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     Re: [nocol-users] nsmon - monitoring DNS caches


The reason that these were turned off is so that an authoritative server
does not do recursion. The prime goal for nsmon was to monitor nameservers
for the domains for which they were authoritative.


Paul Johnston wrote:
> Hi,
> I'm using Nocol to monitor a couple of DNS servers. They're not masters
> for any domain - just caches for dial-in users. The problem is that
> nsmon sends a query with RES_RECURSE and RES_DNSRCH both turned off.
> This means that if the domain we test for is cached then the test is
> successful, otherwise the servers appear to be down. I've just
> recompiled nsmon so it sends queries with these options turned on, and
> this seems to fix it. What I'm not sure about is why these options were
> turned off in the first place? Is there some subtle gotcha?
> Paul