> On Nov 3, 2021, at 01:42, Kapetanakis Giannis <bil...@edu.physics.uoc.gr> 
> wrote:
> Anyway, I followed Stuart's advice of adding a second DNS server in 
> resolv.conf apart from 127.0.0.1
> which was my usual practice for caching servers. I see no harm on this.

I generally always run resolving and authoritative servers as pairs.  For 
authoritative servers, that’s obvious.  For resolving servers, it’s less 
obvious, but it’s so I can do maintenance on one of them (at a time) and not 
kill everything that uses them.

And if you run two resolving servers, point both of them at both of them. :-)

Sean


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