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"Unknown Host" when DNS resolves if host is offline

D | Last updated: Oct 27, 2022 04:55PM UTC

I am going through a SOCKS proxy and doing DNS through that SOCKS proxy. All machines in question can resolve offline-machine.example.com to an IP address. offline-machine.example.com cannot be reached, but the DNS is definitely working -- all machines involved agree where it is. But Burp is reporting the IP as "unknown host" (None of this lets me reach the machine, since it is offline. But it made debugging the issue difficult because the error message was incorrect.)

Liam, PortSwigger Agent | Last updated: Oct 28, 2022 10:55AM UTC