Talking of ARP, at least Linux has the problem that it blindly accepts whatever hardware address it finds in the ARP response -- be it the MAC broadcast address, or a multicast one. Not sure wheter other OSs are affected. I didn't find anything dangerous you can do with this, unless there's some really stupid IP stack that tries to forward IP packets that were sent to the MAC broadcast--that would indeed be network meltdown. But I haven't seen such a stack. I reported this to Alan a week or two ago, so I would assume that it has been fixed in the meanwhile :) Olaf -- Olaf Kirch | --- o --- Nous sommes du soleil we love when we play okirat_private | / | \ sol.dhoop.naytheet.ah kin.ir.samse.qurax
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