NTLM authentication through Apache TrafficServer version 5.3.1 appears to be broken, with the authentication prompt being displayed repeatedly.
Version 4.1.2 (using the same configuration files) works successfully.
- HTTPS does not resolve the issue in version 5.3.1 like it does with version 4.1.2
- proxy.config.http.share_server_sessions is set to 0 (default: 2)
- proxy.config.http.auth_server_session_private is set to 1
This issue appears to be related to
TS-1491 identified in the 3.2 releases.