You can encrypt communication between your computer and the machine.
The communication is encrypted by IPSec. When IPSec is enabled, encryption is applied for all the applications by using IP protocols.
You can specify up to 50 hosts by their IP addresses. When a host that is not registered tries to access the machine, it is rejected. When you try to access a host that is not registered, the attempt is invalid.
Be sure to configure the machine in advance, before configuring your computer.
Memo
You must have a pre-shared key readied in advance.