Re: [Add] Zone ownership in DNS server discovery

[Vittorio Bertola <[e-mail]>]

>     Il 10/09/2020 18:31 Tommy Jensen <jensen.thomas=[e-mail]> ha scritto:
> 
> 
>     Changing subject line to avoid the noise on Martin's single use case. This is a separate topic.
> 
>     >From the WG charter:
> 
>     > Define a mechanism that allows communication of DNS resolver
>     > information to clients for use in selection decisions. This could be
>     > part of the mechanism used for discovery, above
> 
>     If I know "doh.example.com" is authoritative for "foo.example.com", I may prefer to take *.foo.example.com queries directly to it instead of using an intermediary recursive. I consider this to be separate from policies such as "I perform filtering" because being authoritative or designated isn't a policy / requirement and I can still choose to use an intermediate recursive if I want.
> 
Who is "I"? Is it the client developer, or the user?
If it is the client developer, then choosing to ignore the recursor and go straight to the authoritative, circumventing whatever policy the recursor would apply, is indeed a policy choice, not very different from going to a recursor different than the system's; if this is not what the user wants, it will break user expectations; and in architectural terms, it creates one more source of unpredictable results by introducing another per-app (or per-OS) different behaviour.

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Vittorio Bertola | Head of Policy & Innovation, Open-Xchange
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