So many people here will go though great lengths to protect themselves from fingerprinting and snooping. However, one thing tends to get overlooked is DHCP and other layer 3 holes. When your device requests an IP it sends over a significant amount of data. DHCP fingerprinting is very similar to browser fingerprinting but unlike the browser there does not seem to be a lot of resources to defend against it. You would need to make changes to the underlying OS components to spoof it.
What are everyone’s thoughts on this? Did we miss the obvious?
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Okay, I do recall that our software had a feature that could classify on "DHCP requested options’, but it was low-fidelity, unreliable. Ultimately, the software works best with known devices, and isn’t very good at reliably classing unknowns.
As you say, just the first few seconds of actual traffic from a device is so rich in terms of ID characteristics compared to DHCP.