Many users use a proxy with URL-based access control to secure access to Elasticsearch indices. For multi-search, multi-get, and bulk requests, the user has the choice of specifying an index in the URL and on each individual request within the request body. This can make URL-based access control challenging.
To prevent the user from overriding the index which has been specified in the
URL, add this setting to the
The default value is
true, but when set to
false, Elasticsearch will
reject requests that have an explicit index specified in the request body.