I am intending to set up a standalone "DMZ" machine (a laptop) with its own wireless broadband modem. The modem is via USB and the laptop get a single IP to the outside world (just like the old 56kbps modem days with no routers). With DSL+router, I know I can set the VM to use bridged networking, and set up on the router to direct port 80 traffic to the VM's internal IP.
How do I get port 80 traffic to the VM? I prefer VMWare but if the only way is via Virtual Server 2005, that's ok as well.
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One might ask, what is the difference between letting the VM take the USB/network and NAT-ing that vs NAT-ing the physical host and sharing the connection with the world? At any point in time, I want the host and vm to both be addressible to the outside world, like what you would be able to do with a router and port forwarding setup.
So you want multiple hosts to be accessible from the Internet, is that right?
You could be very limited in what you can do. Typically you only get one public IP address, so if you want to run a web server on both the host OS and your VM, only one can use port 80 from the outside world.
However re-reading your original post I may have miss-understood. So is this your setup
VM<--> VM Host OS <--> Laptop w/USB wireless broadband modem <--> Internet
If so, then I don't think you can get the VM to get the public IP address assigned to it. This would require the laptop to act as a bridge and I don't think it can do that. What OS is running on the laptop?
Nice ascii diagram - spot on.
With a routed setup, there is only 1 static IP address anyway - but the router can point different ports to different internal machines, that's what I am trying to emulate. I am open to running ANY OS on the laptop. Do you think I could run some linux setup and ARP rules to map incoming ports to specific IP addresses within the NAT-ed VMWare virtual network?
If you ran Linux you could use iptables to do port forwarding. Most (I would guess 99%) of home routers run Linux, I know that that current Linksys WRT's and WAP's use Linux, I am 99% sure that D-Link does also.
However, most home WRT's are fairly inexpensive these days. If you got one you could still use your laptop as a laptop and do port forwarding.
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by: giltjrPosted on 2008-11-29 at 07:18:24ID: 23059925
If the DSL modem is setup for bridged mode and your VM OS is setup for bridged mode, then all you need to do is setup the VM for PPPoE (or whatever your DSL provide uses for the PPP connection).
However, the downside of this is that if you want your host OS, or any other computer to use the Internet all traffic MUST be routed through the VM and the VM must be doing NAT.