VMware ESXi: Setting up NAT with a linux virtual machine


other than the Workstation, VMware ESXi does not has the functionality to “NATting” virtual machines network traffic into a public network.

My approach to implement NAT is a virtual machine with a slimmed-down (Debian) Linux.

These virtual machine has two network interfaces. The first interface is connected to a vSwitch called “Public LAN” with access to the public LAN, the second interface is connected to a vSwitch which has no physical adapter attached to and is called “NAT Network”. On the NAT interface a DHCP server is assigning IP Addresses.
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VMware: Virtual maschine LAN Interface disconnected

Last week a customer had the problem that a virtual machine uses a NAT Network connection but the NIC Adapter in the virtual machine is in disconnected state.


Windows IP Configuration

Ethernet adapter LAN-Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : localdomain

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VMware: Changing network settings in VMware Player 5

In previous version of VMware Player the NAT and the “Host only” network settings could be change by vmnetcfg.exe.

Since VMware Player 5 this tools is no longer a part of the installation, but vmnetui.dll is available. You can start the virtual network editor using the Windows rundll32.exe.

Open a command line and change  to the VMWare Player installation directory. This command bring the virtual network editor back:

rundll32.exe vmnetui.dll VMNetUI_ShowStandalone


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