For each virtual switch go to properties and change 'MAC Address Changes' to reject for the switch and each port group. Fix Text (F-69207r1fix) From the vSphere Client go to Configuration > Networking > vSphere Standard Switch. When the Mac address changes option is set to Accept, ESXi accepts requests to change the. If the 'MAC Address Changes' policy is set to accept, this is a finding. This option allows virtual machines to receive frames with a Mac Address that is different from the one configured in the VMX.
Its just that the host sees all vms with the same mac address. Each vm though sees each other with distinct mac addresses. When I look into the arp table of the host (no spoofing going) the mac address of all vms are the same as the host. Notes: I have confirmed with Wireshark that the first packet (ARP Request) gets on the vm machine (2) with the Source MAC Address Field REALLY spoofed. Selected product version: The security policy of a virtual switch includes a MAC address changes option. In a bridged set up each vm do have their 'own mac addresses sort of. The strange part is that the vm machine (1) receives that. I am facing a situation that i dont know if it is a normal behavior from ARP Protocol or some another problem.ġ- A vm machine (1) sending an "ARP Request" to another vm machine (2) with Spoofed Source MAC Address field (generated with Scapy).Ģ - The vm machine (2) receives that "ARP Request" with the Source MAC Address field Spoofed and RESPONDS that with an "ARP Reply". I am programming with Python and his partner Scapy.
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