On Mon, Jan 4, 2016 at 1:21 PM, <valdis.kletni...@vt.edu> wrote: > On Mon, 04 Jan 2016 11:59:40 -0800, Owen DeLong said: > > > These numbers might be slightly pessimistic because 3XX series responses > are > > not counted as good. > > They may be a *lot* more than slightly pessimistic - consider the case of > any site that uses 3xx replies to redirect to a geo-IP based server rather > than doing it in DNS (which has the problem that you're redirecting based > on the IP of the DNS server that asked, which will fail miserably for > anybody using 8.8.8.8 as their DNS server)
While I agree with your general sentiment about 3xx responses (often used to redirect example.com to www.example.com) I think your concerns about 8.8.8.8 are over-stated. 8.8.8.8 is deployed in many locations, which gives DNS-based geolocation a decent chance of working. And it also supports the client subnet EDNS0 extension ( https://tools.ietf.org/html/draft-ietf-dnsop-edns-client-subnet-06) for more fine-grained balancing. Damian
