[dns-operations] TC=1 with RA=0 from a recursive resolver

Doug Barton dougb at dougbarton.email
Tue Mar 22 09:23:37 UTC 2016

On 03/22/2016 01:16 AM, Florian Weimer wrote:
> * Mark Andrews:
>> That's what RFC 1034 says.
>>     - The recursion available, or RA bit, is set or cleared by a
>>       name server in all responses.  The bit is true if the name
>>       server is willing to provide recursive service for the client,
>>       regardless of whether the client requested recursive service.
>>       That is, RA signals availability rather than use.
>> If RD effects RA then the server is broken.
> But RFC 1034 does not reflect current practice.

... which is part of the problem, not part of the solution. :)


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