DNS queries go to primary and secondary DNS servers at the same time
robertocarna36 at gmail.com
Mon Dec 16 19:13:11 UTC 2019
I have a primary and a secondary BIND9 DNS servers, working as master /
slave with zone transfers between them.
I have several Linux machines (desktops and servers) with Debian and Mint.
I've realized, using TCPDUMP at DNS1 and DNS2, that all DNS queries from
Linux machines go to both DNS1 and DNS2 BIND servers at the same time.
In all Linux machines we have setup the DNS resolution using
But when the from Linux clients I execute:
$ host <some_fqdn>
I can see UDP traffic arriving to DNS1 and DNS2 at the same time.
What can be the problem ? Because I expect only DNS traffic going to DNS1
because it is before DNS2 in /etc/resolv.conf.
Thanks a lot !!!
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