I noticed that my network manager applet in the taskbar is displaying different IPs at Interface > Details > "IPv4 Primary Nameserver". So for example today I got 200.41.74.215, and after reboots 216.113.240.140, 200.180.46.180 etc. What exactly is showing me here, what IPs are those as I have a hard time finding out, why not my DNS server, maybe is a cosmetic issue but why is it changing and more importantly - should I be worried? How can I found out more?
Clearly my DNS servers are setup and properly displayed in Plasma's System settings > Network > Connections as 192.168.1.3 which is the IP of my router that runs unbound and serves requests. The IP of the machine in question is set statically, no DHCP on this one. And it seems that well... it is true, that is my DNS server:
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cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.1.3
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nmcli
DNS configuration:
servers: 192.168.1.3
interface: enp14s0
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nmcli device show enp14s0 | grep IP4.DNS
IP4.DNS[1]: 192.168.1.3