Without a DNS server #4
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We thought about doing exactly this at first, but then realised that this won't catch incoming DNS requests via TCP. |
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Fair enough, I understand. (Also, not having a DNS server prevents to return responses with an ultra-short TTL so you don't master the caching of the SERVFAIL.) |
Well, as a unique subdomain is generated for each check, caching shouldn't be an issue. |
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Not very important but it can help: how to do it without a DNS server