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On 20/02/2026 20.36, Tatsuya Jinmei via dns-operations wrote:
Thank you for the prompt response. Yes, I know the practice of
synthesizing NXDOMAIN. That's all about RFC6303.
My question was about the missing EDNS OPT RR in the synthesized
response. It's good to know that it's juse likely a bug.
The SOA is also useful in such responses. For caching. But I expect
it's mainly risk for CloudFlare; they might provoke too frequent
retries/refreshes.
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