Tech Support > Microsoft Windows > Windows Server > Hyper-V, RAAS woes. . . Please help
Hyper-V, RAAS woes. . . Please help
Posted by Noah Wang on March 27th, 2008


My Hyper-V Guests cannot traverse through NAT to gain internet access.
I followed the guide by John Paul Cook linked her
http://sqlblog.com/blogs/john_paul_c...h-hyper-v.aspx

Here are the steps I took.
1. Install Windows 2008 Server
2. Setup static IP on physical network card
3. Deploy Hyper-V roles
4. In Virtual Network Manager created an internal only network
5. Define the newly created internal network with
IP: 192.168.1.1
Subnet 255.255.255.0
6. Deploy RRAS
7. Configure NAT
8. Pointed public interface to the physical network card
9. Pointed internet network to the internal network
10.Disable firewall on host in relation to the internal network

Guest OS receives DHCP from the RRAS
Guest OS is able to ping 192.168.1.1.
Guest OS is able to resolve internet DNS name.
Guest OS cannot traverse through NAT to the internet.

My primary goal is to enable Guest OS(s) ability to reach the internet.
But I have no idea what’s wrong with my configurations.

Posted by Bill Grant on March 27th, 2008


That setup works fine for me. You should not need to disable the firewall
on the host.

Can you ping the host's static public IP from the guest? Does it work if
you let the public NIC of the host get it IP address automatically?

"Noah Wang" <Noah Wang@discussions.microsoft.com> wrote in message
news:E412F270-7172-4996-BDC9-D67FD74A69A9@microsoft.com...

Posted by Noah Wang on March 27th, 2008


From the guest I am able to ping the host static Public IP.
Static IP is required as I have a static IP.

From the host I am able to ping www.news.com.
From the guest I get request time out when pinging www.news.com

"Bill Grant" wrote:

Posted by Bill Grant on March 27th, 2008


My guess is that it is a problem with a device driver. On the host, check
the NIC driver. Disable TCP offload if it is enabled.

"Noah Wang" <NoahWang@discussions.microsoft.com> wrote in message
news:34C5E491-CC2A-4F05-97D8-BD9B27286282@microsoft.com...

Posted by Noah Wang on March 28th, 2008


I tried your suggestion still stuck.
Here is the network card properties:
Should I try another ethernet card?
Is there one that is recommanded?

Intel(R) 8256V 10/100 Network Card
Adaptive inter-Frame Space Disabled
Flow Control Disabled
Interupt Moderation Enabled
Interup moderation rate Adaptive
IPv4Chesum Offload Disabled
Jumbo Packt Disable
Large send offload v2 (IPv4) Disabled
Large send offload v2 (IPv6) Disabled
Link Speed & duples Auto Negotiation
Local Administered Address Not Present
Log Link State Event Enabled
Priort & VLAN Enabled
Recieve Buffers 256
Recieve side Scaling Disabled
TCP Checksum Offload (IPv4) Disabled
TCP Checksum Offload (IPv6) Disabled
Transmit Buffers 512
UDP Checksum Offload (IPv4) Disabled
UDP Checksum Offload (IPv6) Disabled
Wait for Link Auto Detect

Other VM network card
IP Checksum Offload (IPv6) Disabled
Network Address Not Present
TCP Checksum Offload (IPv4) Disabled
TCP Large Send Offload (IPv4) Disabled

"Bill Grant" wrote:


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