On Jul 5, 2011, at 6:58 AM, Tony Finch wrote: > Keith Moore <mo...@network-heretics.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 _______________________________________________ Ietf mailing list Ietf@ietf.org https://www.ietf.org/mailman/listinfo/ietf
