Using IPv6 with prefixes shorter than a /64 on a LAN

Roland Dobbins rdobbins at
Wed Jan 26 02:29:34 UTC 2011

On Jan 26, 2011, at 8:12 AM, Fernando Gont wrote:

> Also, the claim that "IPv6 address scanning is impossible" is generally based on the (incorrect) assumption that host addresses are spread
> (randomly) over the 64-bit IID. -- But they usually aren't.

It also doesn't take into account hinted scanning via routing table lookups, whois lookups, and walking reverse DNS, not to mention making use of ND mechanisms once a single box on a given subnet has been successfully botted.

Roland Dobbins <rdobbins at> // <>

Most software today is very much like an Egyptian pyramid, with millions
of bricks piled on top of each other, with no structural integrity, but
just done by brute force and thousands of slaves.

			  -- Alan Kay

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