Ports required for Kerberos authentication are blocked. Kerberos authentication is required to authenticate clients using ...

Ports required for Kerberos authentication are blocked. Kerberos authentication is required to authenticate clients using Kerberos proxy on this server. For clients to communicate with the proxy, firewalls must allow HTTPS traffic (port 443 by default). The Kerberos proxy must be able to sendKerberos authentication protocol traffic via port 88, and Kerberos change password protocol traffic via port 464 to domain controllers.