I have a Windows 8.1 Pro client and I’ve just installed a new instance of AVG Internet Security.
On my client I have the Hyper-V feature enabled with several guest VMs running These VMs are connected to the Internet via an external vSwitch which is bound to the hosts main Ethernet NIC.
Since installing AVG my guest VMs can no longer connect to any webpage
Running the diagnostics returns the error “website is online but isn’t responding to connection attempts”
In the AVG advanced firewall settings there is an option to allow all traffic from/to virtual machines, this must be enabled.
Open the AVG console and select the Firewall component
Open the Firewall settings (click the cog)
Select the Advanced settings option
Open the Expert mode
Navigate to the Advanced Settings and check the box next to “Allow any traffic from/to virtual machines supported by the firewall. Click Apply and OK to complete the reconfiguration.
The guest VM is now able to connect to the Internet.
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