How to make a virtual machine pingable from the server it is running on?

Question

Computer networks

On a server running on WS 2008R2 on hyper-v, a virtual machine is running, on which WS2008R2 is also installed, the virtual adapter type of the virtual machine is external, the checkbox "Allow sharing this network adapter with the control OS" is not checked.
The server is connected to the Internet with one physical adapter. There are two static ip addresses. One of the addresses belongs to the server, the second virtual machine. The problem is that both the server and the virtual machine can access the Internet, they can be pinged from other computers, but they do not see each other (and regardless of whether I am accessing by ip or by domain name), ping as a server from a virtual machine, and a virtual machine from the server is impossible.

Answer 1

In your case, 90% of the problem is related to the firewall settings. Why does it seem to me that the Hyper-V host and guest OS are not in the same domain? And no one changed the default settings ...
For the test, disable the firewall on the machine you are trying to ping.

Answer 2

Firstly, the checkbox Allow sharing this network adapter with the control OS "is set in the settings of the virtual switch, and not the virtual adapter. You probably have more than one virtual switch configured. Because ..
Secondly, the checkbox is not accidentally called" Allow sharing this network adapter of the host OS". One physical network interface without this checkbox would cut off your ability to manage the server with hyper-v and give the interface exclusively to the virtual machine.
There is really one option. Maybe you have some kind of dell or ibm with IPKVM included in a separate network interface They have very tricky software that allows Windows to use this interface.
Take a close look at how many virtual switches you have. If even so 1 and without a checkmark, then it's just magic.
If you don’t understand, then you can simply create an internal switch, add a second interface to the virtual machine. Assign addresses 192.168.x.x and communicate on them.
As a matter of fact.

Answer 3

Make a trace and show please