAM-SHA-1 authentication mechanism <authentication-parameters>`
+disabled by default. You can enable the :ref:`SCRAM-SHA-1 authentication
+mechanism <authentication-parameters>` with the
+:ref:`setParameter.authenticationMechanisms
+<set-parameter-authenticationMechanisms-code>` command.
+
+This change will not affect drivers which target MongoDB 
+:dbcommand:`setFeatureCompatibilityVersion` 4.0+.

source/reference/parameters.txt

@@ -51,6 +51,8 @@ Parameters
 
 .. |both| replace:: Available for both :binary:`~bin.mongod` and :binary:`~bin.mongos`.
 
+.. _authentication-parameters:
+
 Authentication Parameters
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -75,6 +77,8 @@ Authentication Parameters
    For example, to specify both ``PLAIN`` and ``SCRAM-SHA-256`` as the
    authentication mechanisms, use the following command:
 
+   .. _set-parameter-authenticationMechanisms-code:
+
    .. code-block:: bash
 
       mongod --setParameter authenticationMechanisms=PLAIN,SCRAM-SHA-256 --auth

source/release-notes/5.1-compatibility.txt

@@ -68,6 +68,11 @@ Auditing
 General Changes
 ---------------
 
+FIPS Mode Defaults SCRAM-SHA-1 Authentication to Off
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. include:: /includes/fact-5.1-scram-sha-1-fips-default.rst
+
 ``$mod`` Error Behavior
 ~~~~~~~~~~~~~~~~~~~~~~~
 

source/tutorial/configure-fips.txt

@@ -241,4 +241,6 @@ Select the tab below for your platform:
 Additional Considerations
 --------------------------
 
+.. include:: /includes/fact-5.1-scram-sha-1-fips-default.rst
+
 .. include:: /includes/extracts/4.2-changes-fips.rst