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I can guarantee you that popular DNS resolvers (think 500b+ transactions a day) do have this feature! Don't want to say much more due to it being my job, and I

by jasimp 10y ago

I can guarantee you that popular DNS resolvers (think 500b+ transactions a day) do have this feature! Don't want to say much more due to it being my job, and I don't want to give away too much. EDIT: https://www.google.com/patents/US8583801 https://www.google.com/patents/US8583801

imsofuture 10y ago
What is the point of this comment?
- bhauer 10y ago
  FWIW, since the comment was a reply to my message above: It provided value by answering my question concerning serious downsides to providing optional post-TTL last-known-good caching within a DNS resolver. The answer is implicit in that a major DNS resolver provides exactly this functionality.
  - jasimp 10y ago
    Thank you :) A little more information, considering it is public. (I had to double check if it was) https://www.google.com/patents/US8583801 https://www.google.com/patents/US8583801
pyvpx 10y ago
you mean opendns?
- jasimp 10y ago
  No I mean ISP's that run their own DNS resolvers.