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I have got DNS Bind9 server installed on my VirtualBox Debian host. Another host from the same network has the nameserver address set as IP_OF_MACHINE_WITH_BIND. This was working ok for some time. Then I tried to create my own local zone to assign domain names to my virtual hosts. But I have set something wrong: now my DNS server is not resolving any hosts. I tried to turn local zone settings off in named.conf.local, but it didn't helped.
The requests that hosts send to DNS server really reach it. I can see the messages of this kind in the logs:
client IP_OF_PINGER#some_counter query: www.google.com IN A + (IP_OF_DNS_SERVER)
Yes, I have set up the forwarders variable in named.conf.options, of course.
A question is: can you suggest me a methodology to debug my server's configuration and find out whats wrong with the settings? Which logs I should enable and how? How can I understand why server is not directing my request to provider's DNS servers, mentioned in named.conf.options as 'forwarders'?