Private network with Internet access

Hello,

   Using WS 9. Trying to build an isolated 'private' network that still has access to the Internet for testing purposes? I have built a VM that has AD, DNS, and DHCP installed. Wondering if it's doable to isolate this VM from the corporate LAN, but allow it to have access to the Internet to d/load patches/security fixes?

I have created the 'private' network as follows (VMnet2):

Thank you

BC