You can add a network segment to build a private network by using VPS in the [Network] on the left-side menu.
The network segment which set up at the adding private network section will add.
If accessing by VPS, move to the [Network] on the left-side menu, then execute the operation from the [Private network] list.

【Address class】
You can select an address class from [Class A], [Class B], or [Class C].

【Network address】
You can set up the network address of the segment to add.
The number of private IP addresses can be used in the segment vary depending on the network address settings.
You can specify a prefix value from of 21 to 27.