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Setting a static IP for your headless server is a must. Here are the simple steps to accomplishing this. navigate to the interfaces file /etc/netplan sudo nano /etc/netplan Here is an example of what mine looks like. # This is the network config written by 'subiquity' network: ethernets: ens18: addresses: [192.168.1.204/24] routes: - to: default via: 192.168.1.99 nameservers: addresses: [8.8.8.8, 8.8.4.4] version: 2 pre-up iptables-restore < /etc/iptables.rules post-down iptables-save > /etc/iptables.rules Save and close The last two lines pre-up and post-down is for iptables. remove those lines if you are not using the firewall. To apply the changes: sudo netplan apply If you want to verify that you are using the correct DNS: Use this command after you add/change your dns to restart systemd-resolved service. sudo systemctl restart systemd-resolved Use this command to verify the DNS routing. sudo resolvectl status