`resolvconf` changing current DNS. Netplan stict using nameserver

Question

I need to have my own DNS server in the corporate.
I have the following config set for netplan:

network:
    version: 2
    renderer: NetworkManager
    ethernets:
        eno1:
            dhcp4: yes
            addresses:
              - 192.168.1.240/24
            nameservers:
              addresses: [192.168.1.10]

At first I have the following on running resolvectl status after running sudo netplan apply:

Link 2 (eno1)
    Current Scopes: DNS
         Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 192.168.1.10
       DNS Servers: 192.168.1.10 192.168.254.112 192.168.254.113 192.168.254.114

But after a while I get the following:

Link 2 (eno1)
    Current Scopes: DNS
         Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 192.168.254.112
       DNS Servers: 192.168.1.10 192.168.254.112 192.168.254.113 192.168.254.114

What's wrong here?
How can I fix using my own DNS using netplan. And the DNS server is since it is on my local network.

score 0 · Answer 1 · answered Aug 14 '22 at 15:34

Your netplan file refers to Network Manager. I suggest that you revert netplan to its default:

# Let NetworkManager manage all devices on this system
network:
  version: 2
  renderer: NetworkManager

Next, set your static IP address and DNS in the Network Manager settings:

Reboot.

`resolvconf` changing current DNS. Netplan stict using nameserver

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