A Virtual Host has to be bound to an IP address. This is required for proper operation of your virtual host.
Here is where you can enter in the IP address and port of your new Name Virtual Hosts.
To add a new host select the port from the pull-down menu and enter in the IP address you want. The port pull-down menu gives you two selections. Port 80 for normal connections and 443 for secure connections. Choose accordingly. Click the Add New IP button after each IP address your your new host will be added.
To delete a named virtual host simply click on the IP address of it.