Re: [dnsext] Fwd: RFC 2308 & RFC 4035

[John Levine <[e-mail]>]

>> ... If the zone is a DNSBL, there will be a whole lot of nxdomain
>> queries, particularly in an IPv6 world where spamware hops to a new IP
>> on every message.
>
>i expect that most dnsbl's who evolve into ipv6 will also evolve a /64
>"wildcard" strategy to cope with malware-controllable low order bits.

I expect that WLs will be more important than BLs, but they both have
the same cache blasting problem if there's a different query for every
IP.

>but i also agree that the importance of negative caching and synthetic
>nxdomains is usually underestimated and will rise as the network grows.

Right.

R's,
John