![]() Otherwise, this mode operates exactly the same as NAT host-to-guest access can only be accomplished via port forwarding (though, this time you’ll have to choose which VM to forward to). This enables guest-to-guest access via a virtual switch, much like how a computer plugged into your router’s first ethernet jack can access a machine plugged into the second jack. NAT Network mode follows the same principle of NAT, but instead of logically separating each VM into its own network, NAT Network uses one network for all VMs configured on the same NAT Network (though nothing stops you from having multiple separate networks). In fact, each machine can have the exact same private IP address, because it all gets translated out in the end. One VM cannot access services running on another virtual machine. In NAT mode, the internal router is configured for each virtual machine. You should choose NAT if you need basic internet access, but still want to keep the VM separate from other machines on your network. While all other directions of communication are possible, NAT mode does not give guest-to-host access. You can also expose guest services to the openinternet by port forwarding your router to forward a port to the host machine, which will forward the connection further to the guest. If this seems like an issue, Bridged mode is a potential solution. This is both a good and bad thing-on one hand, it’s far more secure this way, as even local devices can’t access the VM’s services, but manually opening ports may not be what you want. If you want an application to be accessible, you must port forward the ports that it runs on, and bind them to the host’s local ports. NAT mode does not give the host (or any other local machine) access to services running on a VM, in much the same way that a service running on your local network isn’t publicly accessible from the open Internet. As far as the VM is aware, it’s exactly like a device on a home network. In the end, this enables internet connectivity for the virtual machine. Packets sent from the VMs will go through two translations-first, to translate the VM’s private IP address into the host’s private IP address, and then to translate the hosts’s private address into your gateway’s public address. In a way, this is exactly like putting your VMs behind an additional router. (Technically, it uses an extension of NAT, called Port Address Translation, but the concept is the same.) When you connect to an external service, your router translates your internal IP address into the public-facing external IP you use to communicate with. Your router will have an IP assigned by your ISP, such as 73.45.123.123. For example, your computer may have IP address 192.168.1.5 on your home network. ![]()
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