On Jul 5, 2011, at 6:58 AM, Tony Finch wrote:
Keith Moore <moore(_at_)network-heretics(_dot_)com> wrote:
Yes, but rDNS PTR lookups always have been pretty much meaningless
anyway, and will only get worse in IPv4 due to LSN.
Reverse DNS for an LSN is just as informative as automatically populated
reverse DNS (and much more convenient than a whois lookup).
correct, in that both are meaningless. but I think the percentage of lookups
that return meaningful information will decrease - though more due to address
space exhaustion than LSN, I suppose.
what LSN will decrease is the correlation between source IP address and source
host, making any effort to associate a reputation with said addresses less
valid.
Keith
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