How to configure NAT on a virtual machine on an ESX server?

I'm used to VMWare Workstation and using VM NAT to fence off my WinXP VM image and my Win2003 VM image from the rest of the world.

Now I'm trying to do the same thing with ESX and I'm lost. I figured out that you can't configure ESX to NAT a VM image, but I gather it's possible to do, but so far I failed to understand all the results I came across with Google.

Would anyone be able to explain how to NAT my workstation and server VM image with ESX server?
Preferably in a manner a dummy like me can understand it?

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Well... you could always define a new network in esx, and put both machines on it.  Then you could have a third machine with two networks on it, the new network and the actual network, and route everything through that.  That would require a second real IP on your esx server through for the third router/nat machine.

Just an idea.

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Sebastian_StraussAuthor Commented:
Hmm... how do I define a new network on the ESX server?

just create a virtual switch and don not connect it to a physical nic.  Add a nic to the machines you want to and then add it to that vswitch.
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