How do I simulate a WAN inside a LAN for remote office server setup?

[jasonsfa98]

I need to send 3 vmWare ESXi servers (hosts) to thee locations around the world. Each host will have 3-5 guest VMs performing various tasks. Each host will live behind a firewall configured with a branch office VPN tunnel back to our HQ. Each remote office will have it's own private network configured so that it does not match any other IP/Subnet of other remote offices. Pretty basic.

I want to simulate the WAN environment so that I can setup all the guest VMs here before sending them off to their future homes. Specifically, I want to test communication from server-to-server and make sure they can talk while on different subnets. I know that the firewall/VPN setup will allow this but I'd like to test it before it's thousands of miles away.

HQ Network

172.16.0.0/16

Remote Office Network 1

192.168.1.0/24

Remote Office Network 2

192.168.2.0/24

Remote Office Network 3

192.168.3.0/24

Remote Office Network 4

192.168.4.0/24

[iw123]

You might want to look at setting something up with some virtual routers, using something like Vyatta.

[Busbar]

you can deploy a 2 Windows Machines with 2 NICs and configure routing between them, if you want to go fancy you can try doing with with Cisco simulator like GNS3