Many month ago, I opened a bug in github about maximum header size. I’m using proxy authentication and we have many groups, so the roles_header can be quit long, and it reaches SG maximum values. So I opened a bug in github and it was resolved. But since all data has been removed, all git history i…

Not sure about the original issue but I guess you need to adjust http.max_header_size (which is a ES and not a SG config option because SG itselft does not have any limits with regards to max header sizes). Default is 8kB. See HTTP | Elasticsearch Guide [8.4] | Elastic for more information.

Search guard max header size

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Search guard max header size

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