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A comment on Ask HN: How did internet discover my subdomain?. Parent comment

Re:Ask HN: How did internet discover my subdomain? by arccy on Thursday March 06, 2025 @07:20PM (#43286394)
maybe your server responded to a plain ip addressed request with the real name...
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Re:Ask HN: How did internet discover my subdomain? by averageRoyalty on Friday March 07, 2025 @12:22AM (#43287546)
Host header is a request header, not a response one, isn't it?
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Re:Ask HN: How did internet discover my subdomain? by fc417fc802 on Friday March 07, 2025 @03:21AM (#43288223)
He said he used a wildcard cert though. So what part of the response would contain the subdomain in that case?
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