![]() ![]() The generic form will be a.b.c.0/NAT Subnet Prefix Lengthįrom the above, for this example, we'll use 192.168.0.0/24įor our example, run the following to setup the NAT network: New-NetNat -Name MyNATnetwork -InternalIPInterfaceAddressPrefix 192.168.0.0/24Ĭongratulations! You now have a virtual NAT network! To add a virtual machine, to the NAT network follow these instructions. InternalIPInterfaceAddressPrefix - NAT subnet prefix describes both the NAT Gateway IP prefix from above as well as the NAT Subnet Prefix Length from above. You'll use this to remove the NAT network. Name - NATOutsideName describes the name of the NAT network. In order to configure the gateway, you'll need to provide information about the network and NAT Gateway: Here is the generic command: New-NetNat -Name -InternalIPInterfaceAddressPrefix Run the following to create the NAT Gateway: New-NetIPAddress -IPAddress 192.168.0.1 -PrefixLength 24 -InterfaceIndex 24Ĭonfigure the NAT network using New-NetNat. InterfaceIndex - ifIndex is the interface index of the virtual switch, which you determined in the previous step. Common values range from 24 to 12 depending on how many IPs need to be attached to the NAT.Ī common PrefixLength is 24 - this is a subnet mask of 255.255.255.0 The subnet prefix length will be an integer value between 0 and 32.Ġ would map the entire internet, 32 would only allow one mapped IP. PrefixLength - NAT Subnet Prefix Length defines the NAT local subnet size (subnet mask). For example if the guest VMs use IP range 172.16.0.0, then you can use an IP address 172.16.0.100 as the NAT Gateway. This IP address is in the range of addresses used by the guest virtual machines. 1, it usually is (based on prefix length). While the final position doesn’t have to be. ![]() IPAddress - NAT Gateway IP specifies the IPv4 or IPv6 address to use as the NAT gateway IP. In order to configure the gateway, you'll need a bit of information about your network: Here is the generic command: New-NetIPAddress -IPAddress -PrefixLength -InterfaceIndex Take note of its ifIndex to use in the next step.Ĭonfigure the NAT gateway using New-NetIPAddress. The internal switch will have a name like vEthernet (SwitchName) and an Interface Description of Hyper-V Virtual Ethernet Adapter. ![]() VEthernet (intSwitch) Hyper-V Virtual Ethernet Adapter 24 Up 00-15-5D-00-6A-01 10 Gbps Name InterfaceDescription ifIndex Status MacAddress LinkSpeed Your output should look something like this: PS C:\> Get-NetAdapter You can find the interface index by running Get-NetAdapter New-VMSwitch -SwitchName "SwitchName" -SwitchType Internalįind the interface index of the virtual switch you just created. Open a PowerShell console as Administrator.Ĭreate an internal switch. Let's walk through setting up a new NAT network. Basically, a NAT uses a flow table to route traffic from an external (host) IP Address and port number to the correct internal IP address associated with an endpoint on the network (virtual machine, computer, container, etc.)Īdditionally, NAT allows multiple virtual machines to host applications that require identical (internal) communication ports by mapping these to unique external ports.įor all of these reasons, NAT networking is very common for container technology (see Container Networking). Network Address Translation (NAT) is a networking mode designed to conserve IP addresses by mapping an external IP address and port to a much larger set of internal IP addresses. NAT gives a virtual machine access to network resources using the host computer's IP address and a port through an internal Hyper-V Virtual Switch. For additional details on the Windows NAT (WinNAT) implementation, capabilities, and limitations, please reference the WinNAT capabilities and limitations blog NAT Overview Note: Currently, you are limited to one NAT network per host.
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