I am trying to determine how to do a health check against backend servers in HAProxy with NTLM authentication (Windows IIS servers). As I understand, it is ‘multistage’ in that it will do a ‘basic’ auth first, return a 401, and then try again with different headers.
This is baked into the http monitor in f5’s BIGIP as I recently learned, it tries basic auth first, and then failing that attempts NTLM. Is there a way to mimick this in HA-Proxy?
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