VirtualBox

Ticket #6992 (new enhancement)

Opened 4 years ago

Add protections again DHCP rogue activity

Reported by: UglyPercy Owned by:
Priority: major Component: network
Version: VirtualBox 3.2.4 Keywords:
Cc: Guest type: other
Host type: other

Description

With certain guest OS setups, it is very easy for the VB DHCP servers to turn into rogues, answering DHCP requests from other physical computers on a LAN (potentially many on a huge LAN). This is a very unpleasant phenomenon, potentially career-ending for the engineer in some environments.

If there is any way so, by default, restrict VB DHCP servers such that not only would they only serve requests seen on Host-Only interfaces, but would only serve requests actually generated by interfaces associated with local guest VM's, it would be very helpful (seems like a quick MAC address check would be 99% of the solution). That way, even confusing setups involving accidental guest OS bridging (e.g. Linux "brctl") between Host-Only and Bridged/NAT adapters would not cause LAN disasters.

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