nanog mailing list archives

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


From: Fernando Gont <fernando () gont com ar>
Date: Wed, 26 Jan 2011 04:43:52 -0300

On 25/01/2011 11:29 p.m., Roland Dobbins wrote:
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.

+1

Thanks,
-- 
Fernando Gont
e-mail: fernando () gont com ar || fgont () acm org
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1






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