I want to implement strict DNS query in the specified order, but a prompt similar to NXDOMAIN or SERVFAIL can automatically query the next DNS server. Fallback can just achieve this function, but I need more than two DNS servers to check strictly in order. I tried to open different ports to nest, but I found that it failed. When something like NXDOMAIN or SERVFAIL appeared, he would only go directly to the last DNS server. I don't know if this is a bug or a fallback can only be used once. In any case, I hope fallback can add nesting functionality, thank you very much.
I want to implement strict DNS query in the specified order, but a prompt similar to NXDOMAIN or SERVFAIL can automatically query the next DNS server. Fallback can just achieve this function, but I need more than two DNS servers to check strictly in order. I tried to open different ports to nest, but I found that it failed. When something like NXDOMAIN or SERVFAIL appeared, he would only go directly to the last DNS server. I don't know if this is a bug or a fallback can only be used once. In any case, I hope fallback can add nesting functionality, thank you very much.