Monitoring DNS server

[Bernd Wurst]

Hi.

I have found a rule to monitor a DNS server in general, but is there also a 
rule format to have monit check if a DNS server does return a valid reply?

Tonight, our DNS servers refused to load our master zone file (because of an 
error) and so the DNS server keeps running but does not reply to a query about 
our master domain. Monit thought it was up and running but it was useless.

Is there a way to monitor if DNS server XYZ does reply to a specific query 
with a specific reply. Would be great if this is possible. In the docs, there 
is no such example.

greets,
Bernd

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