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https://blog.it-kb.ru/2016/10/26/configuring-basic-and-kerberos-authentication-with-sso-single-sign-on-for-the-apache-web-server-using-sssd-and-pam-service-for-authorization/
Настройка Kerberos аутентификации с SSO на веб-сервере Apache с помощью SSSD