Validating resources located at non public ip addresses
In addition to the IP address, the DHCP server on the NAT network also sends out additional configuration information that enables the virtual machine to operate automatically.
This information includes the default gateway and the DNS server.
The NAT device is connected to the VMnet8 virtual switch.
Virtual machines connected to the NAT network also use the VMnet8 virtual switch.
If you want the virtual machines running on the NAT network to access each other by DNS names, you must set up a private DNS server connected to the NAT network.
In general, any protocol using TCP or UDP can be used automatically by a virtual machine on the NAT network so long as the virtual machine initiates the network connection.
Additional protocol support has been built into the NAT device to allow FTP and ICMP echo (ping) to work completely transparently through the NAT.
Before any such communication can occur, the NAT device must set up a mapping between the virtual machine's address on the private NAT network and the host's network address on the external network.
When a virtual machine initiates a network connection with another network resource, this mapping is created automatically.
When data arrives from the external network for the virtual machine on the private network, the NAT device receives the data, replaces the network address with that of the virtual machine and forwards the data to the virtual machine on the virtual network.
This translation occurs automatically and requires minimal configuration on the guest and the host.
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Responses come back to the NAT device, which then forwards them to the virtual machines.