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Troubleshooting DNS

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by jhayesit 1 view

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hello for some reason when i go into nslookup debug and query my isp's dns for one of my web sites it resolves but i get a

non-authoritative answer

does anybody know what this means, and how i can troubleshoot it?

thanks,

2 replies

by aliz

that's a problem in the ISP dns configuration and not in your client side.

by churdoo

Actually this is not necessarliy a problem at all. "non-authoritative answer" simply means that the nameserver that's answering your query is not an authoritative nameserver for that domain ... i.e. it is not listed in an NS record in your domain's zonefile, and basically it had to rely on some other nameserver for ultimately answering the query.

As for troubleshooting, well again, may not be trouble. If you look at the whois record for your domain(s)and if your zonefile is configured consistently with the whois info, then querying the listed nameservers directly should respond as "Authoritative," and querying anything else would respond as non-authoritative.

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