Re: arp tell 0.0.0.0

kuznet@ms2.inr.ac.ru
Sat, 18 Dec 1999 17:55:48 +0300 (MSK)


Hello!

> But I don't believe that was it. It looked more like it thought that interface
> was the default route, but it didn't know who to send the packet to. So it was
> sending out arp packets requesting addresses for things all over the internet.

Yes. It is possible.

The funny observation is that it is legal.
If host does not know its address and send requests with zero address,
they look exaclty as DAD messages and, if target host is really present
on wire, it should answer with another arp request, containing the same
adresses and correct MAC address. Hence addressless peer updates its
ARP cache correctly. Nobody is offended, all are happy 8)8)

Certainly, dhcp should be fixed to avoid this, but it is not a big bug. 8)

Alexey

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