Vista - Help - W2K3 Host, VM Networking Problem

I have a host machine with two interfaces. One goes to the Internet, the
other goes to an internal LAN. The host

machine runs Virtual Server. There are two virtual networks, one for each
physical interface.

The host machine is connected directly to the Internet in one interface and
to the LAN on another interface.

I want to set up a VM to act as a RRAS server, so it is connected directly
to the Internet, and LAN clients use it

as a gateway.

On the host machine, running W2K3 with VS2005 R2, I have disabled everything
except for "Virtual Machine Network

Services" on the Internet interface.

On the VM, running W2K8, I have configured that interface to have a static
ip address, gateway, and DNS servers to

access the Internet, just as the host machine would have configured to
access the Internet on that interface.

I also gave it a static internal LAN address.

The problem is this:

The VM cannot access the Internet. The settings are 100% correct. If I try
to ping an Internet IP address I get

"Destination host unreachable".

If I enable IPV4 on the host machine and give it a public Internet address,
and give the VM a different public

Internet address, then this is what happens:

The VM can ping the host using the host's public Internet address. It can
also ping itself with it's public

Internet address.

The host can ping itself with it's public Internet address. It cannot get a
response from the VM with the VM's

public Internet address.

Windows Firewall is off on both the host and the VM.

What is going on?

Asty4

"Asty4" <Asty4@xxxxxx> wrote in message
news:1454E5FE-4A29-4A34-87B7-E05CC51A5F99@xxxxxxThere isn't really enough info here to give you a useful answer. How
does the host machine connect to the Internet? How does it get its network
config?

If the host gets its network config from an ISP, the ISP will probably
only allow that particular IP address to access the Internet. It will not
accept some other IP you dream up. What you will need to do is make the
Internet connection from the public NIC of your vm, not from the host.

If you host gets its network config from a DHCP server on a home or corp
network you should not need to give it a static IP. It will get its config
from DHCP, just as the host does.

That is the first problem. The router must be able to access the
Internet from its public NIC. Once that works you should be able to install
RRAS and configure it as a NAT router to let your LAN clients access the
Internet through this router (as long as they are set to use this machine as
their default gateway). You can even set up the host to access the Internet
through this router (using its LAN interface).

OK. I will clarify.

The host machine has been running RRAS. It has the public interface, and the
private interface. The public interface has static IP settings and goes
directly to the Internet (not to an ISP). The private interface goes directly
to a LAN.

Rather than have the host machine run RRAS, I want to run RRAS in a VM. That
means that I want to set the VM as the gateway on the network, and I want all
traffic into the LAN to flow through the VM, and then onto the Internet.

I put the exact same settings that I use on the host, into the VM. Then I
disable IPV4 and everything except for "Virtual Machine Network Services"
that is bound on that public NIC interface on the host computer. So, the host
machine does not communicate over IPV4 or anything to the public interface.

However, the VM does not get any packet flow onto the Internet with this
configuration. If I use the exact same settings in the IPV4 config for the
host on the public interface, the host can communicate fine. But, if I do
this on the VM, the VM does not get packet flow.

If I assign another IP address to the Host's public interface, and another
to the VM's public interface (Two different public IP addresses), the host
has Internet connectivity, but the VM still doesn't work.

When both the host machine and the VM have public IP Addresses assigned, I
can ping the host machine on the Internet, but i cannot ping the VM. If I try
to ping out from the VM, I get "destination host unreachable", to an ip
address, hostname, or to the gateway.

Asty4

"Bill Grant" wrote:

"Asty4" <Asty4@xxxxxx> wrote in message
news:70B2374E-9426-4CBF-BDBA-1A340CFED080@xxxxxxThat is very odd. If the NIC in the guest is connected to the virtual
network linked to the physical NIC in the host it should behave in exactly
the same way as the host does.

Does this NIC connect to a switch? Some switches will only allow one MAC
address per switch port. That is the only reason I can think of for what you
are seeing. It should work and it works for me.