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Vista - Hyper-V Setup - Networking Question

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Old 06-16-2008   #1 (permalink)
NJC1


 
 

Hyper-V Setup - Networking Question

Hi,

I was wondering whether there are any best practice guidelines for the
initial setup of the current Hyper-V RC? My main question is regarding
network connectivity - can the Hyper-V parent partition be connected to the
internal network and be a domain member (for management and VM backup
purposes), even if the child partitions it hosts were connected to a
less-secure network such as a DMZ? I'm assuming this is not a recommended
configuration unless the VMs can be configured to have no access whatsoever
to the parent partition?

Thanks!

My System SpecsSystem Spec
Old 06-16-2008   #2 (permalink)
Bill Grant


 
 

Re: Hyper-V Setup - Networking Question

Best practice is to have nothing at all running in the parent partition
of a server running Hyper-V. That is the recommended configuration.

"NJC1" <NJC1@xxxxxx> wrote in message
news:524230FC-A448-49CF-832E-2F3DDC476E6A@xxxxxx
Quote:

> Hi,
>
> I was wondering whether there are any best practice guidelines for the
> initial setup of the current Hyper-V RC? My main question is regarding
> network connectivity - can the Hyper-V parent partition be connected to
> the
> internal network and be a domain member (for management and VM backup
> purposes), even if the child partitions it hosts were connected to a
> less-secure network such as a DMZ? I'm assuming this is not a recommended
> configuration unless the VMs can be configured to have no access
> whatsoever
> to the parent partition?
>
> Thanks!
My System SpecsSystem Spec
Old 06-16-2008   #3 (permalink)
NJC1


 
 

RE: Hyper-V Setup - Networking Question

Hi Bill,

Many thanks for the speedy response - I wasn't planning on running anything
apart from the Management Consoles for Hyper-V plus some agents for VM backup
and parent partition OS monitoring purposes (nothing too resource intensive).

"NJC1" wrote:
Quote:

> Hi,
>
> I was wondering whether there are any best practice guidelines for the
> initial setup of the current Hyper-V RC? My main question is regarding
> network connectivity - can the Hyper-V parent partition be connected to the
> internal network and be a domain member (for management and VM backup
> purposes), even if the child partitions it hosts were connected to a
> less-secure network such as a DMZ? I'm assuming this is not a recommended
> configuration unless the VMs can be configured to have no access whatsoever
> to the parent partition?
>
> Thanks!
My System SpecsSystem Spec
Old 06-17-2008   #4 (permalink)
Bill Grant


 
 

Re: Hyper-V Setup - Networking Question

Questions about DMZ operations can get tricky. The real point is that a
vm can only access a physical network through a physical NIC on the host. If
you have a vm connected to a DMZ you must have a NIC in the host connected
to that DMZ somehow. If you also have another NIC in the host connected to
some other network there is always a possibility of a leak from one network
to the other, no matter how slight the risk may be.

"NJC1" <NJC1@xxxxxx> wrote in message
news:01910F92-5A1B-4CBA-AF39-70B8EF70D062@xxxxxx
Quote:

> Hi Bill,
>
> Many thanks for the speedy response - I wasn't planning on running
> anything
> apart from the Management Consoles for Hyper-V plus some agents for VM
> backup
> and parent partition OS monitoring purposes (nothing too resource
> intensive).
>
> "NJC1" wrote:
>
Quote:

>> Hi,
>>
>> I was wondering whether there are any best practice guidelines for the
>> initial setup of the current Hyper-V RC? My main question is regarding
>> network connectivity - can the Hyper-V parent partition be connected to
>> the
>> internal network and be a domain member (for management and VM backup
>> purposes), even if the child partitions it hosts were connected to a
>> less-secure network such as a DMZ? I'm assuming this is not a recommended
>> configuration unless the VMs can be configured to have no access
>> whatsoever
>> to the parent partition?
>>
>> Thanks!
My System SpecsSystem Spec
Old 06-18-2008   #5 (permalink)
Dave Harry


 
 

Re: Hyper-V Setup - Networking Question

NJC1,

If you have _any_ device with two NICs with one connected to each zone (such
as a firewall), then there is also a possibility of a leak from one network
to the other, no matter how slight the risk may be.

So in your case, if TCP/IP is not actually bound to the host adaptor, then
your risk is fairly small.

--
Dave Harry

"Bill Grant" <not.available@xxxxxx> wrote in message
news:%23qLLInG0IHA.4848@xxxxxx
Quote:

> Questions about DMZ operations can get tricky. The real point is that a
> vm can only access a physical network through a physical NIC on the host.
> If you have a vm connected to a DMZ you must have a NIC in the host
> connected to that DMZ somehow. If you also have another NIC in the host
> connected to some other network there is always a possibility of a leak
> from one network to the other, no matter how slight the risk may be.
>
> "NJC1" <NJC1@xxxxxx> wrote in message
> news:01910F92-5A1B-4CBA-AF39-70B8EF70D062@xxxxxx
Quote:

>> Hi Bill,
>>
>> Many thanks for the speedy response - I wasn't planning on running
>> anything
>> apart from the Management Consoles for Hyper-V plus some agents for VM
>> backup
>> and parent partition OS monitoring purposes (nothing too resource
>> intensive).
>>
>> "NJC1" wrote:
>>
Quote:

>>> Hi,
>>>
>>> I was wondering whether there are any best practice guidelines for the
>>> initial setup of the current Hyper-V RC? My main question is regarding
>>> network connectivity - can the Hyper-V parent partition be connected to
>>> the
>>> internal network and be a domain member (for management and VM backup
>>> purposes), even if the child partitions it hosts were connected to a
>>> less-secure network such as a DMZ? I'm assuming this is not a
>>> recommended
>>> configuration unless the VMs can be configured to have no access
>>> whatsoever
>>> to the parent partition?
>>>
>>> Thanks!
>
My System SpecsSystem Spec
Old 06-18-2008   #6 (permalink)
Bill Grant


 
 

Re: Hyper-V Setup - Networking Question

Yes, I agree. There is no real reason to know or care whether the
machines and networks are virtual or physical. If a network design is
basically sound, it really doesn't matter. A network is a network!

"Dave Harry" <DaveHarry@xxxxxx> wrote in
message news:OevGuCQ0IHA.3464@xxxxxx
Quote:

> NJC1,
>
> If you have _any_ device with two NICs with one connected to each zone
> (such as a firewall), then there is also a possibility of a leak from one
> network to the other, no matter how slight the risk may be.
>
> So in your case, if TCP/IP is not actually bound to the host adaptor, then
> your risk is fairly small.
>
> --
> Dave Harry
>
> "Bill Grant" <not.available@xxxxxx> wrote in message
> news:%23qLLInG0IHA.4848@xxxxxx
Quote:

>> Questions about DMZ operations can get tricky. The real point is that
>> a vm can only access a physical network through a physical NIC on the
>> host. If you have a vm connected to a DMZ you must have a NIC in the host
>> connected to that DMZ somehow. If you also have another NIC in the host
>> connected to some other network there is always a possibility of a leak
>> from one network to the other, no matter how slight the risk may be.
>>
>> "NJC1" <NJC1@xxxxxx> wrote in message
>> news:01910F92-5A1B-4CBA-AF39-70B8EF70D062@xxxxxx
Quote:

>>> Hi Bill,
>>>
>>> Many thanks for the speedy response - I wasn't planning on running
>>> anything
>>> apart from the Management Consoles for Hyper-V plus some agents for VM
>>> backup
>>> and parent partition OS monitoring purposes (nothing too resource
>>> intensive).
>>>
>>> "NJC1" wrote:
>>>
>>>> Hi,
>>>>
>>>> I was wondering whether there are any best practice guidelines for the
>>>> initial setup of the current Hyper-V RC? My main question is regarding
>>>> network connectivity - can the Hyper-V parent partition be connected to
>>>> the
>>>> internal network and be a domain member (for management and VM backup
>>>> purposes), even if the child partitions it hosts were connected to a
>>>> less-secure network such as a DMZ? I'm assuming this is not a
>>>> recommended
>>>> configuration unless the VMs can be configured to have no access
>>>> whatsoever
>>>> to the parent partition?
>>>>
>>>> Thanks!
>>
>
My System SpecsSystem Spec
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