Attempting to create a new ArcGIS Server site fails, and the following error is returned:
Error: The server was unable to access the URL '<https://machinename.domain.com:6443/arcgis/services>'. Please check your firewall and security settings. For more information, see the ArcGIS Server help topic ports used by ArcGIS Server. You can access this topic in the table of contents by navigating to Administering ArcGIS Server > Securing your ArcGIS Server site > Configuring a secure environment for ArcGIS Server.
ArcGIS Server is configured on a machine with multiple network interface controllers (NIC) cards, and is accessing the site using a fully qualified domain name instead of the machine's IP address. In this scenario, the IP address or hostname of the server must be identified before creating a new ArcGIS Server site.
Use the hostname.properties file, and specify the hostname as the machine's IP address.