Version: SG FLX
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Proxy based authentication
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The proxy based authentication enables you to use a single sign on (SSO) solution - which you might already have - instead of the Search Guard authentication backend.
Most of these solutions work as a proxy in front of Elasticsearch. Usually the request is routed to the SSO proxy first. The SSO proxy authenticates the user. If authentication succeeds, the (verified) username and its (verified) roles are set in HTTP header fields. The names of these fields are dependent on the SSO solution you have in place.