I'm on a secure network and when a non-authorized MAC address is plugged in the switch kills the network port and after a brief lecture IT resets it. VirtualBox seems to assign a different MAC address to the Ubuntu guest image which is causing a security violation.
Is there a way to force the guest Ubuntu and VirtualBox to use the same MAC address as the Windows host to avoid this problem?
please ref this http://ccm.net/faq/40897-virtualbox-how-to-refresh-the-mac-address-of-a-virtual-machine NAT will not send ethernet frame with new MAC address. Please check weather the network uses other security setup like Network Access Control(NAC).
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