[AusNOG] Google's solution to GeoIP for their Public DNS servers

[Scott Howard]

Not overly surprisingly Google obviously understands the issue that
their public DNS servers would have on the CDNs etc, and are proposing
a fix...

http://www.ietf.org/id/draft-vandergaast-edns-client-ip-00.txt

Ignoring the possible privacy implications people may claim exist
here, it's an interesting solution.  The biggest problem I see is that
it's relying on the caching nameserver to do a fair amount of the work
as cached responses now rely on a "netmask" returned by the upstream
server, and future queries that might have otherwise have hit the
cache will require a new lookup if the netmask doesn't match.

  Scott.