On 2021-04-22 16:44, Marco Pizzoli wrote:

I am afraid you did not get my point.

i dont know your solution then

rpz and qname can be problematic https://labs.ripe.net/author/wouter_de_vries/making-the-dns-more-private-with-qname-minimisation/

I needed to have Postfix to solve Internet DNS names, for obvious
reasons.

bind9 can have split dns views

At the same time, I needed to be able to solve Intranet DNS names:
monitoring server, backup server, etc...

dns split views is your frind there

Due also to some other constraints, I ended up relying on static
entries in /etc/hosts.

this file is only for when real dns server is down, not used when dns server is up

It was at that time my best bad option.

if you like more help please post more info on the real problem

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