Authority Name
This is the name for your Certificate Authority / Host Certificate.

If this is the "Certificate Authority" screen, then you want to enter some name to indentify your CA in the box. This would normally be something like "Guardian Digital CA #001".

If this is the "Host Certificate" screen, then you want to enter the FQDN (fully qualified domain name) in the box. This would normally be something like "vpnserver.domain.com".